installation && sservice manual - hillphoenix · 2020. 2. 29. · installation &...

Installation && SServiceManual

GENERALThis manual has been designed to be used in conjunction with a Case

Specific Installation & Service Manual.Save the Instructions in Both Manuals for Future Reference!!

This merchandiser conforms to the Commercial Refrigeration Manufacturers Association Health and Sanitation standard CRS-S1-96.

PRINTED IN Specifications subject to REPLACES ISSUE PARTIN U.S.A. change without notice. EDITION 3/99 DATE 7/99 NO. 9027548 REV. D

Tyler Refrigeration Corporation * Niles, Michigan 49120

GENERAL Tyler Refrigeration

Page G-2 March, 1999

CONTENTSPage

SpecificationsLine Sizing Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-3Gas Defrost Liquid Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-4

Pre-installation ResponsibilitesShipping Inspections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-6CRMA Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-6Pre-Installation Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-7

Installation ProceduresCarpentry Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-7Case Line-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-7Trim Installation/Alignment . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-10Plumbing Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-13Recommended Drain Practices . . . . . . . . . . . . . . . . . . . . . . . . . G-13Refrigeration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-14Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-14Control Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-15Setting the Superheat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-15Defrost Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-18Off Time Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-18Optional Electric Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-18Optional Gas Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-19Optional Air Defrost . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-19Installation Procedure Check Lists . . . . . . . . . . . . . . . . . . . . G-20Use of Case Alignment Clamps . . . . . . . . . . . . . . . . . . . . . . . G-21

Cleaning and SanitationGeneral Cleaning Information . . . . . . . . . . . . . . . . . . . . . . . . . . G-22Case Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-23High Pressure Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-23

General InformationProper Case Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-24Shelf Light Sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-24Shelving Loads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-24

Service InstructionsPreventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-25800MA T-12 Lamp Replacement . . . . . . . . . . . . . . . . . . . . . . . G-25T-8 Lamp Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-25Remote Ballast Replacement . . . . . . . . . . . . . . . . . . . . . . . . . G-26Fan Blade and Motor Replacement . . . . . . . . . . . . . . . . . . . . G-27Color Band and Bumper Replacement . . . . . . . . . . . . . . . . . G-27Raceway Cover Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-29Kickplate Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-29

TYLER Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Back Cover

ART 2

Revise line-up dimension art.

Pick-up example sub-feed line sizecharts.

Installation & Service Manual GENERAL

December, 1996 Page G-3

Line Sizing Requirements

CAUTION

Low temperature suction lines and all liq-uid lines must be insulated in all applica-tions where subcooling (NC) is used!This prevents line damage and possibleproduct damage caused by freezing.

NOTE

Liquid and suction line lengths over 300equivalent feet are discouraged byTYLER. Contact applications engineer-ing for recommendations on applicationsexceeding 300 equivalent feet! HORI-ZONTAL SUCTION LINES SHOULDSLOPE ½” PER 10’ TOWARD THE COM-PRESSOR TO AID IN GOOD OILRETURN!

step on the basis of the number of linear feetyou are at in that case line-up. The suction linesizes will change in a long case line-up.

Liquid Line Sizing

Most single case installations require 3/8” liquidlines. To determine liquid line sizing for multicase line-up, see “Liquid Line Sizing” in “BUFF”section of “TYLER Specification Guide”.

Suction Line Sizing

The “Case-to-Case Suction Line Sub-FeedBranch Line Sizing” chart on each spec sheetcan be used to size the sub-feed branchlines. When the branch line only serves onecase, use the line size listed under 50 equiva-lent feet for that case. (Example: servicemeat case uses 1/2” line; multi-shelf caseuses 1 3/8” line.) Select each succeeding

Use 50’ Column for Sub Feed Line Size

Example Only

SPECIFICATIONSCAUTION

Exposure to directsunlight in over 80°Fambient tempera-tures can cause per-manent damage tothe vinyl materials. Ifexposure to directsunlight is anticipat-ed, loosely cover thecases with white canvas or plastic. Thisblocks direct sunlight and allows airmovement over vinyl parts. TYLER willnot be held responsible for damage dueto improper storage


Page G-4 October, 1996

Gas Defrost Liquid Lines

Gas defrost liquid lines to the cases shouldbe branched off the bottom of the header.This ensures a full column of liquid to theexpansion valve. A branch line from theheader to an individual case should be over3’ long and must have a 3” expansion loopincorporated.

Do not run suction or liquid lines throughcases that are part of a separate system,especially if either has gas defrost. If there isno way to avoid this, insulate the piping forthe portion that runs through the other cases.

Temperature variations of refrigeration anddefrost cycles cause piping to expand andcontract. Allowing for this expansion andcontraction will prevent piping failures. Thefollowing are typical expansion rates for cop-per tubing;

-100°F to -40°F = 2.5” per 100 foot run(ultra low temp)

-40°F to 0°F = 2” per 100 foot run (low temp)

0°F to 30°F = 1.5” per 100 foot run(medium temp)

30°F to 50°F = 1” per 100 foot run (high temp)

Expansion loops are designed to provide adefinite amount of travel. Placing the loop inthe middle of a piping run will allow for maxi-mum pipe expansion with the minimalamount of stress on the loop. Don’t use 45degree elbows for loop construction becausethey will not allow the lines to flex. Refer tothe charts on the next page for expansionloop lengths. Suction and liquid lines cannotbe joined together or be allowed to touch.Pipe hangers must not restrict the expansionand contraction of piping. Insulation on suc-tion and liquid lines makes the whole sys-tem more efficient! Insulate - it pays!

Header along cases - 7/8”

Line into cases are always 1/2”

Note: Tees point down

3’ Max. for gas defrost

Main liquid line must be 5/8” minimum (even with just 1 case)


October, 1996 Page G-5

Expansion Loop Sizing

Chart 1 is to be used for A, B, and C typeexpansion loops. Chart 2 gives the totallength of the expansion joint (L) along theouter surface.

Example: Given a 200’ run of 1 3/8” mediumtemp piping; there will be a linear expansion

of 3” to compensate for (medium temp 1.5”per 100’). Pipe diameter has no affect on theamount of linear expansion but is needed fordetermining the size of the expansion loop.Find the 3” column at the top of Chart 1 andgo down until it crosses the 1 3/8” row. TheX dimension is 24”, 48”, or 72” for A, B, or Ctype expansion loop respectively.

‘X’ Length - (in inches) for Linear Expansion of:

‘L’ Developed Length of Expansion Offsets

TubeO.D.

TubeO.D.

Type “A” Loop

Type “B” Loop

Type “C” Loop



Shipping Inspections

Shipping Damage

All equipment should be thoroughly exam-ined for shipping damage before and duringunloading.

This equipment has been carefully inspectedat our factory and the carrier has assumedresponsibility for the safe arrival of our prod-uct. If damage is concealed or apparent, aclaim must be made to the carrier.

Apparent Loss or Damage

Obvious loss or damage must be notedimmediately on the freight bill or expressreceipt and signed by the carrier’s agent. Ifthis is not done, the carrier may refuse theclaim. The carrier will supply the necessaryclaim forms.

Concealed Loss or Damage

When the loss or damage is not apparentuntil after the equipment has been uncrated,a claim for concealed damage must be filed.Upon discovering the damage, make requestin writing to the carrier for inspection within15 days and retain all packing. The carrierwill supply the inspection report and requiredclaim forms.

Application Recommendations

These cases are designed and built to beused in properly air conditioned stores thatmaintain a store temperature at or below 75F(dry bulb) and a 55% relative humidity. Thesecases may not operate satisfactorily at highertemperature and humidity conditions.

Temperature performance is important forcontrolling bacteria growth. The installer isresponsible for following these instructions asset forth within this Installation and ServiceManual. Any variance will produce poor per-formance, thus releasing TYLER Refrigeration

Corporation from any liability.

Refrigeration piping must be sized asdescribed within this manual by the installer.Normal applications require refrigeration pip-ing to be insulated unless otherwise stated.Refer to “Liquid and Suction Line SizingInformation” section in this manual forTYLER’s requirements.

PRE-INSTALLATION RESPONSIBILITIES

TYLER Refrigeration Corporation of Niles,Michigan is a member of CRMA, CommercialRefrigerator Manufacturers Association. Thisgroup has published a Health and SanitationStandard for Retail Food Store Refrigerators,CRS-S1-96. TYLER has subscribed to thisstandard which outlines various practices andconstruction methods that manufacturers fol-low to assure proper refrigeration of productsdisplayed or stored in the case and to assurethe user practical cleanability.

The information contained herein is based ontechnical data and tests which we believe tobe reliable and is intended for use by personshaving technical skill, at their own discretionand risk. Since conditions of use are outsideTYLER’s control, we can assume no liabilityfor results obtained or damages incurredthrough the applications of the data present-ed. SPECIFICATIONS ARE SUBJECT TOCHANGE WITHOUT NOTICE. Printed in theU.S.A.


September, 1998 Page G-7

Pre-Installation Check List

All cases containing glass MUST be stored andinstalled on level surfaces to avoid possibleproduct damage and/or glass breakage.

1. Check for hidden damage while unloadingand unpacking of the case.

2. Check the “shipped loose” parts for anyitems; such as shelves, nuts and bolts,caulking, access doors, etc.

3. Check the equipment - remove the screwsused to hold down the deck pans duringshipping. Remove the pans and check thefollowing, if applicable:

4. Remove all packing material.

5. Check all flare nut connections for tightness.

6. Check all fan bracket bolts for tightness.

7. Check all electrical plug-in connections forpositive seal.

8. Make sure the expansion valve feeler bulb issecurely attached to the suction line.

9. All field wiring and plumbing MUST conformto national, state, and local codes.

10. Do not remove plugs (from flare nuts) orcaps (from threaded connections) until theunit is ready for final hook-up. All coils arepressurized and have a Schrader Valveaccess fitting. If pressure has been lost,check for leaks.

INSTALLATION PROCEDURES

Carpentry Procedures

Case Line-Up

Before starting the case line-up, review thestore layout floorplans and survey the areaswhere case line-ups are going to be installed.

WARNING• These cases are very heavy and require

two or more people to move and/or posi-tion them.

• Do not walk on the tops of these cases.Tops of cases are not designed to sup-port the weight of a human being.

Improper handling of these cases couldresult in personal injury.

NOTE

Allow at least 3” of air space between theback of these cases and store walls or othercases to minimize possible condensationproblems. Forced ventilation might be nec-essary in some situations.

1. Snap chalk lines where the front and rearbase rails of the cases are to be located forthe entire line-up.

NOTE

Front and rear edges of base rails shouldalways be used to line-up cases. 6” shimsallow adjoining ends of cases to beshimmed together.

2. Locate highest point on chalk lines as a ref-erence for determining the number of shimsto be placed under the case base rails.Position first case at highest point on thechalk lines and shim case supports asrequired. Check leveling at hand rails, topof case, and back of case.



CAUTION

Shipping braces should only be removedfrom case ends that are to be joined. Thisprotects the cases from possible damageduring the line-up procedure.

NOTE

A foam gasket is factory installed on oneend of the case. This gasket fits into agroove on the adjoining case when casesare pulled together. Do not depend on thefoam gasket alone to make a good seal!

3. Apply two heavy beads of caulking com-pound from the Filler Kit to the end ofcase at dotted (. . .) and dashed (- - -)lines. Proper caulking provides goodcase refrigeration and sanitation.

4. On multi-shelf cases, remove bottom tray(1), front duct (2) and rear and/or top pull-up access covers (3).

On single deck cases, remove bottomtray (1), front duct (2) and rear pull-upaccess cover (3).

On waterfall produce cases, remove bot-tom tray (1) and access covers (3).

CAULKING


March, 1999 Page G-9

On island cases, remove front and rearpull-up access covers (3).

6. Push cases tightly together making surethe pull-ups are aligned.

On LNG, L3MGA, L2P cases, remove bot-tom tray (1), front cladding (4), and/orrear pull-up access cover (3).

5. The canopy backer (5) is shipped in placewhile the remaining backers and hard-ware are in a plastic bag taped to the inte-rior of the case.

8. Position all pull-up bolts and/or mountinghardware (11) at pull-up locations (A andB), (A, B and C) or (A, B, C, and D). Donot tighten any pull-up hardware until allof it has been installed. Tighten all pull-uphardware equally starting at point A andfinishing at point D. Do not overtighten.

7. Add shims (6), as required, under theadjoining case base rails (7). Check lev-eling at hand rails (8), top of case (9), andback of case (10). NOTE: Shelvingbracket slots must be aligned. Use rec-ommended case alignment clamps tohelp installation. See page G-21.

CAUTIONDo not drill or use other holes through thecase end for pull-ups. This may deformthe case end and could cause joint leaksand/or poor refrigeration.


Page G-10 January, 1999

1. Apply bead of caulking compound fromthe Filler Kit to the top of each horizontaljoint (1). If gap at horizontal joint is toolarge, pull together with sheet metalscrews (2) or pop-rivets (3).

NOTEIf additional sealing is preferred, 2” wideduct tape can be applied to the top of theinternal bottom joint between cases. Thetape will be covered by the horizontal jointtrim. Duct tape is not furnished.

2. Apply sealer to horizontal joint trim (4)and install joint trim (4) on the horizontaljoint (1).

Front Glass Trim Installation

The following instructions can be used toinstall the front glass trim on cases with 6” or14” front glass.

Trim Installation/Alignment

Upper Trim Installation

Loosen screws as needed to line-up thecanopy hoods. Hoods are adjustable in alldirections.

1. For interior joint trim, use a screwdriverthrough top pull-up access hole to posi-tion the canopy hood backer (1) so itbridges any gap between the canopyhood case joint (3). For exterior jointtrim, position canopy joint trim (2) overany gap between the canopy hood joint(3). Secure canopy hood backer (1) or

canopy joint trim (2) with screws at topand bottom as shown.

2. Install top pull-up access cover (4) tocases (5) with four screws (5).

Horizontal Joint Trim Installation

9. Install all pull-up access covers (3), frontduct (2), bottom tray (1) and/or frontcladding (4), where applicable.

10. Remove shipping tape from all fluores-cent lamps.


July, 1998 Page G-11

NOTEMake sure top of front glass is aligned be-fore installing the front glass trim.

1. Position front glass trim (1) over the topand in front of the glass joint (2).

2. Using holes in front glass trim (1) as aguide, drill holes in front glass retainer (3).

3. Secure front glass trim (1) with twoscrews (4).

Bumper and Color Band Adjustment

3. To adjust a bumper backer (4): removebottom of both bumpers (2) at the joint;reposition the bumper backer (4) behindthe joint; snap bumpers (2) back in place.Make sure color band backer is centeredbehind any exposed color band joints.

4. Slide bumper end trim (6) to expose theend gap between the end of bumper (2)and the patch end. Position left or rightend tensioner (7) against end of thebumper (2) with slots pointing inward.Mark location of end tensioner slots onbumper (2). Drill 3/8” access holesthrough the bumper. The holes must belarge enough for the screws (8) to fitthrough and close enough to the end ofthe bumper to be covered by the bumperend trim (6) when positioned against thepatch end. Adjust end tensioner (7) tightagainst the bumper (2) and secure withtwo screws (8). This will hold thebumpers in the proper alignment. Positionbumper end trim (6) over end gap andbumper end tensioner mounting holes.

1. Slide hand rail/bumper retainer (1) andbumper (2) towards the center of the line-up to butt them against the adjoining handrail/bumper retainer (1) and bumper (2).

2. Position hand rail backer (3) to cover anyremaining space between the adjoininghand rail/bumper retainers (1).

NOTEColor band backers on glass front casesare installed by sliding the band towardopen end, inserting the backer at the casejoint and sliding the band back over thebacker. Installation of backer at last jointin a line-up requires bumper and bumperretainer removal on the end case.


Page G-12 July, 1999

Raceway Cover Installation

NOTERaceway covers are shipped loose. Theyshould not be installed until all case pipingand electrical hook-ups are complete.

1. Position top of raceway cover (1) in bot-tom of lower cladding (2).

2. Center the raceway backer (3) behind jointof adjoining raceway covers (1).

3. Rotate raceway cover (1) down and posi-tion retainer plates (4) with screws (5).Slide all raceway covers (1) toward centerof case line-up then tighten retainer platescrews (5).

4. After raceway covers have been slidtogether towards center of case line-upand secured, install top of raceway endtrim (6) in lower cladding (2) and securebottom with screw (7).

Kickplate and End Closeoff Installation

NOTEKickplate supports MUST be installedbefore piping case.

Kickplate and end closeoff should not beinstalled until all case piping and electricalhook-ups are complete.

1. Position slots of kickplate support assem-blies (1) over premounted base rail shoul-der screws (2). Push kickplate supportassemblies down until they are flush withthe floor.

2. Position kickplate backer (3) so half of itextends beyond end of kickplate (4).

3. Install kickplate (4) onto kickplate supportassemblies (1) by snapping top and bot-tom into place. Position all kickplates (4)so ends are tightly aligned.

4. Install the lower end closeoff (5) betweenbottom of patch end and case base rail.The flanged end of the closeoff (5) shouldcover the kickplate end (4).



Plumbing Procedures

Recommended Drain Practices

CAUTION

A clogged waste outlet blocks refrigera-tion. This could result in inadequate casecooling and possible food spoilage.

The installer is responsible for the proper andcode approved installation of a system whichdispenses condensate waste water throughan air gap into the building’s indirect wastesystem.

Waste outlets and drip pipes from refrigera-tors are not intended for direct connection tothe building plumbing system. All remoterefrigerators equipped with automatic or offtime defrost systems are provided with awaste outlet. The outlet is located in the low-est level of the compartment to which wastewater will drain.

All TYLER display refrigerators are providedwith a water seal. It may be factory installedor shipped loose for field installation. Ifshipped loose, the installer must followTYLER’s installation procedure as outlinedwithin this manual.

The importance of proper drain connectionscannot be overemphasizes. Complicationsresulting from drainage problems can beavoided by following these good drainageguidelines.

2. The maximum length of waste pipeshould not exceed 12 feet.

3. Waste pipe is recommended. Never usesmall diameter copper tubing for wastepiping.

4. On low temp cases, the trap must beaway from the tee to prevent possiblefreezing of the trap.

5. Up to two case drains can utilize one floordrain. NOTE: Both case drains requireindividual water seals.

6. Never put two case drains with two trapson the same waste pipe. This can causean air trap on one of the case drains.1. The minimum slope of waste pipe should

be 1/4” per foot, or more if possible.



Refrigeration Procedures

Refrigeration System

CAUTION

• Protect Schrader valve core and capand the expansion valve feeler bulbfrom excessive heat by removing themwhen necessary. Replace properlybefore starting the system.

• Brazing and welding operations shouldbe kept away from both the metal drainpan and sealing materials in the drainarea. High temperature exposure inthese areas may cause damage to sealsand/or painted surfaces of the drainpans.

The type of refrigerant used in the case willbe specified on the unit nameplate. ASchrader valve is provided at the left of eachcoil for system testing and charging.

The suction and liquid lines to the evaporatorcoils are capped off. This holds the dry nitro-gen charge inside the evaporator coils.When cutting off the caps, use a tubing cutterto prevent the introduction of copper shav-ings to the system. See the model specifica-tion sheet in the case specific I&S manual forproper line entry and positioning specifica-tions.

Only use clean, dry, sealed refrigerationgrade copper tubing. Make copper to copperjoints with phos-copper alloy (5% silver) orequal. Make dissimilar metal joints with sol-der having 35% silver. To prevent internalcontamination of the line, limit the use of sol-dering paste or flux to the minimum required.Flux only the male portion of the connection.

Piping should be purged with dry nitrogen orcarbon dioxide during brazing. This preventsthe formation of copper dioxide and scaleduring brazing. Copper dioxide and/or scalecan easily clog the small ports in systemvalves and pilot valve.

NOTE

The tubing design pressure is 183 psig forthe lowside and 390 psig for the highside.Do not exceed these pressures.

Line Entry

Refrigeration lines entry may only require asingle entry for an entire line-up of cases. Itcould enter the line-up at one end or branchboth ways from the center. Refrigeration linesmay be run from case to case in areas desig-nated for them. Notches are provided in bothends for this purpose.

Line sizing should meet the suction and liquidsizing requirements for that case location inthe line-up. See “Line Sizing” section in thismanual. If the cases are connected to a par-allel system, the line size will be specified onthe system printout.

CAUTION

Do not run tubing through these cases toanother machine if the cases are con-trolled by a pressure control. Pressuresensed from the coldest location couldaffect the pressure control in a secondsystem. This is called cross-controllingand should be avoided.

A pressure drop in the suction line means aloss in system capacity. It forces the com-pressor to operate at a lower suction to main-tain the desired temperature in the evaporatorcoil. Pressure drops reduce compressorcapacity and increase system compressionratios causing higher operating costs. Tominimize pressure drop, keep the refrigera-tion line run as short as possible and thenumber of fittings to a minimum.

All suction lines should be insulated to mini-mize heat absorption and condensation drip-page. Seal refrigeration lines where theyenter the case. Sealing is necessary to pre-vent condensation, air leaks and other prob-lems. Be sure it is done before leaving thejob.



4. Parallel compressor system, or otherapplications needing a more accuratetemperature control. An evaporator pres-sure regulator (EPR) valve is installedbetween the case and the compressor.The EPR valve is set to control the casesuction pressure which corresponds tothe desired case temperature. The EPRvalve will hold a relative constant pressureat the case and will not allow it to gobelow a set pressure.

*See model specification sheet in the casespecific I&S manual for specific controlsettings for each case.

Setting the SuperheatUse the instructions, illustration, and chartbelow to determine the superheat.

NOTE: This illustration shows the generallocation of piping and components in acase with two expansion valves.

1. Make sure all connections to the expan-sion valve(s) are tight.

2. If a case has more than one expansionvalve, starve the flow to the front coil’sexpansion valve by turning in the adjust-ing screw 1 ½ turns.

NOTE

It is very important to have a good sealaround the refrigeration lines. This willprevent any water leakage into the bottomof the case. During the installationprocess do not disturb the factory sealbetween the drain and case ends. Thisseal must remain water tight. The accessopening should be insulated along with allrefrigeration lines exiting the case to pre-vent condensation buildup on cold sur-faces.

Control OptionsThe temperature of case line-ups can be con-trolled by one of the following methods:*

1. Indoor single compressor system notusing a liquid pump down before defrost.The low pressure control on the compres-sor system can be set to cycle the com-pressor on and off at specific pressuresthat correspond to the desired tempera-ture range at the case.

2. Indoor single compressor system needinga more accurate temperature control. Athermostat can be mounted with its sens-ing bulb in the discharge air stream onthe case. The thermostat is used to cyclethe compressor on and off at specific tem-perature to maintain the desired casetemperature range.

3. Outdoor single compressor system usinga liquid pump down cycle before defrost,or other applications that need a moreaccurate temperature control. A thermo-stat can be mounted with its sensing bulbin the discharge air stream on the case.The thermostat is used to cycle a mainliquid line solenoid valve on and off atspecific temperatures to maintain thedesired case temperature range. The liq-uid line solenoid valve used for tempera-ture control should be mounted as closeto the case as possible to minimize thetemperature swing that may occur afterthe valve closes.



NOTE: Rear coil expansion valve shouldalways be adjusted first.

3. Install pressure gage on the coil output.Most TYLER cases have a Schrader fittingfor this purpose. Record the pressurereading.

4. Using the table on the following page,convert this pressure to a temperature.

5. Take a temperature reading from the suc-tion line adjacent to the expansion valvebulb being tested.

6. Subtract the temperature conversion (step4) from the suction line temperature (step5). This is the superheat of the evapora-tor.

7. If case has more than one expansionvalve, reset front coil expansion valve byrepeating steps 2 thru 5.

See next page for adjustment settings for Sporlan and Alco Expansion Valves.

TEMPERATURE-PRESSURE CHART



SPORLAN VALVES:

The number of adjustment turns availablebetween stops on the Sporlan valves is 9 to10 turns (in or out).

• With R-22 refrigerant, 1 turn will result inapproximately a 5.5 or 3°F superheatchange for low or medium temperatureapplications respectively.

• With R404A refrigerant, 1 turn will result inapproximately a 4.5 or 2.5°F superheatchange for low or medium temperatureapplications respectively.

• With R-502 refrigerant, 1 turn will result inapproximately a 5 or 2.5°F superheatchange for low or medium temperatureapplications respectively.

• With R-507 refrigerant, 1 turn will result inapproximately a 4.5 or 2.5°F superheatchange for low or medium temperatureapplications respectively.

ALCO VALVES:

The number of adjustment turns availablebetween stops on the Alco valves is 10 to 12turns (in or out).

• With R-22 refrigerant, 1 turn will result inapproximately a 4.5 or 2°F superheatchange for low or medium temperatureapplications respectively.

• With R404A refrigerant, 1 turn will result inapproximately a 3.5 or 1.5°F superheatchange for low or medium temperatureapplications respectively.



Balanced Port Expansion Valves used inTYLER cases are preset by an air pressurebench test. Some final adjustment may benecessary due to system designs, pressuredrops, and coil loading. Adjustments shouldbe made with liquid pressures near design,and after the case has been loaded andpulled down to normal temperature require-ments. Final adjustments are used to maxi-mize case temperature and efficiency.

There is no magic superheat number. Propersettings can actually occur from as low as 4or 5°F up to extremes of 17 or 18°F of super-heat. Most settings will fall in the 6 to 12°Frange. A proper method is to find a settingwithin the ranges previously mentioned thatprovides the most stable bulb temperature.Sometimes there will be a flat reading with vir-tually no variation. This usually provides thelowest discharge air temperature reading.

Proper expansion valve settings cannot bemade in a few minutes. Only turns of ¼ to ½should be made at one time. Wait 15 min-utes to allow the system to settle out. Pleaserefer to comments below regarding the differ-ences in adjustment between Sporlan andAlco expansion valves.

CAUTION

Forcing the adjustment beyond the stopswill result in damage to the valve.

NOTEAll of the following changes are approxi-mate and should only be used as a guide-line!



Defrost Information

NOTE

See Case Specific I&S manual for individualdefrost settings and klixon locations.

Off Time Defrost

All cases that use a refrigerated coil that oper-ates below the freezing point of water will col-lect frost during the refrigeration cycle. Toomuch frost build-up on the cooling coil stopsthe effective air flow and refrigeration. An offtime control stops the refrigerant and allowsthe case to defrost at the proper time andduration each day.

The refrigeration is stopped with a time clock(mechanical or electronic) by either turning offthe compressor directly, or closing a liquid linesolenoid or suction isolation valve (ex. suctionline solenoid or suction stop EPR valve). Thetime clock is set for the proper number ofdefrosts per day and the proper duration per

defrost based on the information providedunder “Specifications” in the case specificmanual. The time clock may be an individualclock on single compressor system; a multi-circuit clock on parallel compressor system;or an electronic clock on either compressorsystem.

Optional Electric Defrost Details

When an electric defrost is initiated, power issupplied to the defrost heater. The defrostheater is located in front of the coil. Thedefrost heater will be turned off or de-ener-gized when the defrost limit klixon clipped tothe right end of the coil, opens at its specifiedtemperature.

Balanced 3-Phase Defrost Wiring

The largest number from any of the followingwill be the highest load on any single phase.This is called the high leg amps. In the fol-lowing example a TG-3-30 defrost module isrequired.



L1 = All Loads on leg 1 x 1.732

L2 = All loads on leg 2 x 1.732

L3 = All loads on leg 3 x 1.732

activate and deactivate the drain pan heateras needed during the defrost cycle.

Optional Air Defrost Details

Most TYLER multi-shelf meat and deli mer-chandisers can be equipped with air defrost.Air defrost effectively defrosts with compara-ble product quality to electric or gas defrost,but costs less. The reversible permanent splitcapacitor (PSC) fan motors which make airdefrost possible, cuts the cost of fan opera-tion considerably. The motor design and thecapacitor required for reversal makes themotor much more efficient.

When an air defrost is initiated, fan operationis reversed. This causes the fans to circulatestore air in place of refrigerated air supply. Aklixon (42°/32°) is located on the right end ofthe coil. When all cases on that circuit havereached 42°F, the defrost will be terminatedand the fans will switch back.

The purpose of the following arrangementsis to stop the flow of refrigerant throughthe display so that it may defrost:

Single Condensing Unit

Liquid flow may be interrupted by a normallyclosed liquid line solenoid valve (installed atthe compressor or case) controlled by a ther-mostat and wired to the time clock. The timeclock would cause the solenoid to close, thiswould in turn shut off the flow of liquid refrig-erant to the system(s). The compressor

EXAMPLE:

L1 = 13.8 + 8.6 + 8.6 x 1.73 = 26.8 amps2

L2 = 13.8 + 18.8 x 1.73 = 23.9 amps 2

L3 = 13.8 + 8.6 + 8.6 x 1.73 = 26.8 amps 2

In this case the high leg amps equals 26.8.

Optional Gas Defrost Details

When a gas defrost is initiated, the evaporatoracts as a heat exchanger for incoming liquidduring the refrigeration cycle and as a drainpan heater during gas defrosting. A defrosttermination klixon is located at the bypasscheck valve. When the defrost terminationklixon senses the appropriate temperature, itshuts off the flow of hot gas. Most cases usea 55° or 60°F defrost termination klixon thatwill represent 70°F due to time lag. Use 70°Ftermination setting for electronic temperaturesensors. On L6DA deli cases, meat casesand glass door cases , the fans are deacti-vated during gas defrost by a fan delay klixonlocated on the right end of the coil. Fan oper-ation will restart when the klixon senses theappropriate temperature. On glass doorcases, there is an additional klixon used to

13.8 13.8

8.6

8.6



would continue to run and pump down thesystem(s). The condensing unit would soonshut off on low pressure. The time clock mayalso be wired directly to the compressor con-tactor.

Parallel Compressor Unit

For cases operated from a parallel compres-sor rack, an evaporator pressure regulator(EPR) valve may be factory installed on thesuction stub of the parallel compressor rack.The EPR valve will work in conjunction withthe defrost circuit(s). This is temperature reg-ulation (by pressure) of the entire lineup. Asolenoid may be used in conjunction with theEPR valve to stop refrigerant flow duringdefrost.

Installation Procedure Check Lists

Carpentry (Line-Up) Check List

NOTE

All necessary hardware and caulking canbe found in the Filler Kit located in the wellof each case.

1. Check the level of the floor area where thecases are going to be lined up.

2. Set and level the first case at the highestpoint on the floor.

NOTE

Adjacent cases may require differentamounts of shimming to allow for propercase line-up.

3. Level cases as necessary to align casepull-ups, fronts, tops, and allow for prop-er operation.

4. Have case to case joints been properlycaulked and sealed? Each joint requirestwo beads of caulking where the casesjoin together. One bead on the inside andoutside of the foam gasket and doorframe assures good sanitation and refrig-eration. See “Case Line-Up” in this manu-al for proper caulking locations.

5. Have the patch ends been properlycaulked and installed with the properhardware?

6. For cases with shelves, make sure theshelving bracket slots on multi-shelf casesline-up and that the shelves are installedin the proper position.

NOTE

The bumpers should all be pushed tightagainst the center case in the line-up andsecured with the end tensioners before theend trims are installed.

7. After cases are completely installed, makesure all bumpers, front cladding, racewaycovers and kickplates are properlyinstalled and secured.

Plumbing Check List

1. All plumbing must conform to all national,state and local codes.

NOTE

Be sure the drain is installed in accor-dance with the following specifications andthe drain instructions in this manual.

2. The minimum slope should be ¼” perfoot or more if possible.

3. The maximum length should not exceed12 feet.

4. Never downsize the drain lines. Linesshould be at least the same diameter asthe trap.

CAUTION

Hooking two cases and traps into thesame drain line will cause an air trap inone of the two cases. This will causeimproper drainage to the case with the airtrap.

5. Two cases can utilize one floor drain aslong as both lines and traps are run sepa-rately to that drian.


December, 1996 Page G-21

Electrical Check List

1. All field wiring must conform to national,state and local codes.

2. Make sure all electrical connections areproperly connected and tight.

Refrigeration Check List

In addition to the standard practices whichshould be used in the installation of this case,the installer should pay particular attention tothe following items:

1. Has the refrigerant line entry beencaulked thoroughly?

2. Are all fans running? Are the fan electricalconnections tight?

NOTEProper settings and/or temperatures foritems 3, 4 and 5 can be found in the“Model Specification Sheets” in the casespecific I&S manual or the “BUFF” sectionin the Specification Guide.

3. Is the defrost control set for correct num-ber of defrosts per day?

4. Is the failsafe set for the proper times?

5. Does the discharge air temperature matchthe recommended temperature for thiscase?

6. Is the suction pressure drop less than 2PSIG from the last case to the compres-sor? (Remote case only)

7. Are the expansion valve feeler bulbssecurely attached to the suction lines?

8. After final hook-up of the case, let it runthrough a defrost cycle (preferably two ormore). Check the duration and frequencyof the defrost cycle for compliance tospecification data.

9. Check the operating temperature to besure the case is functioning within the rec-ommended guidelines.

10. Verify that the store temperature andhumidity levels are within the recommend-ed guidelines. Use a wet and dry bulbpsychrometer to check the store tempera-

ture. Check for outside influences thatmight affect the case performance.(Example: Drafts from ventilator openingsor radiant heat from light fixtures that aretoo close.)

Use of Case Alignment Clamps1. Check and mark the floor where the cases

are to be set.

2. Set the first case in the line-up on the high-est point of the floor.

3. Level the first case end-to-end and front-to-back using the provided shims.

NOTE6” shims should be placed beyond the endof the base rails so the next case can be seton the same shims.

4. Set the next case in the line-up. Use twoalignment clamps on the horizontal joint inthe bottom of the cases. The clamp nearthe front of the cases will line-up the handrails. The clamp near the back of the caseswill line-up the shelving bracket slots.

5. Level and shim the case end-to-end andfront-to-back.

6. Adjust the alignment clamps as needed toallow for the installation of pull-up hardware.

NOTEDo not remove alignment clamps until thepull-up hardware has been tightened.

NOTEIndividual casealignment clampsare availablethrough TYLERService PartsDepartmentunder Part No.5092494.



Rigid vinyl surfaces (bumpers, handrails,raceways & kickplates) should be cleanedwith a soft cloth and warm soapy water, orwith non-abrasive cleaners like Fantastik orPro Formula 409 with a mildly abrasivesponge. Both of these cleaners will do anexcellent job in most instances. Clean diffi-cult spots with Comet cleanser with chlorinaland a plastic scrubber or abrasive sponge.Manufacturers directions should be followedcarefully.

CAUTION

Do not use Comet on corner or vacuumformed trim. Discoloration could occur.

Nylon corner trim for island cases and vacu-um formed trim for wedge cases should becleaned only with Fantastik or Pro Formula409.

Cleaned surfaces treated with Armour All orPledge furniture polish will help keep surfaceslooking good and make them easier to clean.

WARNING

Do not use hot water on cold glass sur-faces. This can cause the glass to shatterand could result in personal injury. Allowglass fronts, ends and service doors towarm before applying hot water.

Exterior and interior glass surfaces, brushedaluminum and chrome should be cleanedwith a lint-free cloth and warm water or glasscleaner.

Remove normal accumulation of dirt anddebri daily to maintain efficient refrigeration.Interior surfaces require different cleaningintervals. Meat and produce cases should becleaned at least once a week; dairy casesevery two to four weeks; and frozen foodcases every two to six months. Interior sur-faces may be cleaned with most domesticdetergents and sanitizing solutions with noharm to the surfaces.

Honeycombs or grids in the air ducts shouldbe checked and cleaned whenever the caseinterior is cleaned. To clean a honeycomb orgrid, remove the screws, retainer and honey-

CLEANING AND SANITATION

General Cleaning InformationEquipment life and performance are directlyrelated to good cleaning and sanitation prac-tices. Recommended cleaning intervals willvary depending on the case’s useage.Cleaning cases and case parts regularly willkeep high sanitation levels, increase case life,and minimize maintenance costs.

Most TYLER cases provide the following casecleaning features to support good cleaningand sanitation practices.

• Removable front ducts and lower trays

• Fully accessible 1 1/2” or 2” waste outletson most cases

• Hinged or easily removable fan panelsprovide access to lower coil and drain pan.

• Seamless, smooth drain pan is water-proofand contoured for easy cleaning and rapiddrainage.

Since cases are made up of different types ofmaterials, the care requirements change withthe material type and style.

CAUTION

• Never use abrasive scouring pads orcleansers on exterior or interior sur-faces. The abrasive materials couldscratch the surfaces.

• Do not use any ammonia based clean-ing products on any cases with elec-tronic and solid state components. Theammonia will permanently damagethese components.

Exterior metal surfaces are painted with highquality baked-on polyester base refrigeratorenamel. This material should be cleaneddaily with a damp cloth. After initial installa-tion, apply coat of appliance wax these sur-faces. Repeat wax application as necessaryto keep surfaces shining.


June, 1997 Page G-23

comb or grid from the air ducts. Clean thehoneycomb or grid with compressed air, vac-uuming system, or spray detergent and rinse.Make sure the honeycomb or grid is drybefore replacing it in the case. Reinstall hon-eycomb or grid in air duct and secure withretainer and screws.

Case CleaningAll case cleaning is dependent on properinstallation of the cases with good caulkingbetween cases and adequate case drainagesystem.

NOTE

Consult a service agency for propermethod of shutting off the refrigeration andelectrical supply.

1. Shut off refrigeration supply to the case(s)and electrical power to the case fans, anti-sweat wires and internal lights.

2. Remove product from case and store inan another case or walk-in facility.

3. Remove screens, trays, bottom pans andducts where applicable. Clean parts sep-arately as discribed on this page.

CAUTION

Do not soak lighted shelves! Water willshort or damage to the shelf lighting sys-tem.

4. If case has lighted shelves, remove andclean separately by wiping with a dampcloth. Make sure receptacle covers areinstalled when shelves are removed.

5. Remove all loose debris from the case. Itcould clog the drain during cleaning.

NOTE

• If a germicidal detergent is not avail-able, rinsed after cleaning with deter-gent and apply a sanitizer. Rinse thesanitizer thoroughly and let air dry.

• When cleaning and rinsing this case, trynot to use water faster then the casedrain can carry it away.

6. Clean surface with warm water and germi-cidal detergent at recommended concen-tration. A brush or cleaner pad will aid inremoving dirt. Don’t soak electrical wiringand fans unnecessarily. Rinse thoroughlywith clean water and let air dry.

7. Replace all internal parts so that they seatproperly. This is necessary for propercase operation.

WARNING

Never turn case electrical power on until allcomponents are dry! Reconnecting powerto case with wet components could causedamage the case or personal injury.

8. Restart refrigeration supply to the case(s)and electrical power to the case electricalcircuits.

9. Replace product after the case hasreached the proper operating temperature.

High Pressure CleaningIf a high pressure cleaner is used for casecleaning, the following cleaning precautionsmust be taken.

WARNING

Wear safety goggles while using high pres-sure equipment. This equipment isdesigned to operate at 500 psi pressure.High pressure water and/or flying objectscould cause eye or other bodily injuries.

• Remove all loose and removable electri-cal components before using high pres-sure equipment.

• Do not use water over 160°F. Water toohot will cook soil into place and obscurethe worker’s visability.

• Do not misuse high pressure sprayequipment by directing spray on anyelectrical equipment such as fan motorsand light sockets.

• Do not direct high pressure spray atcase joints or glass joints. The sealsmay not hold up to the high pressure.


Page G-24 May, 1999

GENERAL INFORMATION

Proper Case Usage

Display Practices

Do not let a flair for spectacular exceed therefrigerating capacity of the cases. Moundsof product over the load lines or large sig-nage cards interfere with case air flow.

Displays of products in multi-shelf casesrequire rotation to prevent frost accumulation.Jumble displays of cans should be avoided.Uneven display surfaces cause extra air tur-bulence that make heavier frost deposits onthe coils.

Stocking & Maintenance Practices forMulti-Shelf Low Temperature Cases

A large volume of air is constantly in motionin all makes of multi-shelf low temperaturecases. When the case is defrosted, air tem-perature rises for the short time it takes thecase to defrost. The relatively warm air caus-es frost to be deposited on the cold products.Most frost is removed naturally, shortly afterthe defrost cycle ends. However, some frostmay remain on the products stored in theback of the case. Product rotation is themoving of product from the rear to the frontand adding new stock to the rear. This pre-vents frost from accumulation on productsstored in the rear of the case.

NOTE

Frozen foods are perishable and cannot beleft on display indefinitely.

Clean multi-shelf cases regularly.Removing loose bits of wrappers or otherdebris daily, prevents the need for shuttingdown the case for major cleaning. Keepingdrain clogging litter out of the case is veryimportant in preventing refrigeration failure orsub-par performance.

Shelf Light Sockets

Shelf light plug sockets allow for shelf posi-tioning. Vertically adjustable shelf light sock-ets move up or down to clear back edge ofshelf for electrical connection.

CAUTION

Make sure the shelf light plugs or recepta-cle covers are completely inserted into thelight socket receptacles. This preventselectrical arcing and/or possible equip-ment damage .

Shelving Loads

Case shelves aredesigned to holdapproximately 40lbs per sq. ft.NOTE: Slots inthe shelf bracketsengage in theback of theshelves when the brackets are in a downposition. This provides additional shelf sup-port.

Shelf Load ChartShelf Shelf Area MaximumSize (in) (Sq. Ft.) Shelf Load12 x 48 4 16015 X 48 5 20018 X 48 6 24020 X 48 6.7 26822 X 48 7.3 292


March, 2000 Page G-25

SERVICE INSTRUCTIONS

Preventive Maintenance

1. Set up a routine cleaning program, as out-lined in this manual. Make sure employeesare aware of the need for proper casecleaning and follow the recommendedguidelines.

WARNING

Always shut off electricity to case beforecleaning and/or inspecting electrical compo-nents and/or connections. Moisture onelectrical components could cause electricalshock and/or personal injury.

2. When cleaning this case, don’t overlooksuch things as the fan blades and coils. Besure to keep fan blades and exposed coilsfree of dirt and dust. Accumulated dirt onfan blades could lead to premature fanmotor failure.

3. Make it a policy to perform routine inspec-tions of the electrical connections. Checkthem for loose connections and/or frayedwires. Make sure the lamp guards areinstalled correctly. Serious problems canbe avoided by taking care of small prob-lems when they are found.

4. Keep the drains clean and free of debris.Clogged drains rob the case of neededrefrigeration.

5. Do not use ammonia or ammonia basedcleaners on or around electronic orsolid-state components. The ammoniawill damage these components.

6. Periodically inspect the insulation aroundthe suction lines. Repair or replace anyloose or missing insulation. These linesmust be insulated at all times.

7. Make sure the case is loaded correctly. Donot use large signage in a case. Do not letthe product block or cover the air ducts, orextend above the “load lines”. Keep theproduct stored or stacked neatly.

8. Check the enviroment around the case.Misdirected air drafts from fans, open win-dows, or doors can adversely affect thecase performance. Extra lighting can alsoaffect the case temperature.

WWAARRNNIINNGGFluorescent lamps contain mercury. Donot put lamps in trash. Recycle or dis-pose mercury as a hazardous waste.

800MA T-12 Lamp Replacement (Canopy)

CAUTIONShut off light switch or disconnect powersupply before changing a lamp. Lightingsystem power and/or ballast surges canburn out adjacent lamps if power is left on.

1. Remove burned out lamp (1) from lightfixture (2). Slide lamp (1) to one side orthe other against spring loaded lamphold-er (3) and carefully remove lamp (1) fromthe stationary lampholder.

2. Insert end of new lamp (1) into springloaded lampholder (3) and push in untilopposite end of lamp (1) can be insertedinto the stationary lampholder.

3. Turn on the light switch or reconnect thepower to the lights.



T-8 Lamp Replacement (Canopy or Shelf)

WWAARRNNIINNGGShut off light switch or disconnect powersupply before changing a lamp. 600Vlighting system and/or ballast surges canburn out adjacent lamps and/or cause per-sonal injury or death.

NOTEUnplugging a shelf lamp will shut off allthe shelf lamps in that case section.Installing the receptacle cover in place ofthe lamp plug will complete the circuit andturn on the rest of the shelf lamps in thatcase section.

1. Pull down both end caps (1) to separatethem from lampholders (2).

2. Pull end caps (1) from ends of lamp (3)and/or lampshield (4). Remove lamp (3)from lampshield (4), where applicable.

3. Insert new lamp (3) in the lampshield (4),where applicable. Install end caps (1) onends of lamp (3) and/or fully seat in endsof lampshield (4).

4. Push up both end caps (1) into lamphold-ers (2) until they snap into place.

5. Turn on the light switch or reinstall shelflamp plug.

Remote Ballast Replacement

WARNINGShut off or disconnect power supply tocase before changing a ballast. 600V elec-trical power from wire ends could damageother components and/or cause personalinjury or death.

1. Disconnect and/or loosen canopy lightchannel (1) until it hangs down enough toprovide access to the light ballasts (2).

NOTE

Mark wires before removing to assureproper installation.

2. Disconnect wires (3) to defective ballast(2).

3. Remove mounting screws and defectiveballast (2) from light channel (1) or mount-ing bracket (4).

4. Install new ballast (2) on light channel (1)or in mounting bracket (4) and securewith mounting screws.

5. Connect wires (3) to new ballast (2) insame position as they were removed.

CAUTION

Make sure all wiring is tucked out of theway to prevent pinching and/or wire dam-age during light fixture installation.

6. Secure canopy light channel (1) in top ofcase.

7. Reconnect or turn on the power supply tothe case.



Fan Blade and MotorReplacement

WWAARRNNIINNGG

Shut off or disconnect power supply tocase before servicing a fan. Automaticcycling of fan or electrical power to wireends could cause personal injury and/ordeath.

5. Replace new fan motor assembly inreverse order.

Color Band and BumperReplacement

The bumper, hand rail/bumper retainer andcolor band attach together to form a singleassembly. To replace any part of this assem-bly, follow these procedures.

Color Band Replacement

1. Starting at one end, carefully pry top endof color band (1) from top of the handrail/bumper retainer (2).

2. Work top of color band (1) free from thefull length of hand rail/bumper retainer (2).

3. Lift color band (1) off top of bumper (3).Do not lose or misplace the color bandbacker (4) from behind the color band (1)joint area.

4. Position color band backer (4) behindjoint area between color bands (1) andinstall new color band (1) in reverse order.

NOTE

Color bands on glass front cases can onlybe removed by first removing the bumperand bumper retainer. These color bandsDO NOT snap out as is the method withnon-glass front cases! To replace theband, simply slip the band out of the glassretainer, replace and re-install band,bumper retainer and bumper.

Fan Blade Replacement

1. Remove bottom tray(s) (1) from case (2).

2. To replace fan blade (3), remove spring clip(4) and fan blade (3) from fan motor shaft(5). Discard spring clip.

3. Install new fan blade (3) on fan motor shaft(5) and secure with new spring clip (4).

4. Replace bottom tray(s) (1) in case (2).

Fan Motor Replacement

1. Remove bottom tray(s) (1) from case (2).

2. Remove three screws and mountingbrackets (6) and fan plenum (7).

3. Carefully lift fan motor assembly andunplug wire connector.

4. Remove three screws and mounting brack-ets (6) from fan motor (5).

NOTE

If replacement blades and/or motor are notavailable, unplug motor and cover openinguntil the replacement parts are available.



Bumper Replacement

NOTE

Make sure color band has been removedbefore replacing the bumper.

1. Push in on center of bumper (1) whilepulling out on bottom of bumper (1). Thiswill start to separate bumper (1) fromhand rail/bumper retainer (2).

2. Make sure the bottom of the bumper (1) isreleased from the hand rail/bumper retain-er (2) for the full length of the case.

3. After bottom is released, firmly pull outtop of bumper (1) to snap it free fromhand rail/bumper retainer (2).

4. Remove bumper backers (3) from bothends of bumper (1).

5. Install new bumper (1) in reverse order.

6. Install the color band (4) in the bumper(1) and bumper retainer (2).

Hand Rail/Bumper Retainer Replacement

NOTE

Make sure the color band and bumper havebeen removed before replacing the handrail/bumper retainer.

1. Mark position of the hand rail/bumper retain-er (1) on front of case (2).

2. Position hand rail backers (3) into ends ofhand rail/bumper retainers (1) not beingreplaced.

3. Remove mounting screws (4) and handrail/bumper retainer (1) from front of case (2).

NOTEHand rail/bumper retainer must be installed insame position as removed to assure properfit and alignment during installation.

4. Install new hand rail/bumper retainer (1) onfront of case (2) with mounting screws (4).

5. Position hand rail backers (3) to cover anyremaining space between adjoining handrail/bumper retainers (1).

6. Replace the bumper (5), color band (6) andend trim (7) (where applicable) on the handrail/bumper retainer (1).



Raceway Cover RemovalOn some straight front cases, raceway coversneed to be removed to provide electricalaccess.

1. Remove screws (1) and raceway coverretainers (2) from bottom section of race-way cover (3) that is being removed.

2. After all raceway cover retainers havebeen removed, rotate raceway cover (3)up and pull down to remove it from thelower cladding (4). NOTE: Additionalholding pressure may be required atcase joint to keep backer intact.

On high base cases, most meat and producecases, raceway access is gained by removingthe lower front cladding. Remove the screwsfrom the top of the lower cladding and slip outthe bottom tabs from the slots in the basesupports. Be sure to replace all screws whenre-installing the cladding!

Kickplate Removal

1. If removing kickplate from the end of acase lineup, remove three screws andslide out lower end close-off (1) frombetween bottom of patch end and casebase rail.

2. Grasp and pull top of kickplate (2) until itsnaps free from the kickplate support (3).

3. Rotate top of kickplate (2) down until bot-tom of kickplate (2) can be slid fromunder the kickplate support (3).

4. Remove kickplate backer (4) from end ofkickplate (2).

TYLER REFRIGERATION CORPORATION, hereinafter referred to as TYLER , warrants to theoriginal purchaser of the Equipment with the Model and Serial Number shown above, that saidEquipment, including all parts thereof, is free from defects in material and workmanship.TYLER S sole obligation under this warranty shall be limited to repairing or exchanging any partor parts, f.o.b. factory, which may prove defective within one year from date of original installa-tion (not to exceed one year and ninety days from date of shipment from the factory) and whichTYLER S examination discloses to be thus defective. All defective parts must be returned to theTyler factory of origin.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES. EXPRESSED OR IMPLIED,AND DOES NOT INCLUDE ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FIT-NESS FOR A PARTICULAR PURPOSE. TYLER SHALL NOT BE LIABLE FOR ANY CON-SEQUENTIAL OR SPECIAL DAMAGES, INCLUDING, BUT NOT LIMITED TO, LOSS OFFOOD PRODUCTS. LOSS OF PROFITS, LOSS OF REFRIGERANT, OR INJURY TO PER-SON OR PROPERTY CAUSED BY DEFECTIVE EQUIPMENT, MATERIAL OR PARTS.TYLER S SOLE LIABILITY SHALL BE LIMITED TO THE REPAIR OR REPLACEMENT OFANY DEFECTIVE PART OR PARTS AS ABOVE STATED AND SHALL NOT INCLUDELABOR OR OTHER EXPENSE INCURRED IN THE REMOVAL AND/OR INSTALLATION OFDEFECTIVE PARTS OR EQUIPMENT.

TYLER neither assumes, nor authorizes any person to assume for it, any other obligation or lia-bility in connection with said equipment or any part thereof.

IN ADDITION TO THE FOREGOING, THIS WARRANTY SHALL NOT APPLY:

1. To the Condensing Unit used with said Equipment unless same was furnished by TYLER.

2. When this Equipment or any part thereof is subjected to accident, alteration, abuse, misuse,tampering, operation on low or improper voltages, or is put to a use other than normally rec-ommended by TYLER.

3. To any product or part which shall have been repaired, altered or assembled in any way byother than TYLER. TYLER S supplier or TYLER S installation contract which, in the solejudgment of TYLER affects the performance, stability or purpose for which it was manufac-tured.

4. When this Equipment or any part thereof is damaged by fire, flood, act of God or when theoriginal model and serial number plate has been altered, defaced or removed.

5. When operation of this equipment is impaired due to improper drain installation.

6. Toward payment of any removal or installation charges of warranted parts.

7. When this Warranty Certificate has been altered in any way.

8. This Warranty is made to the original purchaser only and is not transferable.

This One-Year Warranty shall apply only within the boundaries of the continental United Statesand Canada and such other areas as are covered by specific agreement between the autho-rized Distributor and TYLER.

Refrigeration Corporation

One YearWarranty

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