technical training 2008

Technical Training 2008Technical Training 2008

TECHNICAL TRAINING TECHNICAL TRAINING

20082008

STATIC BLOWER STATIC BLOWER

ROOFTOPROOFTOP

Content

• IntroductionIntroduction

• FeaturesFeatures

• System & ControlSystem & Control

• InstallationInstallation

• Selection Process Selection Process

• TroubleshootingTroubleshooting

INTRODUCTIONINTRODUCTION

DUCTED BLOWERDUCTED BLOWER

Introduction

• Static BlowerStatic Blower (SB) (SB) – Ducted Fan Coil Unit – Ducted Fan Coil Unit

• Capacity range:Capacity range:

- Cooling: 7.5hp – 75hp

- Heatpump: 7.5hp – 60hp

Model Capacity Range (‘000 Btu/h)

75 100 125 150 200 250 300 350 400 450 500 600 750

R407C R407C R407C

Introduction

• Basic ConfigurationBasic Configuration

Supply Air

Return Air

Blower

Motor Drain Pan

Pulley

V-Belt

Introduction

• Draw-through Operation Draw-through Operation

Air Air

Draw-through Blow-through

Introduction

• SB series:SB series:

- Available in R22 & R407C

- Horizontal & Vertical air discharge

- Belt-Driven (for SB125 and above)

- Sequential Controller (for > 1 compressors

model)

- Phase Sequencer

- Wide range (7.5 – 75hp for cooling ; 7.5 –

60hp for heatpump)

Ducted Split Unit

• Indoor UnitIndoor Unit

SB75/100 B

SB75/100 D

SB75/100 BR

SB75/100 ER

SB125 C

SB125 CR

SB150 B

SB125/150 D

SB125/150 D2

SB125/150 ER

SB125/150 ER2

Ducted Split Unit

• Indoor UnitIndoor Unit

SB200/250/300 D2

SB400/500 D4

SB200/250 B2BR2

SB300/350 B3/BR3

SB400/500 BE/BR4

SB200/250/300 ER2

SB300/350/450 ER3

SB400/500/600 ER4

Introduction

• MSS-F seriesMSS-F series

- Horizontal air discharge

- Anti corrosion fin

- Outdoor motor protection – IP54

- Flexibility of service access

- Safety device protection • HP & LP switch

• Discharge thermostat

• Phase Sequencer

• Crankcase heater

• Compressor internal overload protection

Ducted Split Unit

• Outdoor UnitOutdoor Unit

MSS100/125 B

MSS100/125 BR

MSS75/100 C

MSS75 CRMSS75/100/125 F

MSS75/100/125 FR

75 100 125 150 200 250 300

Ducted Split Unit

• Outdoor UnitOutdoor Unit

MSS150 C

MSS75/100/125/150 D

(4)MSS75/100/125/150 ER

MSS200/250/300 D2

ROOFTOPROOFTOP

Introduction

• Basic Basic ConfigurationConfiguration

Supply Air

Blower

Drain Pan

Outdoor

Pulley

V-BeltMotor

Compressor

Return Air

Introduction

• Rooftop ARooftop A- Available in R22 or R407C

- No additional refrigerant work

- Horizontal side throw or vertical down throw

model)

- Phase Sequencer

- Capacity range: 5.5hp – 42hp

Rooftop A

• RT-ART-A

RT55 A

RT55 AR(4)RT60/80/100/120/150/200 A

(4)RT60/80/100/120/150/200 AR(4)RT250/300/360/420 A

(4)RT250/300/360/420 AR

55 60 80 100 120 150 200 250 300 360 420

Introduction

• Rooftop BRooftop B- Available in R22 only

- No additional refrigerant work

- Belt-Driven

model)

- Phase Sequencer

- Higher EER

- Netware III (RT60 only)

- Capacity range: 6hp – 18hp

Rooftop B

• RT-BRT-B

RT60 B

RT60 BRRT90 B

RT90 BR

RT120/150/180 B

RT120/150/180 BR

60 90 120 150 180

FEATURESFEATURES

Features

• Standard air Standard air discharge discharge configuration asconfiguration as

manufactured.manufactured.

• SB-B seriesSB-B series

Model Std. Air Throw Changeable?

SB75-100 B(R) Horizontal X

SB125 B Horizontal √

SB125 CR Horizontal X

SB150-200 B(R) Horizontal √

SB250-500 B(R) Vertical √

SB600-750 B Vertical X

Features

• SB-D seriesSB-D series

• SB-E seriesSB-E series

SB75-150 D Horizontal X

SB200-500 D Vertical √

SB75-150 ER Horizontal X

SB200 ER Horizontal √

SB250-500 ER Vertical √

SB600 ER Vertical X

Features

• RT-A seriesRT-A series

RT250/300 A(R) – FXAD : Vertical down throw RT250/300 A(R) – FXAD : Vertical down throw

• RT-B seriesRT-B series

RT55 A(R) Horizontal X

(4)RT60-200 A(R) Horizontal √

(4)RT250-300 A(R)* Horizontal X

(4)RT360-420 A(R) Horizontal X

RT60-180 B(R) Horizontal √

Features

• Come with SLM 3 for single Come with SLM 3 for single compressor compressor

modelmodel

• Come with Sequential Come with Sequential CController for > 1 ontroller for > 1

compressors modelcompressors model

Temperature set

SQ Controller

ON / OFF

Timer set

Operating Mode

Test Run

Heater

Operating Mode

Temperature set

ON / OFF

Timer Sleep

Features

Netware III

ON / OFF

Timer set

Operating Mode

Timer Active

Temperature set

Features

• SB-B seriesSB-B series

SB750 B does not come with controllerSB750 B does not come with controller

Handset PCB

SLM 3 SQ Controller Control Module

SB75-100 B(R) √ L2

SB125 B/CR √ U1SB125

SB150 B(R)2 √ SQ2.0

SB200-500 B(R) √ SQ2.0

SB600 B4 √ SQ2.0

SB750 B5* - - -

Features

• SB-D seriesSB-D series

• SB-E seriesSB-E series

Handset PCB

SB75-100 D √ L2

SB125-150 D √ U1SB125

SB125-300 D2 √ SQ2.0

SB400-500 D4 √ SQ2.0

Handset PCB

SB75-100 ER √ L2

SB125-150ER √ U1SB125

SB125-300 ER2 √ SQ2.0

SB300-600 ER √ SQ2.0

Features

• RT-ART-A series series

• RTRT--BB series series

Handset PCB

RT55 A(R) √ U1SB125

(4)RT60-120 A(R) √ U1SB125

(4)RT150-420 A(R) √ SQ2.0

Handset PCB

Netware 3 SQ Controller Control Module

RT60 B(R) √ U1SB125

RT90-180 B(R) √ SQ2.0

SYSTEM & CONTROLSYSTEM & CONTROL

System & Control

• L2 BoardL2 Board- Single compressor, 3 fan speed

• U1SB125 BoardU1SB125 Board- Single compressor, single fan speed

• SQ boardSQ board- Multi compressors, single fan speed

L2 / U1SB125L2 / U1SB125

L2 / U1SB125 Main Board

• L2L2

L2 Board

Connect to wired handset

To outdoor sensor

To room sensor

To indoor sensor

Mode of Selection

• Mode can be selected via the value of Mode can be selected via the value of

resistor RMODEresistor RMODE

MODES AUTO COOL DRY HEAT FAN RMODE ()AP X X X X X 3KAT X X X X X 22KEC X X X 110K

X : Modes availableX : Modes available

Features

• Compressor 9 minutes force ONCompressor 9 minutes force ON

• Memory backup: Auto Random RestaMemory backup: Auto Random Restart rt

• Cold Start / Hot Start / Hot KeepCold Start / Hot Start / Hot Keep

• Sleep functionSleep function

• Self – DiagnosticSelf – Diagnostic

• ProtectionsProtections

Auto Random Restart

• Auto random resAuto random restart with last stattart with last state e

memorymemory

• Shorted at JLST Shorted at JLST jumper at main bjumper at main boardoard

Power Up Settings

Power UpPower Up

JLST ShortedJLST Shorted JLST OpenedJLST Opened

Set Temperature = 24°CSet Temperature = 24°C

Unit = OFFUnit = OFF

Mode = COOLMode = COOL

Fan Speed = HighFan Speed = High

User Set ModeUser Set Mode

User Set TemperatureUser Set Temperature

User Set Fan SpeedUser Set Fan Speed

Sleep Function

COOLCOOL

HEATHEAT

Troom°C

1 2t (hr)

SLEEP set on SLEEP set off

1 2t (hr)Ts

SLEEP set on SLEEP set off

Troom°C ½

Self – Diagnostics

Error Power LED Timer LED Other LEDs Error Code

Room sensor open or short Blinks 1 time - Blinks Fan Blinks E1

Indoor coil sensor open Blinks 2 times

- Blinks Dry & Fan Blinks E2

Outdoor coil sensor open Blinks 3 times

- Blinks Dry Blinks E3

Compressor overload / ID coil sensor short / OD coil sensor short

Blinks 1 time Blinks Cool Blinks E4

Outdoor defrost - Blinks HEAT in SLM 3 -

Hardware error (tact switch pin short)

Blinks 6 times

Blinks Heat, Cool, follow by Fan Dry

Blinks E8

Hot Start / Hot Keep

• Hot StartHot Start

- ID fan depends on ID coil temperature User set speed – ID coil temperature > 40 °C

ID Fan Stop – ID coil temperature =< 18 °C

• Hot KeepHot Keep- ID fan depends on ID coil temperature

- 4 options

1. Fan Always ON option User set speed – ID coil temperature > 40 °C

ID Fan Low – ID coil temperature < 37 °C

2. Fan ON option at the start of Heat mode

User set speed – ID coil temperature > 40 °C

ID Fan Stop – ID coil temperature < 30 °C

For thermostat cut off

User set speed – ID coil temperature > 40 °C

ID Fan Stop – ID coil temperature < 18 °C

3. Fan OFF option

User set speed – ID coil temperature > 40 °C ID Fan Stop – ID coil temperature < 30 °C

4. Fan Low cycle ON & OFF option ID Fan cut in 30 seconds and subsequently cut off for

120 seconds

Protections

• CompressorCompressor- 3 minutes Minimum OFF Time

- 150 seconds Minimum RUN Time

- Overload ProtectionCOOL, AUTO COOL and DRYCOOL, AUTO COOL and DRY

OD coil tempOD coil temp

Comp & OD FanComp & OD Fan

68 68 o o CC

OFFOFF

HEAT, AUTO HEATHEAT, AUTO HEAT

ID coil tempID coil temp

Comp, OD FanComp, OD Fan& 4WV& 4WV

68 68 o o CC

OFFOFF

Protections

- Hardware Switch Detection A counter is increased by 1 during the first cycle of thermostat

The counter will be reset after 3 minutes

Declare E4 if counter > 5

• OD Fan speed control- Cooling OD Fan will run whenever the compressor is cut-in

- Heating

ID coil tempID coil temp

OD FanOD Fan

55 55 o o CC

OFFOFF

50 50 o o CC

Protections

• ID Coil Anti FreezeID Coil Anti Freeze- Cooling mode only

- ID temperature = 1 °C for at least 1 minute

- Compressor has been running for 10 minutes

1 1 ooCCComp & OD FanComp & OD Fan OFFOFF

10 10 ooCC

Comp & OD FanComp & OD Fan

OFFOFF

SQ2.0SQ2.0

Type of Models

• Cooling: Cooling: SQC2, SQC3, SQC4SQC2, SQC3, SQC4

• Heatpump:Heatpump: SQH22, SQH32, SQH22, SQH32,

• Heater:Heater: SQHT22, SQHT32, SQHT22, SQHT32, SQHT42SQHT42

• RT360/420AR:RT360/420AR: SQSIM01SQSIM01SQ C 2

Sequential Control

Cooling

No. of Comp

SQ H 2 2

Sequential Control

Heatpump

No. of Comp

No. of Heater

Mode of Selection

Configuration Value of R42 ()

Heatpump 2 comp 1k

Heatpump 3 comp 3.3k

Heatpump 4 comp 9.1k

Cooling/Heater* 2 comp 20k

Cooling/Heater* 3 comp 47k

Cooling/Heater* 4 comp open

DIP SW Configuration

1 & 2 No. of Heaters

3 & 4 Stage Differential Temperature

5 Auto Mode Selection

6 Hot Keep Option

7 & 8 Defrost Option

SQ Main Board

- Located in the indoor

- Signal to compressors, ID/OD fan, valve & auxiliary

heater with timer & protection

- Compressor relay cut off - H/L trip

- Manual reset button

ON / OFF Dry Contact

Connect to Wired

Handset

To high pressure switch

Dip SwitchTo outdoor sensor

Features

• Sequence ControlSequence Control

• Balance loading up to 4 compressorsBalance loading up to 4 compressors

• 7 days programmable timer7 days programmable timer

• Auto ModeAuto Mode

• Cold Blast / Spurt Heat / Hot Start / Cold Blast / Spurt Heat / Hot Start /

Hot KeepHot Keep

• Self – DiagnosticSelf – Diagnostic

• Energy SavingEnergy Saving

• ProtectionProtection

Sequence Control

• Cooling ModeCooling Mode

2 sec2 secStartStart Indoor FanIndoor Fan

Outdoor Fan 1Outdoor Fan 1

Compressor 1Compressor 1

15 sec15 sec

2 sec2 sec

Sequence Control

• Heating ModeHeating Mode

2 sec2 secStartStart Indoor FanIndoor Fan

15 sec15 sec

2 sec2 sec

All 4 way valvesAll 4 way valves2 sec2 sec

Heater 1Heater 115 sec15 sec

Heater 2Heater 2

Stage Differential Temperature Setting

1.51.5°C only valid for 2 & 3 compressors °C only valid for 2 & 3 compressors model.model.

For 4 compressors model, max 1.0°CFor 4 compressors model, max 1.0°C

Default SettingDefault Setting

Configuration SW3 SW4

0.5°C on off

1.0°C off on

1.5°C on on

Default off off

Model Diff. Temp. Setting

1 compressor Not applicable

2 compressors 1.5°C

Balance Loading

• Cooling ModeCooling Mode

Troom °C

Ts+1.5

Ts+1.0

Ts+0.5

Ts-0.5

Ts-1.0

1 comp on

2 comp on

3 comp on

4 comp on

All comp off

3 comp off

2 comp off

1 comp off

1.0°C

0.50.5°°C Differential TemperatureC Differential Temperature

Balance Loading

• Cooling ModeCooling Mode1.01.0°°C Differential TemperatureC Differential Temperature

Ts+3.0

Ts+2.0

Ts+1.0

Ts-1.0

1 comp on

2 comp on

3 comp on

4 comp on

All comp off

3 comp off

2 comp off

1 comp off

1.0°C

Troom °C

Balance Loading

• Cooling ModeCooling Mode1.51.5°°C Differential TemperatureC Differential Temperature

Ts+3.0

Ts+2.0

Ts+1.5

Ts-1.0

1 comp on

2 comp on

3 comp on

All comp off

2 comp off

1 comp off

1.0°C

Troom °C

Ts+0.5

Balance Loading

• HeatingHeating

Ts+1.5

Ts+0.51 comp on

2 comp on

3 comp on

4 comp on

4 comp off

3 comp off

2 comp off

1 comp off

1.0°CTs-0.5

Ts+1.0

Troom °C

Ts-1.0

Balance Loading

• HeatingHeating

Troom °C

Ts+1.5

Ts+0.5

Ts-2.5

1 comp on

2 comp on

3 comp on

4 comp on

4 comp off

3 comp off

2 comp off

1 comp off 1.0°CTs-1.5

Ts-0.5

Balance Loading

• HeatingHeating

Ts+1.5

Ts+0.5

Ts-2.5

1 comp on

2 comp on

3 comp on

3 comp off

2 comp off

1 comp off

1.0°CTs-1.5

Ts-1.0

1.51.5°°C Differential TemperatureC Differential TemperatureTroom °C

7 days Programmable Timer

• Real-Time Clock (RTC) need to be setReal-Time Clock (RTC) need to be set- Press “CLOCK” to activate Set Clock Mode

- Press “MINUTES”, “HOUR” & “DAY” to set time of

present day

- Press “CLOCK” again to deactivate the Set Clock Mode

• 7-Days Timer7-Days Timer- Press “ON TIMER” to activate auto-ON Timer Mode

- Press “MINUTES”, “HOUR” & “DAY” to set time of the

week for automatic start running

- Press “ON TIMER” again to save the setting

7 days Programmable Timer

- Press “OFF TIMER” to activate auto-OFF Timer Mode

- Press “MINUTES”, “HOUR” & “DAY” to set time of the

week for automatic stop running

- Press “OFF TIMER” again to save the setting

Press the “HOLD” key for 2-3 seconds until the word “TIMER ACTIVE” appears on thePress the “HOLD” key for 2-3 seconds until the word “TIMER ACTIVE” appears on the

LCD screenLCD screen..

Auto Mode

• Operating mode depends on TOperating mode depends on Trr (Roo (Roo

mmtemperature & Ttemperature & Tss (Set temperature) (Set temperature)

Current Mode

Tr < = Ts – 2.5 oC

Compressor Cut – OUT Time >= 15 mins

Conditions Next Mode

COOLCOOL HEATHEAT

HEATHEAT

Current Mode

COOLCOOLTr < = Ts + 2.5 oC

Compressor Cut – OUT Time >= 15 mins

Auto Mode

• 0.5 0.5 °C Differential TemperatureC Differential Temperature

Ts-1.0°

Ts-0.5°

Ts-1.5°

CoolCool

Ts+0.5°

Ts+1.0°

Ts+1.5°

1 comp on

2 comp on

3 comp on

4 comp on

3 comp off

2 comp off

1 comp off

Troom °C

1 comp on

Ts+2.0°

Ts+2.5°

2 comp on

3 comp on

4 comp on

1 comp off

2 comp off

3 comp off

all comp off

HeatHeatTs-2.0°

Ts-2.5°

Auto Mode

CoolCool

HeatHeat

Ts+1.0°

Ts+2.0°

Ts+3.0°

Ts-1.0°1 comp on

2 comp on

3 comp on

4 comp on

3 comp off

2 comp off

1 comp off

Troom°C

Ts-4.0°

Ts-3.0°

Ts-2.0°

1 comp on

Ts+4.0°

2 comp on

3 comp on

4 comp on

1 comp off

2 comp off

3 comp off

all comp off

Auto Mode

CoolCool

HeatHeat

Ts+1.0°

Ts+2.5°Ts+3.0°

Ts-1.0°1 comp on

2 comp on

3 comp on

2 comp off

1 comp off

Troom°C

Ts-4.0°

Ts-3.0°Ts-2.5°

1 comp on

Ts+4.0°

2 comp on

3 comp on

1 comp off

2 comp off

all comp off

Ts+1.5°

Ts-1.5°

Cold Blast / Hot Spurt

• Cold BlastCold Blast- Working Set Temperature = User Set

Temperature - 2 °C

- Conditions remain until:

ALL compressor cut OFF

At least 1 compressor CUT-IN > 20 minutes

- Not available during Energy Saving or Auto Mode

Cold Blast / Hot Spurt

• Hot SpurtHot Spurt- Working Set Temperature = User Set

Temperature + 2 °C

- Conditions remain until:

ALL compressor cut OFF

At least 1 compressor CUT-IN > 20 minutes

- Not available during Energy Saving or Auto Mode

• Hot StartHot Start- Conditions: At least 1 compressor CUT-IN

- ID fan depends on ID coil temperature

ID Fan Run – Any ID coil temperature >= 30 °C

ID Fan Stop – Any ID coil temperature =< 15 °C

• Hot KeepHot Keep- ALL compressor CUT-OUT / STOP

- ID fan depends on ID coil temperature

ID Fan Run – Any ID coil temperature >= 40 °C

ID Fan Stop – Any ID coil temperature =< 15 °C

Self - Diagnostics

E01E01 Req. manual resetReq. manual reset E19E19 I/D coil sensor 4 shortI/D coil sensor 4 shortE02E02 Comp. 1 h/temp.(O/L)Comp. 1 h/temp.(O/L) E20E20 I/D coil sensor 1 openI/D coil sensor 1 openE03E03 Comp. 2 h/temp.(O/L)Comp. 2 h/temp.(O/L) E21E21 I/D coil sensor 2 openI/D coil sensor 2 openE04E04 Comp. 3 h/temp.(O/L)Comp. 3 h/temp.(O/L) E22E22 I/D coil sensor 3 openI/D coil sensor 3 openE05E05 Comp. 4 h/temp.(O/L)Comp. 4 h/temp.(O/L) E23E23 I/D coil sensor 4 openI/D coil sensor 4 openE06E06 Comp. 1 h/pre tripComp. 1 h/pre trip E24E24 O/D coil sensor 1 shortO/D coil sensor 1 shortE07E07 Comp. 2 h/pre tripComp. 2 h/pre trip E25E25 O/D coil sensor 2 shortO/D coil sensor 2 shortE08E08 Comp. 3 h/pre tripComp. 3 h/pre trip E26E26 O/D coil sensor 3 shortO/D coil sensor 3 shortE09E09 Comp. 4 h/pre tripComp. 4 h/pre trip E27E27 O/D coil sensor 4 shortO/D coil sensor 4 shortE10E10 Comp. 1 L/pre tripComp. 1 L/pre trip E28E28 O/D coil sensor 1 openO/D coil sensor 1 openE11E11 Comp. 2 L/pre tripComp. 2 L/pre trip E28E28 O/D coil sensor 2 open O/D coil sensor 2 open E12E12 Comp. 3 L/pre tripComp. 3 L/pre trip E30E30 O/D coil sensor 3 openO/D coil sensor 3 openE13E13 Comp. 4 L/pre tripComp. 4 L/pre trip E31E31 O/D coil sensor 4 openO/D coil sensor 4 openE14E14 Room sensor shortRoom sensor short E32E32 Comp. 1 de-iceComp. 1 de-iceE15E15 Room sensor openRoom sensor open E33E33 Comp. 2 de-iceComp. 2 de-iceE16E16 I/D coil sensor 1 shortI/D coil sensor 1 short E34E34 Comp. 3 de-iceComp. 3 de-iceE17E17 I/D coil sensor 1 short I/D coil sensor 1 short E35E35 Comp. 4 de-iceComp. 4 de-iceE18E18 I/D coil sensor 1 shortI/D coil sensor 1 short

Error Error

CodeCode

Error Error

CodeCodeDescriptionDescription DescriptionDescription

Energy Saving

COOLCOOL

HEATHEAT

Troom°C

1 2t (hr)

Energy Saving on Energy Saving off

1 2t (hr)Ts

Energy Saving on Energy Saving off

Troom°C

Protections

• Compressor High PressureCompressor High Pressure

- Any compressor has High Pressure Trip Error code displayed in LCD (E06/07/08/09)

Compressor does not CUT-IN for 3 minutes

- 3 times trip within 30 minutes, auto restart is not

possible

• Compressor High TemperatureCompressor High Temperature- Cool and Auto Cool Modes OD coil temperature for a particular compressor > 68 °C

This compressor and its OD fan will STOP.

ID fan continue to run.

Protections

• Compressor Trip / Low RefrigerantCompressor Trip / Low Refrigerant - Minimum 5 minutes run time

- Tr – TIDcoil =< 3 °C

• ID Anti-Freeze Protection & Filter CheckID Anti-Freeze Protection & Filter Check- ID coil temperature =< 1 °C for at least 1 minute

- Compressor run time >= 10 minutes

- Compressor & OD Fan STOP Restart is possible only after

1. Minimum 3 minutes stop time 2. ID coil temperature >= 12 °C for at least 1 minute

3. Another operation mode is selected

Protections

• Defrost condition will be met if:Defrost condition will be met if:

1hr0 2hrs

30’Time

To °C

Defrost mode if more than 3 minutes

Protections

• Defrost will terminate if:Defrost will terminate if:- OD coil temperature > +10 °C or

- Maximum 10 minutes compressor run time

Maximum 20 minutes compressor run time for SQSIM01 boardMaximum 20 minutes compressor run time for SQSIM01 board

Installation

Ducted Split System

Main components: - a. Finned-tube heat exchanger coil (direct expansion)b. Drain panc. Blower fan and pulleyd. Drive motor and pulleye. V-beltf. External steel casing

7.5 hp – 75 hp (Cooling)7.5 hp – 50 hp (Heatpump)

Ducted Split System

7.5 hp – 10 hp Capacity

1) Motor direct coupled to blower fan2) No v-belt and pulleys

Ducted Split System

SB units can be installed in several ways depending on the duct system

Free return, Ducted supply

a) Ceiling space return

b) Plant room return

Free return, Ducted supply

Ducted Split System

Ducted return, Ducted supply

Drain Pipe Installation

Note: SB is a draw-through unit, internal volume experience negative pressure, warm air may infiltrate into the unit, reduce cooling capacity

1) Prevent water leakage at pipe joint

2) Prevent air leakage through the drain pipe

• Drain trap when hung from the ceiling

Water accumulate and form U-trap to prevent air form being sucked into the unit

Height h required to maintain this trap depend on the internal static pressure of the unit

• Drain trap when installed on the floor

Note: Height h required to maintain this trap depend on the internal static pressure of the unit

Note: Do not allow the trap loop to be higher than the drain hole position of the unit

Vertical Throw

Horizontal Throw

Ducted Split System

Horizontal and vertical throw Convertible

Ducted Split System

Standard Air ThrowStandard Air Throw

Std Air Throw Changeable?

MDB75B/D Horizontal NO

MDB100B/D Horizontal NO

MDB125B Horizontal YES

MDB125D Horizontal NO

MDB150D Horizontal NO

MDB200D Vertical YES

MDB250-500B/D Vertical YES

MDB600-750B Vertical Yes*

Horizontal & Vertical ThrowHorizontal & Vertical Throw

Example of installation requiring a change in the air throw configurationExample of installation requiring a change in the air throw configuration

1)1)Supply air duct in the plant room is Supply air duct in the plant room is located at low level on the walllocated at low level on the wall

2)2) Supply air duct is ducted downwards Supply air duct is ducted downwards to the rooms belowto the rooms below

Example of installation requiring a change in the air throw configurationExample of installation requiring a change in the air throw configuration

Changing Air flow configurations (Horizontal to Vertical)Changing Air flow configurations (Horizontal to Vertical)

1)1) Remove blower flangeRemove blower flange

2)2) Remove blower coverRemove blower cover

3)3) Exchange blower flange and blower cover positionsExchange blower flange and blower cover positions

4)4) Remove side panel and service panel to access blower fanRemove side panel and service panel to access blower fan

5)5) Remove V-belt from blower pulleyRemove V-belt from blower pulley

6)6) Remove the bolts holding the blowerRemove the bolts holding the blower

7)7) Rotate the blower 90°to the new positionRotate the blower 90°to the new position

8)8) Remove the motor and rotate the bracket by Remove the motor and rotate the bracket by 180°(place back motor)180°(place back motor)

9)9) Realign motor pulley and blower pulley, replace V-beltRealign motor pulley and blower pulley, replace V-belt

Note: Distance is larger for vertical configurationsNote: Distance is larger for vertical configurations

10) Place back panels and blower back to the flange10) Place back panels and blower back to the flange

Horizontal & Vertical Horizontal & Vertical ThrowThrow

Roof Top

1) Roof Top units have ranges from 6 hp – 42 hp

Supply Air

Blower

Drain Pan

Outdoor

Pulley

V-BeltMotor

Compressor

Return Air

Installation site

Methods of installation

• cushioned by rubber pads and seated on flat platform.

• seated on isolator springs mounted on concrete / steel structures.

Installation site

• Concrete plinth must be bigger footprint

Installation site

• Isolator springs for low vibration levels

Installation site

Note: Roof shaft is made to specified size (Refer Figure 1-4 for air supply and return flange dimension)

Installation site

• Selection of spring isolator based on unit weight distribution at the 4 corners.

Installation site

• Good practices

• install roof top unit as far away possible from source of vibration.

• size isolator to correct stiffness, taken into consideration

• shock loads during start-up and shutdown

• static deflection

• isolators should be equally loaded and installed on level ground.

• diameter of isolator should be greater than compressed height and occupy wide footprint for stability.

• isolators should not be fully compressed

Installation site

Installation Clearances

RT60/80/100/120A(R)RT60/80/100/120A(R) RT150/200A(R)RT150/200A(R)

Installation Clearances

RT250/300A(R)RT250/300A(R) RT360/420A(R)RT360/420A(R)

• Drain trap when installed on the floor

Note: Height h required to maintain this trap depend on the internal static pressure of the unit

Correct Not Correct

Ducting

• All rooftop unit comes with 2 metal flanges

Ducting

• For vertical air supply, recommended as shown

Ducting

• Roof Top unit is connected to the duct through canvas joint to prevent vibration from the blower startup to be transmitted to the air duct

Canvas Joint Filter Slot

Ducting

Fresh air intake can be taken in through a branch-out duct from the air return duct. Fresh air intake is about 10 – 15 %

Ducting

For RT80/100/120/150/200A(R),For RT80/100/120/150/200A(R),conversion from side flow to down flow is possible.conversion from side flow to down flow is possible.

DuctingFor RT80/100/120/150/200A(R),For RT80/100/120/150/200A(R),conversion from side flow to down flow is possible.conversion from side flow to down flow is possible.

Vertical

Horizontal

Rooftop reconstruction from down flow to side flow

1. Unscrew top panel

2. Remove top panel

3. Unscrew service panel

4. Remove service panel

5. Loosen motor base

6. Slide up the motor base

7. Remove the V-belt

8. Unscrew the casing leg

9. Insert rubber sheet to protect coil assembly

Rubber sheet

10. Unscrew fan assembly

Unscrew

11. Remove fan assembly & remove casing leg

Casing Leg

12. Fan assembly

13. Unscrew & remove supply air cover (top)

14. Unscrew & remove side inlet cover (bottom)

15. Low intake

16. Cover low intake with low cover

17. Tighten low cover

18. Inlet duct

19. Cover the inlet duct with supply air cover

20. Tighten supply air cover

21. Install the fan assembly

22. Install the V-belt & tighten the motor base

23. Fix duct flange (bottom)

24. Fix duct flange (top)

25. Fix service (side) panel

26. Fix top panel

Drive Package Selection

Pulley & Belt

• Belt driven (Roof Top & Static Blower) • Motor rotates at a higher speed compare to blower

Dm / Db = Nb / Nm --------------- Equation 1

L ~ 2C + 1.57(Db + Dm) --------------- Equation 2

Pulley & Belt

Example 1 (Motor & Pulley)

Given Dm = 5” and Db = 10”Nb = 800 rpm

Calculate Nm

Nm = (Db / Dm)*Nb = (10/5)*800 = 1600 rpm

Pulley & Belt

Example 2 (V-belt Length)

Given Dm = 7” and Db = 10”C = 28”

Calculate L

L ~ 2C + 1.57(Db / Dm) ~ 2(28) + 1.57(10+7) = 82.69”

Note: The slack of the belt can be adjusted by tensioning the motor bracket

Pulley & Belt

• Blower curves available in technical manual

SB200BSB200B SB300BSB300B

• Blower curves available in technical manual

RT60A(R)RT60A(R) RT80A(R)RT80A(R)

Pulley Data (Ducted Blower)

Range of Operation

1. Ability of motor drive to deliver the required power input to the blower

2. Prevention of frost forming-low load

3. Prevention of compressor tripping in heating mode

Pulley Data (Roof Top)

Example

Model: SB250D2Supply Air Quantity: 8000 CFMExternal Static Pressure: 29 mmAq

Step 1

Total Static Pressure = 46.5 mmAqInternal Static Pressure = 26 mmAqExternal Static Pressure = 20.5 mmAq

ESP 20.5 did not fulfill design requirement

Step 2

At 8000 CFM and 29 mmAq

Total Static Pressure = Internal Static Pressure + External Static Pressure= 26 mmAq + 29 mmAq= 55 mmAq

Design requirement needs 850 rpm, unit deliver about 700 rpm under same CFM

Step 3

Motor Pulley Size, Dm = 95 mmBlower Pulley Size, Db = 180 mmMotor RPM = 1440

To obtain 850 rpm new blower pulley is needed

New blower pulley size Db = Motor Pulley Size x (Motor rpm / Blower rpm)= 95 x (1440/850)= 161 mm

Select blower pulley size of 160 mm

Blower rpm = Motor rpm x (Motor Pulley Size / Blower Pulley Size)= 1440 x (95/160)= 855 rpm

Step 4

V-belt length must be rechecked. (Horizontal air throw)

L ~ 2C + 1.57(Db + Dm) ~ 2(580) + 1.57(95 + 160) = 1560.35 mm

Thus we can use belt with length of 1600 mm

where, C = distance between centre of the two pulleys

Db = diameter of blower pulley

Dm = diameter of motor pulley

Step 5

Motor power input about 3.5 kW, applying safety factor of 1.2 to account for losses= 3.5 × 1.2 = 4.2 kW (Select 5.5 kW motor)

Summary i) Motor = 5.0 kWii) Motor pulley size = 160 mmiii) V-belt size = 1600 mm

Step 1

ExampleModel: RT100ASupply Air Quantity: 3800 CFMExternal Static Pressure: 150 Pa

Step 2

Total Static Pressure = Internal Static Pressure + External Static Pressure= 150 Pa + 150 Pa= 300 Pa

Design required point

1) 1200 rpm 2) motor output power below 1.5kW

Step 3

Motor Pulley Size, Dm = 114 mmBlower Pulley Size, Db = 152 mmMotor RPM = 1080

Note: To obtain required rpm 1200, calculate new blower pulley while maintaining the motor pulley.

New blower pulley size Db = Motor Pulley Size x (Motor rpm / Blower rpm)= 114 x (1080/1200)= 103 mm

Select blower pulley size of 100 mm

Blower rpm = Motor rpm x (Motor Pulley Size / Blower Pulley Size)= 1080 x (114/100)= 1231 rpm

Step 4

V-belt length must be rechecked.

L ~ 2C + 1.57(Db + Dm) ~ 2(184) + 1.57(114 + 100) = 703.98 mm

Step 5

Motor power input has maintained within the current operating range of the standard unit's motor.

Summary i) Motor = 1.5 kWii) Motor pulley size = 100 mmiii) V-belt size = 704 mm

Pulley Selection

• 2 types of recommended pulleysstandard V – pulleystaper lock pulleys

Standard V – pulleysrecommended NBK, Japan B – type (B1 & B2)

Pulley Installation

Insert the bore thru the shaft of motor / blower

Using a mallet, slowly knock the pulley into shaft

Insert rectangular key into keyway to secure pulley.

Tighten the Allen key onto the shaft key

Motor & Blower Size and Key Dimensions

General Troubleshooting

Troubleshooting

Noisy Operation

Type of noise - air noise- motor sound / vibration?

Source of Noise - indoor- worn bearing- loose / belt alignment- air too strong / high surface velocity- parts vibration

source of noise - outdoor- loose part - refrigerant overcharge- low suction pressure- condenser air flow- rubber absorber at the condenser base- partially clogged (system)

Common causes of mechanical compressor failure

1) Refrigerant flood back2) Flooded start3) Slugging4) Overheating5) Loss of Oil

Refrigerant flood back

DetailLiquid refrigerant flow through the suction line during operation

Possible CauseLow evaporator load (poor heat transfer / lack of air circulation)

PreventionProper air flow; proper refrigerant charge

Overheating

DetailOil in compressor is heated to the point where it loses it’s ability to lubricate, breakdown oil chemically

Possible CauseHigh compression ratios (low suction pressure / high discharge pressure)

PreventionEnsure no blockages in system - loss of refrigerant charge; hot air short circuit

Loss of Oil

Possible CauseOil pump out during start up; no / little return; improper trap; poor piping

SymptomsExcessive noise / vibration; high ampere

PreventionProper pipe design – traps / minimum riser; correct pipe size and correct charge

Thank YouThank You

technical training 2008

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