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South African Post Office

MAINTENANCE AND REPAIRS TO AIR CONDITIONING SYSTEM

SPECIFICATIONS 1 GENERIC SPECIFICATION

1.1 The scope of work for the maintenance of air conditioners is as follows:

No Description

1.1.1 All periodical service shall not be less than at industry acceptable intervals and specific

timeframes should be submitted with the bid.

1.1.2 Maintenance records must be kept (format of maintenance record shall be submitted with

the bid)

1.1.3 Attend to all the repairs and replacements to avoid any failure of the system within the

time period as indicated under “response times”

1.1.4 Where the supplier does not attend to SAPO’s repair requirements, SAPO reserves the

right to rectify the fault through requesting the services of another bidder.

1.1.5 Details of types and capacities of air conditioners installed at relevant SAPO buildings are

provided with this bid document for pricing on a rate per unit type and capacity basis.

For pricing on a per location basis for larger buildings, specific make and model

information is attached.AActivities



1. DETAIL SPECIFICATION MAINTENANCE OF AIR CONDITIONERS

Maintenance of air conditioners detailed specification

General property information:

Site

SA Post Office Head Office

Brief property description (type and number of buildings, and their use)

Offices

Total property size 18,002 m²

Name and physical address of building 350 Witch Hazel Ave, Eco Park

2.1 HVAC INSTALLATION

Block A, B & C

Buildings are air conditioned by inverters/midwall split units. Some condensers connected to ground floor evaporators are mounted in the basement on the galvanized steel brackets at a higher level and other compressors are on the roof. The condensers serving units on the first floor are secured on the concrete plinths on the roof of the building. Unit are controlled by remote controllers and the BMS.

NCC auditorium

The auditorium is air conditioned by four ducted in ceiling hide-away DX split units. Two outdoor units are mounted in the basement on the galvanized steel brackets at a higher level and the other two are placed on the roof. Each indoor unit is operated by means of the wired remote controller.

Preventative maintenance

Indoor unit

Fully clean and deodorise filters and indoor housing



Schedule of equipment

Area

Description Quantity Capacity (kW)

Building A

UPS room basement Midwall split unit 1 8.7

Patch room 1 Ground Floor Midwall split unit 1 2.6


Patch room 1 First Floor Midwall split unit 1 2.6


UPS room Basement Midwall split unit 2 8.7

Security Control room Midwall split unit 1 3.5

Check supply and return air temperatures

Check evaporator drain

Clean indoor coils

Outdoor unit

Inspect outdoor coil; and clean it

Check condenser fan for any obstruction

Check refrigerant levels

Check pipe insulation, replace if necessary

Check condenser levels



Security Ops room Midwall split unit 1 8.7

Offices Inverters/split walls 53 Various

Building B







Building C




Sapo Restaurant Manager Cassette split unit 1 2.6

Kitchen Office Midwall split unit 1 2.6



NCC auditorium In ceiling hide-away split

4 10.5

NCC offices In ceiling hide-away split

1 17.6



2.2 VENTILATION

Kitchen canopy ventilation

The kitchen is mechanically ventilated by means of a kitchen extract canopy and a fresh air make up system.

Fumes are extracted via a canopy, fan and ducted system, and discharges the air into the atmosphere.

The fresh air system is mechanically ventilated. Fresh air sucked through a weather louvre and filters by a fan and forced into a ducting system and discharged into the kitchen area via fresh air grilles.

The canopy fans are controlled via a start/stop switch located near the canopy.

Fresh air

The fresh air system is mechanically ventilated. Fresh air is sucked through a weather louvre and filter by a fan and forced into an area served via fresh air grilles.

The fans are connected to the electrical distribution board and runs 24 – hours a day 7days a week. When there is a fire signal the fresh air fans automatically switch off.


Fans

Monthly

V-belts to be checked for correct tension and alignment, replace if necessary (if

applicable)

Drive pulleys on both fan and motor to be checked and tightened (if applicable)

Impeller hubs to be checked for tightness and tighten if necessary (where




Fans

Code Type Make Model Air Flow @ Pressure

No. off

FA1 Kitchen Axial Flow Fan

Donkin MAJAX 2

630.20.D.4

5750 l/s @ 400Pa

1

FA2 Kitchen Axial Flow Fan

Donkin MAJAX 2 5000 l/s @ 300Pa

1

accessible)

Flexible connections to be checked and air leaks rectified.

Casing and holding down bolts to be checked for corrosion and security

Check for undue noise and vibration

Check security of fan belts on shaft and tighten if required (where applicable)

Clean fresh air filters where applicable

Six monthly

All ferrous metal components to be examined, corrosion removed treated and

repainted to prevent further corrosion.

Check motor starter and run up speeds

Check motor support bolts on pedestal

Check drive belts and replace as necessary (where applicable)

Check wear on fan blades

Clean blades of dirt accumulation

Repeat monthly check



630.20.D.4

FT1 Security Tube Fan System Air K150M 30 l/s 2

FA2 Locker room

Plate Mounted

Axial

AMS SCP 500 4 3 315 l/s @ 150Pa

2

2.3 Refrigeration installation

Cold and Freezer room

The cold and freezer rooms are cooled by a split type cold / freezer room unit. Air is passed over a cooling coil in the cold /freezer room cooling down to the preferred temperature.

The cold and freezer room units have a thermostat situated in the cold / freezer room that automatically maintains the temperature at the desired set point.


Cold / Freezer room units

Monthly

Check cooling operation

Check fan and fan motor operation

Check condensate drains for obstruction

Test thermostat and control operation

Generally clean equipment externally

Operate unit and check all functions. Advise client of any malfunctions.

Six monthly

Check compressor and gas pressure

Clean condensate pans and drains




Code Description Make Cooling Electric Heating

No. off

Cold room Cold room unit

Kovco 4.5kW - 1

Freezer room

Freezer room unit

Kovco 12kW - 1

2.4 Server room

Air conditioning

The server room is cooled by two Down Blow Server Room Units. Warm air is drawn from the room over the unit coil and cooled down before being blown back into the room cooling the servers.

The server room units are controlled by a control keypad situated in the unit.



repainted with Techtyl or similar to prevent further corrosion.

Report any malfunctions to client

Repeat monthly service checks

Server room units

Monthly

Clean filters

Check heating and cooling operation

Check fan and fan motor operation




Code Description Make Model Cooling Heating No. off

Server room units

Airedale DF80AD 71.7kW - 2

2.5 Fresh air systems

Fresh air systems: Ground and First floor

The fresh air systems are mechanically ventilated via AXIAL FLOW fans. The AXIAL fan sucks in air from the atmosphere through a washable pleated filter and disperses it into the ceiling void.

Fans are controlled via BMS system.


Check condensate drains for obstruction

Test thermostat and control operation

Generally clean equipment externally

Operate unit and check all functions. Advise client of any malfunctions.

Six monthly

Check compressor and gas pressure

Clean condensate pans and drains


repainted with Techtyl or similar to prevent further corrosion.

Report any malfunctions to client

Repeat monthly service checks

Fans




Building Name Type Model No. off

Block A FT1 IN LINE AXIAL FLOW FAN

AP0312AP5/.55 4

Block B FT1 IN LINE AXIAL FLOW FAN

AP0312AP5/.55 4

Block C FT1 IN LINE AXIAL FLOW FAN

AP0312AP5/.55 4

PRICING

Monthly

Impeller hubs to be checked for tightness and tighten if necessary (where

accessible)

Casing and holding down bolts to be checked for corrosion and security

Check for undue noise and vibration

Clean fresh air filters where applicable

Six monthly


repainted to prevent further corrosion.

Check motor starter and run up speeds

Check motor support bolts on pedestal

Check wear on fan blades

Clean blades of dirt accumulation

Repeat monthly check



Item Quantity Price VAT Annual Price

Monthly air conditioning service

5 R R R

Six monthly air conditioning service

1 R R R

Total cost R R R

General

Components and parts replacements

Total % mark-up including handling cost

…………..%



DULE OF KEY PERSONNEL EXPERIENCE

Information provided in this section will be used to evaluate bidder’s key personnel capability in relation to the Maintenance of air conditioners

No.

Name and Surname Designation

Employment Status

Highest Relevant Qualification Number of Years

Relevant Industry

Experience

Membership / Accreditation

Full Time

Temp (provide contract end date)

Qualification Name Certificate Number

Association / Professional

Body

Membership / Registration

Number

1

2

3

4

ADDITIONAL INFORMATION NEEDED FOR KEY PERSONNEL’S EXPERIENCE EVALUATION

(i) Curriculum Vitae (s) (ii) Certified Copies of Identity Documents (iii) Highest Relevant Qualification (iv) Professional Body’s Membership Certificates NOTE: Attach additional pages should the space provided be insufficient.



SCHEDULE OF COMPANY EXPERIENCE

Information provided in this section will be used to evaluate bidders experience in successful execution of maintenance of air conditioners projects.

No. Company /

Project Name Project Start

Date Project

End Date

Project

Duration

Project/ Contract Amount

Reliable References

Contact Person (Name & Surname)

Telephone Number Email

1

2

3

4

5

6

NOTE: Attach additional pages should the space provided be insufficient.