INSTALLATION & COMMISSIONING

Technical Training 2007Technical Training 2007

INSTALLATION & INSTALLATION & COMMISSIONINGCOMMISSIONING


5WSS 5WSS InstallationInstallation

• Hanging the UnitHanging the Unit

• Location ConsiderationsLocation Considerations

• Refrigerant PipingRefrigerant Piping

• Water PipingWater Piping

• Cleaning & Flushing SystemCleaning & Flushing System


Hanging the UnitHanging the Unit



• Recommend to use Recommend to use Rubber isolatorRubber isolator on the brackets to reduce on the brackets to reduce

noise and vibration transmissions noise and vibration transmissions


Location ConsiderationsLocation Considerations

1. Provide recommended service clearance to assure easy 1. Provide recommended service clearance to assure easy access for:access for:

• Water pipingWater piping

• Electrical connectionsElectrical connections

• Periodic maintenance and occasional servicePeriodic maintenance and occasional service

2.Recommended location (sound emission is outside the occupied space):

• Corridor

• Bathroom

• Special Room for Air-Conditioning Unit


Refrigerant PipingRefrigerant Piping

Three major things to be concerned:Three major things to be concerned:• Piping LengthPiping Length

• ElevationElevation

• No. of bendsNo. of bends

Choose shortest path

Follow the recommended data in the table (Installation Manual)


Refrigerant PipingRefrigerant Piping


Refrigerant PipingRefrigerant PipingAdditional Charges for 5WSS Additional Charges for 5WSS

unitunit

• The pre-charged of R410A in The pre-charged of R410A in the 5WSS unit is suitable for the 5WSS unit is suitable for Standard Standard

pipe of length up to:pipe of length up to:

– 2 meter for 2 meter for 5WSS10/15/20/25/30/40/50 5WSS10/15/20/25/30/40/50 ARAR

– 5 meter for 5WSS60AR5 meter for 5WSS60AR

• When the piping is more than When the piping is more than the standard pipe length, the standard pipe length, please add accordinglyplease add accordingly


Water PipingWater Piping



• Males couplings, BSPPMales couplings, BSPP

• no pipe insulation required no pipe insulation required

Water IN

Water OUT



Flexible hoseFlexible hose

• To ease water pipe installationTo ease water pipe installation

• Steel reinforced PVC hose with 2 female BSPP couplings at Steel reinforced PVC hose with 2 female BSPP couplings at the end.the end.

• Use O-rings provided to have a leak-proof jointUse O-rings provided to have a leak-proof joint

Female couplings



Pressure gauge

Water Inlet

Water Outlet

Gate Valve

Strainer

Automatic Shut-off

Valve

Flexible joint

Thermometer

Balancing Valve

WSS Unit


Cleaning and Flushing SystemCleaning and Flushing SystemSystem must be cleaned and flushed

Close all air vents after filling

Fill with water and open all air vents

Individual supply and return pipes connected first

Drains at the lowest point open

Check piping leaking

Check all air vents in sequence to bleed off any trapped air

Short-circuited connection to the supply and return pipes removed

Open all the drains and vents to complete drain down

Water valves set to make up for the required flow rate


Operating RangeThe operating range for EWT The operating range for EWT

is 12°C to 45°C.is 12°C to 45°C.

Rated Conditions:Rated Conditions:

Cooling Cooling

Ambient (DB/WB) : 27°C/19°C Ambient (DB/WB) : 27°C/19°C

Water IN: 30°C Water IN: 30°C Water OUT: 35°CWater OUT: 35°C

Heating:Heating:

Ambient (DB) : 20°CAmbient (DB) : 20°C

Water IN: 20°CWater IN: 20°C


WH InstallationWH Installation

• Hanging the UnitHanging the Unit

• Location of HangingLocation of Hanging

• DuctworkDuctwork

• Water PipingWater Piping

• DrainageDrainage

• Cleaning & Flushing SystemCleaning & Flushing System



Hanger threaded rods

Bolted to underside of ceiling slab



• Recommend to use Recommend to use vibration isolatorsvibration isolators on on

the brackets to reduce noise and vibration the brackets to reduce noise and vibration

transmissions transmissions

• Spring isolatorSpring isolator to be used for better vibration to be used for better vibration

control.control.

spring

bottom washer

PVC tube

Upper washer, welded onto bracket

nut

bracket



• Spring kit installation Spring kit installation

- Insert the threaded rod through the bracket- Insert the threaded rod through the bracket

- Insert the rod through the piece of soft PVC - Insert the rod through the piece of soft PVC

plastic tube. The tube will go through the plastic tube. The tube will go through the

mounting hole on the bracketmounting hole on the bracket

- Insert the spring over the plastic tube- Insert the spring over the plastic tube

- Screw in the bottom washer and locking nut- Screw in the bottom washer and locking nut

Spring Length Nominal load Deflection Natural frequencyModel (mm) (kg) (mm) (Hz)WH11-20B/BR 43 20 8 4.3 ~ 5WH25/30 B/BR 51 32 11 4.3 ~ 5WH40/50 B/BR 55 40 10 4.3 ~ 5WH60/70 B/BR 60 50 10 4.3 ~ 5


Location of hangingLocation of hanging

Install at a location that gives sufficient space clearance for:Install at a location that gives sufficient space clearance for:

• Hanging the unitHanging the unit

• Installing and maintaining the water pipingInstalling and maintaining the water piping

• Installing and maintaining the duct workInstalling and maintaining the duct work

• Accessing the unit’s internal parts via access panelAccessing the unit’s internal parts via access panel

• Removal of air filter for cleaningRemoval of air filter for cleaning


Location of hangingLocation of hanging

supply air

return air

500 mm

800 mm

800 mm

1200 mm

air filter

access panel

Dia. 23


DuctworkDuctwork

Supply & ReturnSupply & Return

• Use good acoustic lined ductsUse good acoustic lined ducts

• Return air ducts are recommended where noise is criticalReturn air ducts are recommended where noise is critical

• Make sure ducts are connected firmly to prevent air Make sure ducts are connected firmly to prevent air leakageleakage


DuctworkDuctwork

In general, there are 2 methods of applying the unit:In general, there are 2 methods of applying the unit:

1. Ducted supply, free return1. Ducted supply, free return

(a)(a)

WH unit

Supply duct

diffusersFree return

within the room

FREE

RETURN

EXPOSED

- The unit is left exposed within the room together with the - The unit is left exposed within the room together with the supply ductwork supply ductwork


DuctworkDuctwork

1. Ducted supply, free return1. Ducted supply, free return

(b)(b)

WH unit

supply duct

ceiling boardreturn grille

diffusers

FREE RETURN WITHIN CEILING

- The unit is within the ceiling space acts as a return plenum.- The unit is within the ceiling space acts as a return plenum.


DuctworkDuctwork

2. Ducted supply, ducted return2. Ducted supply, ducted return

- Useful when noise attenuation is critical in the room- Useful when noise attenuation is critical in the room

WH unit

supply duct

ceiling board

return grille

diffusers

return duct





Water OutWater In

WH Unit

• Males couplingsMales couplings

• In general, no pipe insulation required In general, no pipe insulation required



Flexible hoseFlexible hose

• To ease water pipe installationTo ease water pipe installation

• Steel reinforced PVC hose with 2 female BSP couplings at Steel reinforced PVC hose with 2 female BSP couplings at the end.the end.

• Use O-rings provided to have a leak-proof jointUse O-rings provided to have a leak-proof joint

Female couplings



Pressure gauge

Water Inlet

Water Outlet

Gate Valve

Strainer

Automatic Shut-off

Valve

Flexible joint

Thermometer

Balancing Valve

WH Unit


DrainageDrainage

• Slanting drain pan design Slanting drain pan design

Slanting drain pan Drain

• Drain pipe must be inclined at an angle to allow free drainageDrain pipe must be inclined at an angle to allow free drainage

Drain pipe, ¾”

Slope downwards to the nearest drain(recommended 1:100)

U-Trap


Cleaning and Flushing SystemCleaning and Flushing SystemSystem must be cleaned and flushed

Close all air vents after filling

Fill with water and open all air vents

Individual supply and return pipes connected first

Drains at the lowest point open

Check piping leaking

Check all air vents in sequence to bleed off any trapped air

Short-circuited connection to the supply and return pipes removed

Open all the drains and vents to complete drain down

Water valves set to make up for the required flow rate


Operating RangeThe operating range for EWT The operating range for EWT

is 12°C to 45°C.is 12°C to 45°C.

Rated Conditions:Rated Conditions:

Cooling Cooling

Ambient (DB/WB) : 27°C/19°C Ambient (DB/WB) : 27°C/19°C

Water IN: 30°C Water IN: 30°C Water OUT: 35°CWater OUT: 35°C

Heating:Heating:

Ambient (DB) : 20°CAmbient (DB) : 20°C

Water IN: 20°CWater IN: 20°C


Thank YouThank You

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INSTALLATION & COMMISSIONING