INSTALLATION & COMMISSIONING

5WSS Installation Hanging the Unit Hanging the Unit Location Considerations Location Considerations Refrigerant Piping Refrigerant Piping Water Piping Water Piping Cleaning & Flushing System Cleaning & Flushing System

Hanging the Unit

Recommend to use Rubber isolator on the brackets to reduce noise and vibration transmissions

Location Considerations 1. Provide recommended service clearance to assure easy access for: Water piping Water piping Electrical connections Electrical connections Periodic maintenance and occasional service Periodic maintenance and occasional service 2.Recommended location (sound emission is outside the occupied space): Corridor Bathroom Special Room for Air-Conditioning Unit

Refrigerant Piping Three major things to be concerned: Piping Length Piping Length Elevation Elevation No. of bends No. of bends Choose shortest path Follow the recommended data in the table (Installation Manual)

Refrigerant Piping

Additional Charges for 5WSS unit The pre-charged of R410A in the 5WSS unit is suitable for Standard The pre-charged of R410A in the 5WSS unit is suitable for Standard pipe of length up to: pipe of length up to: – 2 meter for 5WSS10/15/20/25/30/40/50 AR – 5 meter for 5WSS60AR When the piping is more than the standard pipe length, please add accordingly When the piping is more than the standard pipe length, please add accordingly

Water Piping

Males couplings, BSPP Males couplings, BSPP no pipe insulation required no pipe insulation required Water IN Water OUT

Water Piping Flexible hose To ease water pipe installation To ease water pipe installation Steel reinforced PVC hose with 2 female BSPP couplings at the end. Steel reinforced PVC hose with 2 female BSPP couplings at the end. Use O-rings provided to have a leak-proof joint Use O-rings provided to have a leak-proof joint Female couplings

Water Piping Pressure gauge Water Inlet Water Outlet Gate Valve Strainer Automatic Shut-off Valve Flexible joint Thermometer Balancing Valve WSS Unit

Cleaning and Flushing System System 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 Range The operating range for EWT is 12°C to 45°C. Rated Conditions: Cooling Ambient (DB/WB) : 27°C/19°C Water IN: 30°C Water OUT: 35°C Heating: Ambient (DB) : 20°C Water IN: 20°C

WH Installation Hanging the Unit Hanging the Unit Location of Hanging Location of Hanging Ductwork Ductwork Water Piping Water Piping Drainage Drainage Cleaning & Flushing System Cleaning & Flushing System

Hanging the Unit Hanger threaded rods Bolted to underside of ceiling slab

Hanging the Unit Recommend to use vibration isolators on Recommend to use vibration isolators on the brackets to reduce noise and vibration the brackets to reduce noise and vibration transmissions transmissions Spring isolator to be used for better vibration Spring isolator to be used for better vibration control. control. spring bottom washer PVC tube Upper washer, welded onto bracket nut bracket

Hanging the Unit 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 bracket mounting 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

Location of hanging Install at a location that gives sufficient space clearance for: Hanging the unit Hanging the unit Installing and maintaining the water piping Installing and maintaining the water piping Installing and maintaining the duct work Installing and maintaining the duct work Accessing the unit’s internal parts via access panel Accessing the unit’s internal parts via access panel Removal of air filter for cleaning Removal of air filter for cleaning

Location of hanging supply air return air 500 mm 800 mm 1200 mm air filter access panel Dia. 23

Ductwork Supply & Return Use good acoustic lined ducts Use good acoustic lined ducts Return air ducts are recommended where noise is critical Return air ducts are recommended where noise is critical Make sure ducts are connected firmly to prevent air leakage Make sure ducts are connected firmly to prevent air leakage

Ductwork In general, there are 2 methods of applying the unit: 1. Ducted supply, free return (a) (a) WH unit Supply duct diffusers Free return within the room FREE RETURN EXPOSED - The unit is left exposed within the room together with the supply ductwork - The unit is left exposed within the room together with the supply ductwork

Ductwork 1. 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.

Ductwork 2. 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 Piping

Water Out Water In WH Unit Males couplings Males couplings In general, no pipe insulation required In general, no pipe insulation required

Water Piping Flexible hose To ease water pipe installation To ease water pipe installation Steel reinforced PVC hose with 2 female BSP couplings at the end. Steel reinforced PVC hose with 2 female BSP couplings at the end. Use O-rings provided to have a leak-proof joint Use O-rings provided to have a leak-proof joint Female couplings

Water Piping Pressure gauge Water Inlet Water Outlet Gate Valve Strainer Automatic Shut-off Valve Flexible joint Thermometer Balancing Valve WH Unit

Drainage Slanting drain pan design Slanting drain pan design Slanting drain pan Drain Drain pipe must be inclined at an angle to allow free drainage Drain 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 System System 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 Range The operating range for EWT is 12°C to 45°C. Rated Conditions: Cooling Ambient (DB/WB) : 27°C/19°C Water IN: 30°C Water OUT: 35°C Heating: Ambient (DB) : 20°C Water IN: 20°C

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