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Aira HCV, Installation, Startup, Operation, Service & Maintenance Manual

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Aira HCV Installation, Startup, Operation, Service & Maintenance Manual Download Page 14

 INSTALLATION INSTRUCTIONS  

 

 

 

HCV & HCVR Evaporative Cooling & Gas Heating 

Page 14 of 26 

 

 

R

OOF 

S

TANDS

 

INSTALLATION and ASSEMBLY INSTRUCTIONS FOR HCV ROOF STANDS 

These roof stands have been designed to be assembled on site and come complete with all necessary items 
to achieve a level mounting surface for the unit. When mounted either parallel to or across the roof pitch, 
the stands will compensate for the following maximum roof pitches. 

Unit 

Stand set up parallel 

with roof pitch 

Stand mounted across 

roof pitch 

HCV 12 

 

21° 

32° 

HCV 16 

 

21° 

25° 

HCV 22 

 

18° 

25° 

HCV 26 

 

18° 

25° 

HCV 35 

15° 

22° 

HCV 40 

15° 

22° 

HCV 45 & 50 Special Roof Stands Required 

It is recommended that waterproof timbers or similar be fitted to the roof under the stand legs to distribute 
the unit weight evenly. Assemble roof stand frame as per diagram, attach corner legs and feet to suit 
approximate roof pitch. Cross members incorporating twelve punched holes must be fitted to both ends of 
the roof stand. The heater section end or discharge end can be identified by the cross member which is 
387mm from an end cross member. 

Place in correct position on roof and adjust level. Fix leg braces into position (ensure legs are at right 
angles to frame) and tighten all bolts. Flat washers to be fitted under all bolt heads and nuts. Hole 
spacing’s in the long and short leg combine to provide adjustment of height increments of 12mm. Finer 
adjustment if necessary can be made by placing 1.6mm metal packing pieces under the feet of the stand. 

Provision has been made for the leg braces to be fitted to side members in two positions. This makes 
allowance for standard pitch and shallow pitch roofs. 

If the full length of the legs is not required, the excess may be cut off at the top leaving 38mm above the 
roof stand surface for locating purposes. 

NOTE: On the HCV 12 roof stand it is necessary to cross the leg braces on the end. This is achieved by 
fixing one brace to the inside surface of the leg and end cross member and the other as shown in the 
diagram in accordance with statutory requirements. 

 

 

 

 

 

 

 

Summary of Contents for HCV

Page 1: ... Installation Startup Operation Service Maintenance Manual HCV HCVR Evaporative Cooler Heater ...

Page 2: ...er Setup 12 Water Supply 12 Dump Valve Optional 13 Drain 13 Roof Stands 14 COMMISSIONING 15 Cooling Section 15 Heating Section 16 Temperature Control 17 UNIT SERVICE 18 Blower and Drive Components 18 Cooling Section 18 Heating Section 19 Clean and Service 19 Remove Pilot Assembly and Burner Bars 19 Remove Main Burner Bars 19 Cleaning burners 19 Gas Controls 20 Fault Finding 20 Cooling Section 20 I...

Page 3: ... 20 Overheating Motor 20 Belt slip or excessive belt wear 20 Pump fails too operate 20 Pump runs but water not circulated or pads dry 20 Heating Section 21 Unit locks out 21 Pilot flame lights but will not hold in 21 Heating not delivering proper amount of heat 21 Flame flash back and burning at orifices 21 Delayed or rough ignition 21 COMMISSIONING REPORT 23 WARRANTY TERMS AND INFORMATION 24 ...

Page 4: ... to contractors and employees to assist in minimising risk Risk Assessment A risk assessment of all hazardous tasks is required under legislation A risk assessment is an essential element that should be conducted before the commencement of work to identify and eliminate the risk of falls and other risks or to minimise these risks by implementing control measures This does not need to be a complica...

Page 5: ... be issued for the use of an approved harness or only suitably trained people used Are all tools and materials being used prevented from slipping and falling onto a person at ground level Is the area below the work area suitably protected to prevent people entering this area Does the work schedule take into account weather conditions allowing for work to be suspended in high winds thunder storms l...

Page 6: ...tilised to cool down or heat up the work area I e if the work area is has machinery that is generating heat above 22 c and the ambient temperature is 18 C with high humidity the ventilation mode can be selected With a Return air function installed gas consumption is reduced Supply air is heated and then returned through the heat exchanger to be reheated If the heater is fitted with a modulating ga...

Page 7: ...S HCV Outside view marine grade aluminum Flue Cowl Adjustable Stand Heater Cooler HCV internal view Motor Pulley Blower Assembly Pulley Heater Gas Train Return air HCV Rear return Fresh Air Louvre Inlet Thermostat Control Box Outlet Thermostat Supply Air Damper Motor Gas Valve Inlet Modulating Gas Valve ...

Page 8: ...N LOW POSITION HIGH COOL FAN SWITCH ON COOL SWITCH ON HEAT SWITCH OFF HIGH LOW SWITCH IN HIGH POSITION HEAT FAN SWITCHON COOL SWITCH OFF HEAT SWITCH ON HIGH LOW SWITCH IN LOW POSITION Note that heating will not operate with high low switch in high position 1 2 Optional Rotary remote selector switch functions Hi Cool Evaporative cooling dampers open maximum air delivery Lo Cool Evaporative cooling ...

Page 9: ...and low vent Water pump and fan operate Heating section is de energised 11 To shut down gas burners completely close main stop cock at unit and turnoff isolating switch in the heater section of the unit HCVR RETURN AIR MODELS The HCVR Return Air Models are designed to allow full fresh air on cooling as per standard HCV but then allow economical return air heating during the heating mode This is ac...

Page 10: ...cted to the heater Refer AS 5601 pipe sizing chart Water Supply All water connections and piping must conform to standard codes and local requirements Do not locate unit in an enclosed plant room unless sufficient openings are available to ensure air pressure in the plant room cannot become negative with all items in the plant room operating For installations similar to this consult fuel supply au...

Page 11: ...nd at the appliance are preferred f Horizontal runs if unavoidable should rise not less than 25mm per meter run with a vertical section of the flue s extended through the roof Refer AGA Installation Code AS 5601 for horizontal to vertical flue length ratios g End of flue pipe s outdoors must be terminated with an AGA approved cowl h Flue up draft must be confirmed after appliance if fired i New un...

Page 12: ...ailable water supply pressure is not less than 220 kPa 30psi The supply pipe should be 12mm copper pipe or similar approved A turn ball isolating valve must be installed on the supply pipe near the unit for ease of maintenance Do not use duo or non return valves of any kind including stop taps with jumper washer NOTE Non return type valves can have an effect on the operation of the water solenoid ...

Page 13: ...tube between the dump valve and the solenoid valve The 24V solenoid will be supplied with an in line transformer for 240V connection Connect the 240V solenoid transformer leads in parallel with the pump terminations Or Connect to a timed delay independent circuit supplied by the installer The tank in the unit will only fill once power has been applied to the solenoid valve transformer via the pump...

Page 14: ...tted to both ends of the roof stand The heater section end or discharge end can be identified by the cross member which is 387mm from an end cross member Place in correct position on roof and adjust level Fix leg braces into position ensure legs are at right angles to frame and tighten all bolts Flat washers to be fitted under all bolt heads and nuts Hole spacing s in the long and short leg combin...

Page 15: ...its in pads indicate insufficient bleed off DUMP VALVES An additional optional dump valve system can be installed to activate to drain water tray deactivation of water pump on shutdown or during heating cycle Installation of Dump Valve is not an alternative to bleed off Bleed of rates must be maintained at all times during cooling cycle 5 Check and set water distribution by adjusting water restric...

Page 16: ... off main or selector switch and wait five minutes When pilot ignites check that flame is licking over the edge of the main burner adjacent If not pilot flame may be adjusted by the pilot regulator or by the small adjusting screw located under the round headed screw on the top of gas valve with fibre washer has marking pilot adj 11 Turn off unit set room thermostat to a setting above the room temp...

Page 17: ...ampers located at the outlet of the heating section are controlled by a two position damper motor which is fitted and wired as an integral part of the unit The dampers closed position may be varied by adjusting the linkages This is done to provide the air quantity or temperature rise required for heating NOTE Temperature rise must be between 11 C and 33 C On High Cool and High Vent dampers must be...

Page 18: ... 5 Check condition and tension of fan belt s Adjust and or replace as necessary 6 Check pump operation and that bleed off is operating correctly and not blocked 7 Refit pad frames and start up unit in accordance with operating instructions 8 Cleaning The filter pad frames in the HCV cooling section should be periodically cleaned At this time the cooler cabinet should be inspected and cleaned Filte...

Page 19: ... the rear to remove from offset at front 7 Lift internal baffle assemblies from flue tubes 8 Clean baffle and inner surface of flue tubes thoroughly A 38 or 44mm diameter wire brush with a long handle is recommended 9 Remove dirt from bottom tray Remove Pilot Assembly and Burner Bars 1 Uncouple pilot gas pipe from the pilot burner s 2 Pilot assembly can be removed by two 4mm screws 3 Remove the bu...

Page 20: ... discharge openings or inadequate exhaust from area being cooled causing high humidity Make sure there is adequate provision for exhausting air from area being cooled Fan does not start 1 Circuit breaker tripped or fuse blown Reset or replace fuse 2 Loose electrical connections Check all connections 3 Faulty control switch Replace 4 Faulty motor Replace 5 Loose pulley or belt Tighten belt and pull...

Page 21: ...air shutter for correct primary air 4 Low fire rate set too low Adjust bypass rate screw high low Manufactured gas unit or modusnap bypass screw requires adjustment Natural and LPG units Delayed or rough ignition 1 Dirt in main burner orifices Remove and clean 2 Burners covered with scale or other foreign matter Remove and clean Pilot flame goes out 1 Flame too small Clean and adjust refer to clea...

Page 22: ...t too high due to oversized injectors Consult manufacturer for orifice size 2 Gas line pressure above that specified on data plate Install high pressure regulator if line pressure cannot be reduced 3 Exhaust fans causing fault draft Provide opening to admit adequate fresh air to plant room to eliminate negative pressure Provide make up air if necessary 4 Improper flueing Refer AGA installation Cod...

Page 23: ...any unusual vibration Check throughout fan range if variable speed Is there any unusual noise Is there any bearing noise Is there any motor over heating Check dampers open and close smoothly Do the control dampers function as units specifications Belt tension checked after operations Design fan RPM Measured RPM Design amp Draw L1 L2 L3 Measured Amp Draw L1 L2 L3 Motor Contactor overloads set at Lo...

Page 24: ...eplaced or repaired at the discretion of Seeley without charge for either parts or labour during normal working hours Further we may deem in our absolute discretion to replace the Goods and if so we may substitute any similar good even if it is not on our current price equipment list Further Goods presented for repair may be replaced by refurbished goods of the same type rather than being repaired...

Page 25: ...r or equipment associated with gaining acceptable and safe service access to the Goods installed in restricted high or unsafe locations and or the removal and replacement of any barrier walls roofs floors fences etc and c any costs incurred by the Seeley International service agent in gaining access to the Goods which is necessary to comply with any safety or workplace safety requirements and or a...

Page 26: ...Seeley International to introduce continual product improvement Accordingly specifications are subject to change without notice Please consult with your dealer to confirm the specifications of the model selected BARCODE AND SERIAL NUMBER ...

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