Aira HCV User guide

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Installation, Startup, Operation,
Service & Maintenance Manual
HCV & HCVR
Evaporative Cooler / Heater

CONTENTS
HCV & HCVR Evaporative Cooling & Gas Heating
Page 2of 26
Contents
GENERAL INFORMATION ............................................................................................................4
Unit Configurations / Components ................................................................................................ 7
OPERATING INSTRUCTIONS....................................................................................................... 8
Wall Control Options ................................................................................................................... 8
General Operation ...................................................................................................................... 9
HCVR Return Air Models .............................................................................................................. 9
INSTALLATION INSTRUCTIONS................................................................................................10
Installation Guidelines............................................................................................................... 10
Installation .............................................................................................................................. 10
On receipt of equipment......................................................................................................... 10
Unit Location ........................................................................................................................ 10
Flue..................................................................................................................................... 11
Gas Supply........................................................................................................................... 11
Electrical Supply ................................................................................................................... 11
Water Supply........................................................................................................................ 12
Water 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
Inadequate cooling................................................................................................... 20
Pilot flame goes out.................................................................................................. 21
Pilot flame does not light .......................................................................................... 21
Burners do not come on when pilot flame is alight and room thermostat is ‘Made’............ 21
Unit overheats and locks out limit switch .................................................................... 22

CONTENTS
HCV & HCVR Evaporative Cooling & Gas Heating
Page 3of 26
System fan motor fails to operate .............................................................................. 22
Burner flames are yellow or tend to ‘float’ ................................................................... 22
Primary aeration incorrect......................................................................................... 22
Fan does not start.................................................................................................... 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

Safety Information
HCV & HCVR Evaporative Cooling & Gas Heating
Page 4of 26
GENERAL INFO THIS HEATER IS TO BE INSTALLED BY AN AUTHORISED
PERSON ONLY
DO NOT Operate this appliance before reading the manual.
DO NOT Place articles on or against this appliance.
DO NOT Use or store flammable materials near this appliance.
DO NOT Operate this appliance with panels, covers or guards removed.
DO NOT Spray aerosols in the vicinity of this appliance while it is in operation.
This AIRA unit must be installed in accordance with these instructions, local gas fitting regulations,
municipal building codes, electrical wiring regulations, Australian Standard AS/NZS 5601 Gas Installations
and any other relevant statutory requirements.
Employers and Employees Responsibility
The installation and maintenance of gas ducted
heating units, particularly at height, has the
potential to create Occupational Health and Safety
issues for those involved. Installers are advised to
ensure they are familiar with relevant State and
Federal legislation, such as Acts, Regulations,
approved Codes of Practice and Australian
Standards, which offer practical guidance on these
health and safety issues. Compliance with these
regulations will require appropriate work practices,
equipment, training and qualification of workers.
Seeley International provides the following
information as a guide 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 complicated process - it is a matter
of assessing the job to be done and considering
what actions are necessary so the person doing the
job does not injure themselves.
This should be considered in terms of:
What are the chances of an incident occurring?
What could the possible consequences be?
What can be done to reduce, or better still,
eliminate the risk?
HANDLING THE HEATER
The heater has lifting lugs for crane hook-up. Hooks, jacks, or chains must not be applied around casing or
control box.
POSITIONING THE HEATER
Heater should be installed so that it is level. Allow 1200mm clearance at the front and control side of the
heater and 500mm on the bottom, top, and other side. Air intake to the unit should not be restricted in
any manner.
Wiring Electrical connections must be in accordance with all relevant Australian standards.
Avoid quiet areas:
Directly above, below or outside bedrooms, living room, lounge room, dining room etc. Some points to
consider
Preferred installation locations:
Above, below or outside laundry, bathroom, kitchen, garage etc’
PIPING
Gas piping should be sized adequately, in accordance with the Australian Gas Association’s installation code
AG501.

Safety Information
HCV & HCVR Evaporative Cooling & Gas Heating
Page 5of 26
SOME POINTS TO CONSIDER
Some points to consider when working on or in a roof
What is the best and safest access to the roof and working areas?
What condition is the roof in? Should the roof structure and surface be checked?
Does the worker have appropriate footwear?
Are all power cables/extension leads safe and appropriately rated?
Are all ladders, tools and equipment suitable and in good condition?
Where ladders are to be used, is there a firm, stable base for them to stand on? Can they be tied or
secured in some way at the top?
Is there a roof anchor to attach a harness and lanyard to? If so, instruction should 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/lightning or other types of weather giving wet, slippery surfaces?
Is there an on-going safety check system of harnesses, ropes, ladders and access/lifting equipment,
and any anchor points on roofs before the commencement of work?
Is there a system which prevents employees from working on or in roofs if they are unwell or under
the influence of drugs or alcohol?
Are there any special conditions to consider i.e. excessive roof pitch, limited ground area, fragile roof,
electrical power line