Comfortaire CMA18SB-1 Instruction manual

INSTALLATION, OPERATION
& MAINTENANCE MANUAL
Horizontal/Side Discharge
Condensing Units
Models:
CMA18SB-1
CMA24SB-1
CMA30SB-1
CMA36SB-1
AITONS EQUIPMENT • Guelph, ON N1H 6H9 • 1-888-744-2911 • www.aitons.com

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Horizontal/Side Discharge Condensing Units AITONS EQUIPMENT
Horizontal/Side Discharge Condensing Units:
Installation, Operation and Maintenance
TABLE OF CONTENTS
Safety Precautions ................................................................................................................... 3
General Operating Instructions................................................................................................. 4
General Product Information .................................................................................................... 5
Outdoor Unit Installation........................................................................................................6-7
Unit Wiring ........................................................................................................................... 8-10
Wiring Diagrams .................................................................................................................. 8-10
Refrigerant Piping................................................................................................................... 11
Leak Test, Evacuation & Release of Refrigerant .................................................................... 11
Initial Start-Up & Checks ........................................................................................................ 12
Field Charging ........................................................................................................................ 12
Field Inspection ...................................................................................................................... 12

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Horizontal/Side Discharge Condensing Units
1) Install according to this installation instructions strictly. If installation is defective, it will cause water
leakage, electrical shock fire, and may void the warranty.
.
2) Use the manufacturer’s specified and supplied parts only
3) Install in a strong and firm location which is able to withstand the unit’s weight. If the strength is
insufficient or installation is not properly done, the units can fall and cause injury.
4) For electrical work, follow all local and National electrical codes and these installation instructions.
An independent circuit and single outlet must be used. If electrical circuit capacity is not enough or a
defect found in electrical work, it may cause electrical shock or fire.
5) Use the specified cable, connect tightly and clamp the cable so that no external force will be acted
on the terminal. If connection is loose, it may cause excessive heat build up.
6) Wiring routing must be properly arranged so that control board cover is fixed properly. If control board
cover is not fixed perfectly, it will cause heat build up at connection point of terminal, fire or electrical shock.
7)
When carrying out piping connection, take care not to let air substances other than the specified
refrigerant go into refrigeration circuit. Otherwise, it will cause lower capacity, abnormal high pressure
in the refrigeration cycle, explosion and injury.
8) Do not modify the length of the power supply cord or use an extension cord, and do not share the
single outlet with other electrical appliances. Otherwise, it may cause fire or electrical shock.
1) This equipment must be properly grounded and installed with and ground leakage current breaker,
electrical shock.
otherwise it may cause
2) Do not install the unit in place where leakage of flammable gas may occur. If gas leaks and
accumulates near or surroundings the unit, it may cause fire.
3) Carry out drainage piping as mentioned in installation instructions. If drainage is not properly done,
water may enter the room and damage the furniture.
The seriousness of safety precautions is classified by the following indications:
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to property.
SAFETY PRECAUTIONS
CAUTION
WARNING
CAUTION
WARNING
Please read this installation manual completely before installing the product.
If the power cord is damaged, replacement work shall be performed by authorized personnel only.
Installation work must be performed in accordance with all local and national codes by authorized
personnel only.
Contact an authorized service technician for repair, maintenance or installation of this unit.
The design and specifications are subject to change without prior notice for product improvement.
Consult with the sales agency or manufacturer for details.
All the pictures in the instructions are for explanation purposes only, and may differ from the actual
product you purchased.
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Horizontal/Side Discharge Condensing Units AITONS EQUIPMENT
OPERATING INSTRUCTIONS
Air conditioners are designed to provide comfort
cooling at outside temperatures above 65°F
(18°C) but less than 109°F (43°C). Operating the
air conditioner outside of this temperature range
may cause unit failure and will void the warranty.
If you have need for cooling at lower outdoor
installed. Contact your local contractor or call the
factory.
TO OPERATE:
NOTE: The thermostat operation may vary
by type and model used. Please consult the
operating manual that was provided with
the thermostat. The instructions below are
generalized for most standard thermostat
models.
1. Set the switch on your wall thermostat to the
‘cool’ position.
2. Set the desired temperature (between 63-86°F
or 17-30°C) you want to maintain by moving the
temperature setting on your thermostat. If the
room is warmer than the setting, the unit will
turn on and begin to blow cool air after a few
minutes. A warm, humid room or building may
take several hours of continuous operation to
Once the set temperature is reached the unit
will cycle on and off.
3. Set the ‘Fan’ switch on the thermostat to ‘auto’
if you want the fan to run only when cooling
is needed or to ‘on’ if you want continuous
air circulation. The ‘on’ setting of the fan
generally provides better temperature control by
eliminating stagnant air.
NOTE: A properly installed and sized unit will
not cycle more than 10 times per hour. If you
notice more frequent starts call your service
contractor.
4. For energy conservation reasons, you may want
to set your thermostat at a higher temperature
when you are away. Do not raise the
temperature setting by more than 5 degrees.
Changing the temperature by more than 5
degrees or shutting the unit ‘off’ can actually
cost more than leaving the setting at a constant
temperature.
IMPORTANT
Wait at least 3 minutes after turning your air
conditioner off before trying to restart it. This
gives the unit the time needed to stabilize
before restarting. Failure to do so may cause
unit damage and failure.
MAINTENANCE:
Only simple periodic maintenance is required:
or more frequently if unusual conditions are
encountered. If you have a disposable type,
throw the old one away and install a fresh one
of the same size and type. If your unit has a
washable type then vacuum and wash with
soap and water. Flush thoroughly and dry
before re-installing.
2. Keep the coil in the outdoor unit clean.
garden hose. Clean away all foreign materials
such as dust, leaves, grass clippings, papers,
etc.
IMPORTANT!
Alterations and replacement parts:
Altering the product or replacing parts
with non-authorized parts will void the
factory Warranty and may result in adverse
operational performance and/or a possible
hazardous safety condition to service
personnel and occupants. If you are in doubt
factory replacement parts, call Heat Controller
at [phone] for assistance.
WARNING
may result if water spray is directed at live
electrical connections or power sources.

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Horizontal/Side Discharge Condensing Units
GENERAL PRODUCT INFORMATION
UNPACKING AND INSPECTION:
The condensing unit is shipped completely
assembled and in it’s own package. All goods are
inspected at the factory and released to the freight
company in good condition. When received at the
site, a visual inspection of all packages should be
made immediately. Any evidence of rough handling
or apparent damage should be noted on the
delivery receipt and the material inspected in the
presence of the carrier’s representative. If damage
freight company.
COOLING OPERATION
TEMPERATURE LIMITS:
Heat Controller Condensing units are designed
to operate in cooling at outside temperatures
between 65°F (18°C) and 109°F (43°C). If
the condensing unit will be used to cool at
temperatures below 65°F (18°C), a low ambient
65°F (18°C) without low ambient control will void
the warranty.
INDOOR UNIT USE
AND SYSTEM EFFICIENCY:
Heat Controller condensing units are designed to
be compatible with most major brands of domestic
evaporator coils/air handlers. Imported ductless air
handlers maybe used but often do not include an
expansion device. A properly sized thermostatic
expansion valve is recommended. Consult AHRI’s
THERMOSTAT AND INDOOR
FAN TIME DELAY:
All indoor units should include a fan time delay.
This may be accomplished by using a digital wall
thermostat or installation of a 60 second fan time
air handler.
Most brands of electronic thermostats include a
responsibility of the installer. Proper temperature
control and unit operation depends on proper
thermostat selection and location. Refer to the
thermostat manufacturer’s installation instructions
to avoid outside walls, locations where the sun
may shine directly on the thermostat, and locations
where the air from supply registers or unit outlets
blow on the thermostat. Also avoid locations where
the thermostat could be jarred by a closing door or
not provided by the factory, therefore a locally
any particulates or moisture that may be
present in the system. Installations without an
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