Mars Comfort-Aire Century CMA1412SF-0 Installation, Operation And Maintenance Manual Download Page 4

IOM -  

Horizontal/Side Discharge Condensing Units

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Horizontal/Side Discharge Condensing Units 

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 

temperatures a “low ambient cooling” device can 

be field 

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

cool to the thermostat set point the first time.

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:

1. Change or clean the indoor unit air filter 

monthly 

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.

 

Periodically flush the coil thoroughly with a 

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 

as to how to service this unit or where to find 

factory replacement parts, call Heat Controller 

at (517) 787-2100 for assistance.

WARNING

Turn the power off first! Serious injury or death 

may result if water spray is directed at live 

electrical connections or power sources.

Summary of Contents for Comfort-Aire Century CMA1412SF-0

Page 1: ...orizontal Side Discharge Condensing Units Models CMA1412SF 0 CMA1418SF 1 CMA1424SF 1 CMA1430SF 1 CMA1436SF 1 CMA1448SF 1 Installation Operation and Maintenance Manual 517 787 2100 www marsdelivers com...

Page 2: ...tallation 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 12 Wiring Diagrams...

Page 3: ...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...

Page 4: ...0 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...

Page 5: ...uctless air handlers maybe used but often do not include an expansion device A properly sized thermostatic expansion valve is recommended Consult AHRI s directory of certified products for indoor matc...

Page 6: ...snowfall Ensure that the awning is at least 2 ft above the top of the unit s housing Insure free flow of air into and out of the unit Inlets outlets should stay clear of obstructions such as walls an...

Page 7: ...ed to ensure that the air inlets and outlets are not obstructed See Fig 4 Anchor the outdoor unit with a 10mm 3 8 inch diameter bolt and nut tightly on a concrete or rigid surface See Fig 5 Anchoring...

Page 8: ...wiring and or improper electrical supply will likely result in failure of the compressor and other electrical components and voids the warranty NOTE The supply voltage must be consistent with the rate...

Page 9: ...tinued NOTE1 Please refer to the installation instructions of the 24V thermostat used in conjunction with this unit for additional wiring instructions TERMINAL bLOCk OF OUTDOOR UNIT TERMINAL bLOCk OF...

Page 10: ...Horizontal Side Discharge Condensing Units 10 Horizontal Side Discharge Condensing Units OUTDOOR UNIT WIRING CONNECTION continued 12K 18K 10 NOTE For reference only the actual wiring diagram shall pre...

Page 11: ...IOM Horizontal Side Discharge Condensing Units 11 24K 30K 36K Horizontal Side Discharge Condensing Units 11 NOTE For reference only the actual wiring diagram shall prevail...

Page 12: ...IOM Horizontal Side Discharge Condensing Units 12 48K Horizontal Side Discharge Condensing Units 12 NOTE For reference only the actual wiring diagram shall prevail...

Page 13: ...lves 5 Evacuate to 500 microns or less for a minimum of 30 minutes Close the manifold valves and shut off the pump Note the vacuum reading and wait 15 minutes Take a new vacuum reading A reading of 80...

Page 14: ...art up will payoff in the long run Operating conditions such as voltage air flow evaporator coil size and indoor and outdoor temperature and humidity all have an effect on the system pressures and sup...

Page 15: ...t retain a receipted bill of sale as proof of warranty period Without this proof the express warranty begins on the date of shipment from the factory REMEDY PROVIDED BY THE LIMITED EXPRESS WARRANTY Th...

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