Mars Comfort-Aire Century CMA1412SF-0 Installation, Operation And Maintenance Manual Download Page 5

IOM -  

Horizontal/Side Discharge Condensing Units

5

5

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 

is found a claim should be immediately filed with 

the 

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 

control must be field installed. Operation below 

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 

directory of certified products for indoor matches.

Most brands of electronic thermostats include a 

fan delay. Properly specified thermostats are the 

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 

for specified recommendations. Good practice is 

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 

high traffic area.

WARNING:  An in-line filter drier is required 

when the unit is installed.  The filter drier is 

not provided by the factory, therefore a locally 

purchased filter drier must be used to remove 

any particulates or moisture that may be 

present in the system.  Installations without an 

in-line filter drier may void the warranty.

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

 

different fan time 

delay designed to work with your specific furnace/

air handler. As follow: 

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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