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Owner’s Manual -  

CMA12-48SD 

 

  

 

15

Congratulations on purchasing your new HVAC equipment. It’s 

been designed for long life and reliable service, and is backed 

by one of the strongest warranties in the industry. Your unit 

automatically qualifies for the warranty coverage listed below, 

providing you keep your proof of purchase (receipt) for the 

equipment and meet the warranty conditions.
LIMITED ONE (1) YEAR PARTS EXPRESS WARRANTY

MARS/Heat Controller warrants all parts of the ‘CMA’ Series 

Condensing  Unit to be free from defects in workmanship and 

materials normal use and maintenance for one (1) year from the date 

of purchase by the original consumer. This Express Limited Warranty 

applies only when the ‘CMA’ Series Condensing Unit is installed 

and operated per MARS/Heat Controller installation and operating 

instructions for normal use, and in accordance with all local, state and 

national codes.

LIMITED FIVE (5) YEAR COMPRESSOR EXPRESS WARRANTY

The compressor only is warranted to be free from defects in 

workmanship and materials under normal use and maintenance for 

four  additional  years,  for  a  total  of  five  (5)  years  from  the  date  of 

purchase  by  the  original  consumer. This  five  year  warranty  applies 

only when the system is installed and operated per MARS/Heat 

Controller installation and operation instructions for normal use.

COMMERCIAL USE–LIMITED ONE (1) YEAR PARTS WARRANTY

When the unit is put to commercial, business, rental, or any application 

other than residential use, the One Year Parts Limited Warranty as 

described in paragraph one is the only warranty that applies.

EXCEPTIONS

The Limited Express Warranty does not cover normal maintenance—

MARS/Heat Controller recommends that regular inspection/

maintenance be performed at least once a season and proof of 

maintenance be kept. Additionally, labor charges, transportation 

charges for replacement parts, replacement of refrigerant or filters, 

any  other  service  calls/repairs  are  not  covered  by  this  Limited 

Warranty.  It  also  does  not  cover  any  portion  or  component  of  the 

system that is not supplied by MARS/Heat Controller, regardless of 

the cause of failure of such portion or component.

CONDITIONS FOR WARRANTY COVERAGE

•  Unit must be operated according to MARS/Heat Controller operating 

instructions included with the unit and cannot have been subjected 

to accident, alteration, improper repair, neglect or misuse, or an act 

of God (such as a flood)

•  Installation was done by a trained, licensed or otherwise qualified 

HVAC dealer/contractor

•  Performance cannot be impaired by use of any product not 

authorized  by  MARS/Heat  Controller,  or  by  any  adjustments  or 

adaptations to components

•  Serial  numbers  and/or  rating  plate  have  not  been  altered  or 

removed

•  Damage has not been a result of inadequate wiring or voltage 

conditions, use during brown-out conditions, or circuit 

interruptions

•  Air flow around any section of the unit has not been 

restricted

•  Unit remains in the original installation

•  Unit was not purchased over the internet

DURATION OF WARRANTY & REGISTRATION

The warranty begins on the date of purchase by the original consumer. 

The consumer must 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

The sole remedy under the Limited Warranty is replacement of the defective 

part. If replacement parts are required within the period of this warranty, 

MARS/Heat Controller  replacement parts shall be used; any warranty 

on the replacement part(s) shall not affect the applicable original unit 

warranty. Ready access to the unit for service is the owner’s responsibility. 

Labor to diagnose and replace the defective part is not covered by this 

Limited Express Warranty. If for any reason the replacement part/product 

is no longer available during the warranty period, 

MARS/Heat Controller 

shall have the right to allow a credit in the amount of the current suggested 

retail price of the part/product instead of providing repair or replacement. 

LIMITATION OF LIABILITY

1.  There are no other express or implied warranties. MARS/Heat 

Controller makes no warranty of merchantability. We do not warrant 

that the unit is suitable for any particular purpose or can be used 

in buildings or rooms of any particular size or condition except as 

specifically provided in this document. There are no other warranties, 

express or implied, which extend beyond the description in this 

document. 

2.  All warranties implied by law are limited in duration to the one-

year  term  of  the  parts  warranty.  Your  exclusive  remedy  is  limited  to 

the  replacement  of  defective  parts. 

We will not be liable for any 

consequential or incidental damages caused by any defect in this 

unit. 

3.  This warranty gives you specific legal rights and you may also have 

other rights which vary from state to state. Some states do not allow 

limitation on how long an implied warranty lasts or do not allow the 

exclusion or limitation of incidental or consequential damages, so the 

above limitations or exclusions may not apply to you.

4.  No warranties are made for units sold outside the continental United 

States  and  Canada.  Your  distributor  or  final  seller  may  provide  a 

warranty on units sold outside these areas.

5. 

MARS/Heat Controller will not be liable for damages if our performance 

regarding warranty resolution is delayed by events beyond our control 

including  accident,  alteration,  abuse,  war,  government  restrictions, 

strikes, fire, flood, or other acts of God.

HOW TO OBTAIN WARRANTY SERVICE OR PARTS

If you have a warranty claim, notify your installer promptly. If the installer 

does not remedy your claim, write to MARS, 1900 Wellworth Ave., Jackson 

MI 49203. Enclose a report of inspection by your installer or service person. 

Include model number, serial number, and date of purchase.

Owner responsibilities are set forth in the 

instruction manual—read it carefully.

LIMITED EXPRESS WARRANTY

‘CMA’ SERIES HORIZONTAL/SIDE DISCHARGE CONDENSERS

CMA-SD_WARRANTY_3/2018

KEEP THIS INFORMATION AS A RECORD OF YOUR PURCHASE

‘CMA’ SERIES HORIZONTAL/SIDE DISCHARGE CONDENSING UNIT 

 

Model Number 

Model Number 

Installer Name

 

Serial Number 

Serial Number 

Phone No./Contact Info

 

            Date of Purchase  

Date Installation Completed

Remember to retain your bill of sale as proof of warranty period.

MARS/HEAT CONTROLLER

Summary of Contents for COMFORT-AIRE CMA12SD-0

Page 1: ...INSTALLATION OPERATION MAINTENANCE MANUAL Horizontal Side Discharge Condensing Units Models CMA12SD 0 CMA18SD 1 CMA24SD 1 CMA30SD 1 CMA36SD 1 CMA48SD 1 517 787 2100 www marsdelivers com...

Page 2: ...ance TABLE OF CONTENTS Safety Precautions 3 General Operating Instructions 4 General Product Information 5 Outdoor Unit Installation 6 7 Unit Wiring 8 Wiring Diagrams 9 12 Refrigerant Piping 13 Leak T...

Page 3: ...uit Otherwise it will cause lower capacity abnormal high pressure in the refrigeration cycle explosion and injury 1 This equipment must be properly grounded and installed with a ground leakage circuit...

Page 4: ...e 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 m...

Page 5: ...ar metering devices are acceptable for use but bleed style thermostatic expansion valves should be used where specific AHRI Match ratings require or where oversized coils or other application specific...

Page 6: ...of onto the unit In climates where snow is a consideration locate the unit away from areas prone to drifting Ensure the location of the unit will not be subject to snow drifts heavy accumulation of sn...

Page 7: ...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 is especially recommended in seas...

Page 8: ...compressor and other electrical components and voids the warranty NOTE The supply voltage must be consistent with the rated voltage of the air conditioner not to exceed 10 Ensure the unit is properly...

Page 9: ...48SD 9 Owner s Manual CMA12 48SD 9 OUTDOOR UNIT WIRING CONNECTION continued NOTE Please refer to the installation instructions of the 24V thermostat used in conjunction with this unit for additional...

Page 10: ...Owner s Manual CMA12 48SD 10 Owner s Manual CMA12 48SD 10 OUTDOOR UNIT WIRING CONNECTION continued...

Page 11: ...Owner s Manual CMA12 48SD 11 Owner s Manual CMA12 48SD 11 OUTDOOR UNIT WIRING CONNECTION continued...

Page 12: ...Owner s Manual CMA12 48SD 12 Owner s Manual CMA12 48SD 12 OUTDOOR UNIT WIRING CONNECTION continued...

Page 13: ...s service valves are shipped in the closed position and should not be opened until final connections leak testing and evacuation are completed The recommended procedure for leak test evacuation and r...

Page 14: ...temperature and humidity all have an effect on the system pressures and superheat conditions Charge must be added for the interconnecting tubing Use of piston style metering device is typical Where T...

Page 15: ...original consumer The consumer must 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...

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