Thermo Pride CMA1-50N Handbuch

GAS FIRED HIGH EFFICIENCY FURNACE

DOWN FLOW & DIRECT VENT (SEALED COMBUSTION)

MODEL: CMA1-50N & CMA2-75N

INSTALLATION AND SERVICE MANUAL

For installation in:

1. Manufactured Homes

2. Modular Homes/Buildings

3. Site Constructed—Residential (Single Story Dwellings)

FOR YOUR SAFETY

Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this

or any other appliance.

WHAT TO DO IF YOU SMELL GAS

• Do not try to light any appliance.

• Do not touch any electrical switch; do not use any phone in your building.

• Immediately call your gas supplier from a neighbor’s phone.

Follow the gas supplier’s instructions.

• If you cannot reach your gas supplier, call the fire department.

:If the information in these instructions is not followed exactly, a fire or explosion may

result causing property damage, personal injury, or loss of life.

:Improper installation, adjustment, alteration, service, or maintenance can cause

injury or property damage. Refer to this manual. For assistance or additional information,

consult a qualified installer, service agency, or fuel supplier.

: Do not use this appliance if any part has been underwater. Immediately call a

qualified service technician to inspect the appliance and to replace any part of the electrical or

control system that has been underwater.

THERMO PRODUCTS, LLC.

POST OFFICE BOX 217

NORTH JUDSON, IN 46366

PHONE: (574) 896-2133

MG-508

ECN 5135-MA 100615 MADE IN USA

PLEASE READ THESE INSTRUCTIONS PRIOR TO INSTALLATION, INITIAL FIRING, AND BEFORE

PERFORMING ANY SERVICE OR MAINTENANCE. THESE INSTRUCTIONS MUST BE LEFT WITH THE USER

AND SHOULD BE RETAINED FOR FUTURE REFERENCE BY QUALIFIED SERVICE PERSONNEL.

TABLE OF CONTENTS

SECTION BEGINNING PAGE

I. SAFETY INFORMATION 1

II. FURNACE SPECIFICATIONS 6

III. GENERAL INSTRUCTIONS AND CLEARANCES 7

IV. GENERAL INSTALLATION 9

A. FURNACE LOCATION 9

B. BASE INSTALLATION 12

C. ALCOVE INSTALLATION 13

D.CLOSETINSTALLATION 14

E.FUELPIPING 15

F. GENERAL VENTING REQUIREMENTS 16

G. CONNECTING THE EXHAUST VENT, AND COMBUSTION 18

AIR INTAKE

H. DIRECT VENTING THROUGH A SIDEWALL 19

I. INSTALLATION OF OUTSIDE EXHAUST/INTAKE TERMINATIONS 23

J. CONNECTING THE FURNACE TO ROOF VENT/ INTAKE TERMINATIONS 24

K. CONDENSATE DRAIN LINE AND TRAP ASSEMBLY 26

L.ELECTRICALWIRING 27

V. STARTING THE UNIT 32

A. SEQUENCE OF OPERATION 32

B.INITIALSTART-UP 34

C. ADJUSTMENT OF BTU INPUT RATE 35

D. BURNER ADJUSTMENT 36

E. SETTING TEMPERATURE RISE 37

F. FURNACE CHECK-OUT PROCEDURE 38

VI. INSTALLER'S INSTRUCTIONS TO USER 39

VII. DEALER MAINTENANCE 39

A. ELECTRICAL 40

B. GENERAL INSPECTION 40

C. HEAT EXCHANGER 41

D. HOUSE AIR BLOWER 41

E. RETURN AIR FILTER 41

VIII. TROUBLE SHOOTING 42

APPENDIX-A REPLACEMENT PARTS 49

APPENDIX-B WIRING DIAGRAM 51

WARRANTY 52

REFERENCED PUBLICATIONS: FOR COPIES CONTACT:

NATIONAL FUEL GAS CODE NATIONAL FIRE PROTECTION ASSOCIATION

NFPA 54/ANSI-Z233.1 1 BATTERYMARCH PARK

(LATEST EDITION) P.O. BOX 9101

QUINCY, MA 02269-9101

All installations and services must be performed by qualified service personnel.

I. SAFETY INFORMATION

This and the following page contain reproductions of the various warning and instruction

labels placed on the Thermo Pride Condensing Gas Furnaces. Please read and comply

with the contents of these labels.

All installations and services must be performed by qualified service personnel.

This and the previous page contain reproductions of the various safety and instruction

labels placed on the Thermo Pride Condensing Gas Furnaces. Please read and comply

with the contents of these labels.

All installations and services must be performed by qualified service personnel.

The following safety information should be read, understood, and followed by the

installer.

1. Use only with type of gas approved for this furnace. Refer to furnace rating plate.

2. Do not install this furnace where it could be exposed to drafts or other wind or

moisture conditions. Refer to Section IV of this manual.

3. Provide adequate ventilation air to the furnace space. Refer to Section IV, C and D,

of this manual.

4. Connect this furnace to an approved vent system only. Combustion products must

be carried outdoors. Refer to Section IV, F thru J, of this manual.

5. Never test for gas leaks with an open flame. Leak test methods must comply with

State, Local and National codes including the National Fuel Gas Code NFPA 54/ANSI-

Z233.1 (Latest Edition).

6. Always install furnace with a duct system that has an external static pressure within

the allowable range referenced in specifications.

7. Make sure supply air ducts are completely sealed to the furnace casing. Refer to

Section IV.

The following pages contain various warnings and cautions found throughout the

Thermo Pride Gas Fired High Efficiency Furnace Manual. Please read and comply

with the statements below.

: This furnace is not to be used for temporary heating of buildings or

structures under construction.

: These high efficiency condensing furnaces are not certified for and

shall not be vented into a standard or any type of chimney.

: Negative pressure inside the closet with closet door closed and the

furnace blower operating on high speed shall be no more negative than minus

0.05 inch water column.

: Do not obstruct any return air openings, including the return grille on

the furnace. To do so may cause the furnace to activate the high limit and shut

down.

All installations and services must be performed by qualified service personnel.

: The vent and air intake elbows must be kept away from bushes,

shrubs or any vegetation that may restrict the flow of flue products. It must also

be kept clear of any leaves, weeds or other combustible materials. Keep the vent

hood clear of snow. Avoid locating the terminals in areas where standing water or

condensate drippage may be a problem.

: This CMA furnace has been designed to be installed as a direct vent

system and must have its combustion air brought in from outside the conditioned

space. The failure to install the vent/air intake system as specified in these

instructions will void the heat exchanger warranty and may result in property

damage, personal injury or loss of life.

: Outside combustion air must not come from an area that is directly

adjacent to a pool, hot tub or spa. Measures should be taken to prevent the entry

of corrosive chemicals or vapors to the combustion and ventilation air supply.

Such chemicals include but are not limited to chlorinated and/or fluorinated

hydrocarbons such as found in refrigerants, aerosol propellants, dry cleaning

fluids, degreasers and removers. Other harmful compounds may come from

bleaches, air fresheners or mastics. Vapors from such products can form acid

compounds when burned in a gas flame. Should acid compounds form in your

furnace, it may reduce the life of the furnace.

: Because of the potential of odorant fade, a gas leak may not be

detected by smell. If this furnace is installed below grade, contact your gas

supplier for a gas detector.

: All gas piping must be leak tested methods approved by State, Local

and National Codes including the National Fuel Gas Code NFPA 54/ANSI-Z233.1

(Latest Edition). A final test for gas leakage must be made after purging the gas

line. This test must be conducted with the unit operating and should include the

furnace piping and gas valve. Never use an open flame to check for a gas leak.

: Care must be taken not to wet electronic components during leak test.

Wetting the primary ignition module may damage its circuitry and cause a

hazardous situation. Dry moisture from all leads and terminals if wetting occurs.

Wait at least 24 hours for the circuit to fully dry before energizing the burner

circuit.

: The furnace and its individual gas shutoff valve must be disconnected

from the gas supply during pressure testing of the gas supply system at

pressures in excess of 1/2 PSIG or 14.0" w.c. The furnace must be isolated from

the gas supply by closing its manual shut off valve at test pressures equal to or

greater than 1/2 PSIG or 14.0" w.c.

All installations and services must be performed by qualified service personnel.

: Copper and brass tubing and fittings (except tin lined) shall not be

used if the gas contains more than a trace (0.3 grains per 100 cubic ft.) of

hydrogen sulfide gas. Check with your gas supplier.

: TURN OFF THE ELECTRICAL POWER to the furnace before attempting

to change blower speed wiring.

: Turn off power to furnace before it is placed into service. The gas

piping system must have been leak tested by a qualified heating contractor in

accordance with State, Local and National Codes including the National Fuel Gas

Code NFPA 54/ANSI-Z233.1 (Latest Edition).

: It may be necessary to purge the air out of the gas line for initial start-

up of the furnace after installation. This should be done by a qualified heating

contractor. If excessive gas escapes when purging the gas supply at the union,

allow the area to ventilate for at least 15 minutes before attempting to start the

furnace. LP gas is especially dangerous because the specific gravity of LP gas

allows it to accumulate at floor level at a dangerous concentration.

: Heat exchanger oil will burn off on initial firing creating an unpleasant

odor. To prevent this odor from occurring more than once, it is suggested that:

1. A window(s) be opened.

2. The thermostat set at highest setting.

3. The furnace remain running at conditions 1&2 above for 15 minutes or until

odor has dissipated.

: The CMA furnace models are of direct vent design and do not require

an air shutter adjustment (air shutters are not used) for proper flame

characteristics. Burner box access cover must always be secured with all screws

in place and tightened before operating furnace.

: Personal injury or property damage could result from repair or service

of this furnace by anyone other than a qualified heating contractor.

: Label wires prior to disconnection when servicing controls. Wiring

errors can cause improper and dangerous operation.

: The inducer motor mounting plate gasket and the collector box gasket

must be replaced if they show any sign of having been damaged.

: Power must be disconnected before servicing.

All installations and services must be performed by qualified service personnel.

II. FURNACE SPECIFICATIONS - CMA SERIES

MODEL CMA1-50 CMA2-75

INPUT IN BTUH 50,000 75,000

OUTPUT IN BTUH 48,000 72,000

MAIN ORIFICE-NAT.

MAIN ORIFICE-LP

GAS SUPPLY PRESSURE

L.P. MINIMUM

NAT. MINIMUM

L.P. MAXIMUM

NAT. MAXIMUM

GAS MANIFOLD PRESSURE

L.P.

NAT.

INTAKE SIZE IN INCHES

VENT SIZE IN INCHES

NOMINAL TEMPERATURE RISE

SEASONAL EFFICIENCY (AFUE*)

*ANNUAL FUEL UTILIZATION EFFICIENCY

DIMENSIONS

CABINET SIZE

SUPPLY AIR OUTLET

ELECTRICAL SUPPLY

FUSE OR HACR BREAKER

TOTAL CURRENT AMPS

NOMINAL ANTICIPATOR SETTING

FILTER SIZE

APPROXIMATE SHIPPING WEIGHT

BLOWER DATA

BLOWER MODEL

MOTOR HORSEPOWER

MOTOR RPM

CFM @ .2 & .5 IN. W.C. SPEED .2” .5” |.2” .5”

LOW 805 695 | 797 668

MD-LOW 1010 860 | 995 869

MD-HIGH 1196 1038 | 1210 1076

HIGH 1338 1162 | 1420 1259

FOR BURNER COMBUSTION INFORMATION REFER TO INITIAL STARTUP.

2”

11” IN.W.C.

4.5”IN.W.C.

14” IN.W.C.

#42

1.5 mm

115 VOLTS-- 60HZ --1/PH

15 AMPS

55°F

95%

WIDTH 18” DEPTH 25-3/4" HEIGHT 57"

WIDTH 12” DEPTH 12"

10.0” + .03 IN.W.C.

3.5” + .03 IN. W.C.

12-9T DIRECT DRIVE

1/2

1065 (HIGH SPEED)

7.15 AMPS

0.8 MILLIAMPS

(1) 18” X 24” X 1”

175 LBS.

All installations and services must be performed by qualified service personnel.

INSTALLATION PARTS PACKAGE

CMA*-50 CMA*-75

S00S4179 S00S4114

PART # QTY PART # QTY

J-box cover 350020 1 350020 1

wire nut 300132 2 300132 2

3" stainless steel hose clamp 300276 4 300276 4

2-3/8" radiator hose 410017 2 410017 2

CPVC adapter 320833 1 320833 1

LP conversion kit AOPS7677 1 AOPS7678 1

PARTS PKG#

DESCRIPTION

III. GENERAL INSTRUCTIONS AND CLEARANCES – READ BEFORE START OF

INSTALLATION

1. The BTU output capacity of the furnace proposed for installation should be based

on a heat loss calculation made according to the manuals provided by the Air

Conditioning Contractors of America (ACCA) or the American Society of Heating,

Refrigeration and Air Conditioning Engineers, Inc. (ASHRAE).

2. This furnace is equipped with orifices sized for operation with natural gas. For

conversion to Propane Gas see instruction MG-799 in Gas Conversion Kit

AOPS7678.

3. These Category Type IV furnaces are shipped completely assembled and wired

(internally). See the Dealer Receiving and Freight Claim Procedure Section of the

price guide for parts shortage or damage. The furnace and duct system must be

adjusted to obtain a temperature rise of 40°F to 70°F through the furnace after

installation. (See rating label located on separator panel inside the furnace

vestibule). The installation must conform with local codes, or in the absence of local

codes, with the National Fuel Gas Codes (ANSI Z223.1 or latest edition) and with

these instructions.

: This furnace is not to be used for temporary heating of buildings or

structures under construction.

Many of the chemicals used during construction, when burned, form acid bearing

condensate that can substantially reduce the life of the heat exchanger.

4. It is recommended that a commercially available CO alarm be installed in

conjunction with any fossil fuel burning appliance. The CO alarm shall be installed

according to the alarm manufacturer’s installation instructions and be listed in

All installations and services must be performed by qualified service personnel.

accordance with the latest edition of the UL Standard for Single and Multiple Station

Carbon Monoxide Alarms, UL 2034, or the CSA International Standard, Residential

Carbon Monoxide Alarming Devises, CSA 6.19.

5. The installer shall be familiar with and comply with all codes and regulations

applicable to the installation of these heating appliances and related equipment. In

lieu of local codes, the installation shall be in accordance with the current provisions

of one or more of the following standards.

a. Federal Manufactured Home Constructions & Safety Standard (H.U.D. Total

24, Part 280.)

b. American National Standard (ANSI-119.2/NFPA-501C) for all recreational

vehicle installations.

c. American National Standard (ANSI-Z223.1/NFPA-54) for all gas-fired

furnaces.

d. American National Standard (ANSI-C1/NFPA-70 Electric Code for all

electrical field wiring.

e. These gas-fired units have been investigated under standards ANSI Z 21.47

CAN/CGA Z223-2001 Central Furnace test standards.

f. These gas-fired units have been listed by ETL “For installation as central

furnace special type for single story dwelling.”

:The area around the furnace must be kept free and clear of

combustible materials, especially papers and rags.

:This furnace is not to be used as a construction heater.

Listed below are definitions of “ COMBUSTIBLE MATERIAL” and “NON-

COMBUSTIBLE MATERIAL.”

COMBUSTIBLE MATERIAL:

Material made of or surfaced with wood, compressed paper, plant fibers, plastics or

other material that will ignite.

NON-COMBUSTIBLE MATERIAL:

Material that will not ignite and burn. Such materials consist entirely of steel, iron, brick,

tile, concrete, slate, glass or a plaster combination thereof.

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