Page 3 - I. SAFETY INFORMATION
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...
Page 8 - MODEL; GAS SUPPLY PRESSURE; DIMENSIONS
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. MAX...
Page 9 - INSTALLATION PARTS PACKAGE; structures under construction.
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 41...
Page 10 - COMBUSTIBLE MATERIAL:
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 in...
Page 11 - MODELS CMA; CLOSET ALCOVE; Table 1; connect a ducted return air system directly to the furnace.
All installations and services must be performed by qualified service personnel. MODELS CMA CLOSET ALCOVE FRONT BACK SIDES VENT CONNECTOR(PVC) TOP PLENUM SIDES TOP AND SIDES OF DUCT BOTTOM OF DUCT 6” 0” 0” 0” 0” 1” 1” 1” 18” 0” 0” 0” 0” 1” 1” 1” Table 1 This heating appliance must be installed with ...
Page 12 - This cabinet cannot be utilized as a cottage base.; Figure
All installations and services must be performed by qualified service personnel. Combustible Floor Base Model: 70-BASE Figure 1A. Coil Cabinet Model: CE113S Note: This cabinet cannot be utilized as a cottage base. Figure 1B. 10
Page 15 - must; be provided to the front of the unit. See Figure 4.
All installations and services must be performed by qualified service personnel. connector duct. Remove the bottom panel. Cut an opening in the distribution duct slightly larger than the connector duct. (refer to Figure 2 for location of this cut.) Cut the connector duct to length. Install the conne...
Page 16 - D. CLOSET INSTALLATION; The return air opening into the closet; minimum; Do not obstruct any return air openings, including the return
All installations and services must be performed by qualified service personnel. D. CLOSET INSTALLATION 1. The return air opening into the closet is to have a minimum free area of 250 sq. in. (see Figure 5). 2. The return air opening may be located in the top, center or (ideally) bottom of the close...
Page 18 - The furnace and its gas valve must be disconnected from the; F. GENERAL VENTING REQUIREMENTS; All CMA furnaces must be installed
All installations and services must be performed by qualified service personnel. : The furnace and its gas 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 inches w.c F. GENERAL VENTING REQUIREMENTS The CMA furna...
Page 19 - MAXIMUM VENT LENGTH; VENT SIZE; Table 2; The CMA furnace models are vented through the roof. For
All installations and services must be performed by qualified service personnel. MAXIMUM VENT LENGTH VENT SIZE 2 IN. PVC FURNACE MODEL VENT LENGTH (FT.) EXHAUST VENT ELBOWS (NO.) COMBUSTION AIR INTAKE ELBOWS (NO.) CMA 30 8* 7** *Note the drain elbow supplied with CMA furnaces count as 1 elbow. **Not...
Page 20 - G. CONNECTING THE EXHAUST VENT AND COMBUSTION AIR INTAKE; The exhaust vent pipe must be supported every 4 feet. After making
All installations and services must be performed by qualified service personnel. G. CONNECTING THE EXHAUST VENT AND COMBUSTION AIR INTAKE Figure 6. shows the typical exhaust vent and combustion air intake connection for CMA furnace. Figure 6. (CMA*-75 SHOWN) NOTICE: The exhaust vent pipe must be sup...
Page 21 - For sidewall instructions, continue to the following section.; Vent And Combustion Air Pipes
All installations and services must be performed by qualified service personnel. NOTICE: The furnace model series CMA may be vented either through the sidewall or the roof. For sidewall instructions, continue to the following section. For roof venting, refer to Section IV J, of this manual. NOTICE: ...
Page 22 - a. The exhaust vent termination must be installed in the same
All installations and services must be performed by qualified service personnel. Figure 7: Proper Direct Vent Terminations (RH & LH views) and Vent Termination Only w/o Outside Combustion Air Intake (RH view) NOTICE: If exterior sidewall building materials are subject to degradation from contact...
Page 23 - c. The vent terminal shall; not
All installations and services must be performed by qualified service personnel. Figure 8: Typical Relative Locations of Direct Vent Terminations When Sidewall Venting 3. Exhaust Vent Terminal Location Clearance Requirements a. The vent terminal shall be located at least 3-feet above any forced air ...
Page 24 - Building Features
All installations and services must be performed by qualified service personnel. Figure 9: NFGC Minimum Clearances Between the Vent Terminal and Various Building Features 22
Page 25 - Vent Terminal Location Guidelines; : Bushes, shrubs, or any vegetation that may restrict the flow of; I. Installation Of Outside Exhaust / Intake Terminations; passage
All installations and services must be performed by qualified service personnel. 4. Vent Terminal Location Guidelines : Bushes, shrubs, or any vegetation that may restrict the flow of flue products must be kept away from vent and air intake terminations. Terminations must also be kept clear of any l...
Page 26 - Follow instructions included with concentric vent kit AOPS7483.
All installations and services must be performed by qualified service personnel. inlet as shown in Figure 10, making sure that the spacing between the inlet and outlet complies with that noted in Figure 8. Figure 10: Typical Construction Details of Sidewall Vent and Air Intake Terminations 3. Finish...
Page 29 - c. Connect the “hot” wire to the black wire; Connection Of Room Thermostat Wires
All installations and services must be performed by qualified service personnel. 3. An optional condensate pump (P/N 350225) is available. This pump will not fit into the vestibule of the furnace and must be installed below the furnace for operation. Instructions will be included with pump if this o...
Page 30 - black
All installations and services must be performed by qualified service personnel. NOTE: Class 1 thermostat wire must be used inside the furnace burner compartment. a. Insert 24 VAC wires through the plastic grommet on the left side of the furnace casing. b. Connect the thermostat wires to the W/R 50A...
Page 31 - The furnace must be grounded in accordance with local codes; BLOWER DELAY SETTINGS
All installations and services must be performed by qualified service personnel. mounted junction box. The hot leg must pass through the disconnect switch in all cases to prevent the hazard of electrical shock when servicing. IMPORTANT: The furnace must be grounded in accordance with local codes and...
Page 32 - COOLING UNIT
All installations and services must be performed by qualified service personnel. CMA1-50 ALTERATIONS REQ’D FOR A/C @ DESIGN EXTERNAL STATIC PRESSURE COOLING UNIT HTG Speed Recommended CLG Speed 24,000 LOW MED-LOW 30,000 LOW MED-HIGH 36,000 LOW HIGH Furnace Airflow (CFM) vs. External Static pressure ...
Page 38 - Seconds for one revolution
All installations and services must be performed by qualified service personnel. C. ADJUSTMENT OF BTU INPUT RATE: The orifice for this furnace was sized: 1) for natural gas having a heating value of 1025 BTU per cubic foot and a specific gravity of .65, or 2) for liquefied propane gas with a heating...
Page 40 - The CMA furnace models are direct vent design and do not; E. SETTING TEMPERATURE RISE; F. The blower motors
All installations and services must be performed by qualified service personnel. flames should be clear, blue and almost transparent in color. (see Figure 16). NOTE: It is not unusual to have orangish flames visible in the tube for LP gas. Figure 16. : The CMA furnace models are direct vent design a...
Page 41 - F. FURNACE CHECKOUT PROCEDURE; Remove blockage or reconnect blower motor and restore power.
All installations and services must be performed by qualified service personnel. control, with one of the higher speed blower leads attached to a terminal marked “Park”. Be sure to attach any unused blower leads to a terminal marked “Park”. Replace the blower door and turn on the power supply. F. FU...
Page 43 - assembly. Assembly must be pulled & tilted away from the blower
All installations and services must be performed by qualified service personnel. A. ELECTRICAL: 1. Check diagnostic code through view port prior to removing access door. 2. Check all wiring for loose connections and any signs of damage or unusual wear. 3. Check for correct voltage at the furnace whe...
Page 44 - CLEANING THE COIL AIR SIDE; The inducer motor mounting plate gasket and the collector box; D. HOUSE AIR BLOWER; Some motors are permanently lubricated; and should not be; See motor name plate for specific instructions.; E. RETURN AIR FILTER
All installations and services must be performed by qualified service personnel. 5. GASKETS/SEALING MATERIALS Inspect all visible gaskets for signs of degradation or liquid seepage, especially any seals which were removed as part of the inspection. Replace any suspect gaskets. C. HEAT EXCHANGER Insp...
Page 45 - FILTER MAINTENANCE PROCEDURE; Remind homeowner of importance of monthly filter inspections
All installations and services must be performed by qualified service personnel. FILTER MAINTENANCE PROCEDURE The filter is located inside front door of the CMA. Remove filter retaining rod and remove dirty filter. Clean the filter by vacuuming, rinsing with tap water, hosing or dipping in an ordina...
Page 46 - The LED will also flash once at power-up.; : Power must be disconnected before servicing.
All installations and services must be performed by qualified service personnel. 3 flashes, then pause pressure switch stuck open 4 flashes, then pause open high limit switch 6 flashes, then pause 115 volt AC power reversed 7 flashes, then pause low flame sense signal 8 flashes, then pause check ign...
Page 52 - APPENDIX – A REPLACEMENT PARTS
All installations and services must be performed by qualified service personnel. APPENDIX – A REPLACEMENT PARTS 50
Page 54 - APPENDIX – B WIRING DIAGRAM
All installations and services must be performed by qualified service personnel. APPENDIX – B WIRING DIAGRAM 52