Thermo Pride CMA3-50D36N, Installation And Service Manual

Page 1: ...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 re...

Page 2: ...ements 25 Vent Terminal Location Guidelines 27 Installation of Outside Exhaust Intake Terminations 27 Connecting the Furnace to Roof Vent Intake Terminations 28 Condensate Drain Line and Trap Assembly...

Page 3: ...rminations 24 Relative Locations of Direct Vent Terminations When Sidewall Venting 25 Minimum Clearances Between Vent Terminal and Various Building Features 26 Construction Details of Sidewall Vent an...

Page 4: ...FORMATION 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...

Page 5: ...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 label...

Page 6: ...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 label...

Page 7: ...nstall 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...

Page 8: ...r 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 odor...

Page 9: ...e 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...

Page 10: ...AFUE 95 ANNUAL FUEL UTILIZATION EFFICIENCY DIMENSIONS CABINET SIZE WIDTH 18 DEPTH 25 3 4 HEIGHT 57 SUPPLY AIR OUTLET WIDTH 12 DEPTH 12 ELECTRICAL SUPPLY 115 VOLTS 60HZ 1 PH FUSE OR HACR BREAKER 15 AMP...

Page 11: ...EL UTILIZATION EFFICIENCY DIMENSIONS CABINET SIZE WIDTH 18 3 4 DEPTH 25 3 4 HEIGHT 76 1 8 SUPPLY AIR OUTLET WIDTH 12 DEPTH 12 ELECTRICAL SUPPLY 115 VOLTS 60HZ 1 PH FUSE OR HACR BREAKER 15 AMPS TOTAL C...

Page 12: ...TION EFFICIENCY DIMENSIONS CABINET SIZE WIDTH 18 3 4 DEPTH 25 3 4 HEIGHT 76 1 8 SUPPLY AIR OUTLET WIDTH 12 DEPTH 12 ELECTRICAL SUPPLY 115 VOLTS 60HZ 1 PH FUSE OR HACR BREAKER 15 AMPS TOTAL CURRENT AMP...

Page 13: ...t drain knock out 330355 1 330355 1 Grommet vinyl 3 8 350040 1 350040 1 Grommet vinyl 7 8 350009 1 350009 1 Screw 8 x 1 2 Tek 300208 6 300208 6 Coil trim panel 619113 1 619113 1 Bushing UB 875 350750...

Page 14: ...ry heat exchanger 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 furnac...

Page 15: ...ted 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...

Page 16: ...e may be installed on a combustible floor when utilizing either the No 70 counterflow floor base or CE113S CE213T coil cabinet for below the floor duct systems or the cottage base for floor level air...

Page 17: ...213T Note Coil cabinet cannot be utilized as a cottage base CE113S CE213T Figure 1B Cottage Base Model 01COT BASE For CMA3 models only NOTE Serves as a plenum for single story applications with expose...

Page 18: ...s only Use the base bottom panel as a template to mark floor opening locations see Figure 2 Cut a square opening in the floor for the supply air connector duct Cut the opening 1 inch larger than the s...

Page 19: ...other hand This assures a tight connection between the base assembly and the connector duct and that the distribution duct will be full size Use high temperature tape and or high temperature silicone...

Page 20: ...e unit See Figure 4 Note access to diagnostic view port CMA3 SERIES CMC1 SERIES Figure 4 D CLOSET INSTALLATION 1 The return air opening into the closet is to have a minimum free area of 250 sq in see...

Page 21: ...the floor or ceiling registers serving the return duct system must be at least 350 square inches At least one register must be located where it is not likely to be covered by carpeting boxes furniture...

Page 22: ...installed within six feet of the gas equipment it serves A union or flanged connection shall be provided directly up stream of the burner to allow burner removal Unions must be of a ground joint type...

Page 23: ...e concentric vent kit NOTE All CMA CMC furnaces must be installed with outside combustion air 3 The flue vent pipe and combustion air pipe must be at least as large as the exhaust vent air intake pipe...

Page 24: ...r intake collar on the burner box The screw securing the sleeve or coupling to the collar is sufficient 7 Use the two radiator hose clamps to connect both the exhaust vent and combustion air vent pipe...

Page 25: ...tion to the top of the furnace Access is gained by removal of two screws in the upper right and left of the furnace The top front access panel is then removed by pulling forward Once the vent connecti...

Page 26: ...air intake pipe must be supported every 4 feet After making sure the length of the piping is correct glue all connections in place except the connection to the burner box If the combustion air piping...

Page 27: ...ion Air Intake RH view NOTICE If exterior sidewall building materials are subject to degradation from contact with flue gases or moisture a minimum 24 inch diameter shield shall be fabricated from sta...

Page 28: ...shall be located at least 3 feet above any forced air inlet located within 10 feet Refer to Figure 9 for a depiction of the minimum required clearances between vent terminations and building features...

Page 29: ...ion of pressure regulators relief valves or any other equipment d The vent terminal shall be installed a minimum of 14 inches from any obstruction and 3 feet from an inside corner of an L shaped struc...

Page 30: ...son for restriction or blockage from foreign material in the exhaust vent or in the air intake piping Clean the air intake and vent terminations when necessary I Installation Of Outside Exhaust Intake...

Page 31: ...vent AOPS7483 can be vented through the ceiling roof either thru the existing roof jack or thru the 3 ceiling roof flashing plate Concentric vent utilizing existing roof jack as a chase Follow instruc...

Page 32: ...air intake shall be installed upwind of the vent outlet when exposed to prevailing winds The exhaust vent and combustion air intake can be a minimum of 3 in and a max of 24 in apart see Figures 11 12...

Page 33: ...Figure 13 Continue installing PVC pipe to exhaust vent and combustion air intake termination as described previously Figure 13 K CONDENSATE DRAIN LINE AND TRAP ASSEMBLY 1 Figure 14 illustrates the ty...

Page 34: ...to the white wire e Connect the ground wire to the green wire f Reinstall and secure the junction box cover with the original mounting screws NOTICE The hot surface igniter and operation of this furn...

Page 35: ...Wire Diameter Maximum Recommended Thermostat Wire Length AWG Feet 24 55 22 90 20 140 18 225 Once the furnace is installed check the thermostat anticipator for proper nominal setting 1 Connect a multi...

Page 36: ...DELAY SETTINGS To delay fan turn on by Set Switch 1 2 15 sec 30 sec 45 sec 60 sec Off Off Off On On Off On On To delay fan turn off by Set Switch 3 4 60 sec 90 sec 120 sec 180 sec On On Off On On Off...

Page 37: ...External Static Pressure in WC 0 1 0 2 0 3 0 4 0 5 0 6 0 7 Low 53 55 57 59 63 71 78 ML 42 44 45 48 51 53 59 MH 35 37 38 40 42 45 49 High 31 33 34 36 38 41 44 Speed Tap Static Pressure Blower Motor Cu...

Page 38: ...urrent Draw Amps vs External Static pressure in WC 0 1 0 2 0 3 0 4 0 5 0 6 0 7 Low 3 1 3 0 2 9 2 8 2 7 2 6 2 5 ML 3 9 3 8 3 6 3 5 3 3 3 2 3 1 MH 4 8 4 6 4 4 4 2 4 1 4 0 3 8 High 5 7 5 5 5 4 5 2 5 1 5...

Page 39: ...External Static Pressure in WC 0 1 0 2 0 3 0 4 0 5 0 6 0 7 Low 53 55 57 59 63 71 78 ML 42 44 45 48 51 53 59 MH 35 37 38 40 42 45 49 High 31 33 34 36 38 41 44 Speed Tap Static Pressure Blower Motor Cu...

Page 40: ...urrent Draw Amps vs External Static pressure in WC 0 1 0 2 0 3 0 4 0 5 0 6 0 7 Low 3 1 3 0 2 9 2 8 2 7 2 6 2 5 ML 3 9 3 8 3 6 3 5 3 3 3 2 3 1 MH 4 8 4 6 4 4 4 2 4 1 4 0 3 8 High 5 7 5 5 5 4 5 2 5 1 5...

Page 41: ...WC 0 1 0 2 0 3 0 4 0 5 0 6 0 7 Low 63 69 78 88 101 114 132 ML 50 53 56 61 67 73 79 MED 44 46 48 51 54 58 63 MH 37 38 40 41 43 45 47 High 31 32 33 34 35 35 37 Speed Tap Static Pressure Blower Motor Cu...

Page 42: ...nal Static pressure in WC 0 1 0 2 0 3 0 4 0 5 0 6 0 7 Low 2 4 2 5 2 5 2 6 2 6 2 7 2 7 ML 2 8 2 9 3 0 3 0 3 1 3 1 3 2 MED 3 6 3 7 3 7 3 8 3 8 3 9 3 9 MH 4 2 4 2 4 3 4 3 4 4 4 5 4 5 High 4 8 4 9 5 0 5 0...

Page 43: ...nused speeds should then be reconnected to the module in the park positions Refer to figure 15 Refer to section II for blower speed and air flow performance for A C installation 5 FIELD WIRING AND REP...

Page 44: ...TS WHEN POWER IS RESTORED PRESSURE SWITCH SENSES ADEQUATE DIFFERENTIAL PRESSURE CONTACTS CLOSE CONTROL BOARD ENERGIZED INDUCER ENERGIZED POWER IS APPLIED TO THE SILICON NITRIDE IGNITOR IGNITOR WARM UP...

Page 45: ...PROOF OF FLAME LOSS INDUCER STARTS 5 SECOND POST SURGE AND OPTIONAL HUMIDIFIER ARE DE ENERGIZED THE DELAY TO FAN OFF PERIOD BEGINS 120 SECONDS IF SYSTEM IS IN LOCKOUT THE MODULE WILL RESET ITSELF AFTE...

Page 46: ...CTIONS 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 i...

Page 47: ...as follows 1 Call your gas supplier and ask for the BTU content heating value of one cubic foot of the gas supplied to the installation area An alternate approach is to assume a value of 1025 BTU Cu...

Page 48: ...s that shown on the rating label if a gas meter is not available for natural gas or the unit is installed on an unmetered propane gas supply Shut off the gas supply to the furnace Remove the pressure...

Page 49: ...re rise through the furnace must fall within a range of 40 F to 70 F for CM 50 s and 50 F to 80 F for CM 75 s If the outlet or supply duct temperature is too high you should check to make sure that yo...

Page 50: ...t above room temperature calling for heat e When temperatures are reached in furnace at limit control setting with blower out of operation burner should shut off f Shut off electrical power IMPORTANT...

Page 51: ...ury property damage and may void the limited warranty on the furnace 6 Review with and encourage the user to read the label reproductions and all warnings and instructions in this manual 7 Recommend t...

Page 52: ...or loosely sealed joints carbon build up Also inspect the outside vent and combustion air terminals and ensure that they are clear and unobstructed 2 CONDENSATE LINE TRAP ASSEMBLY The condensate line...

Page 53: ...nnect b Clean the coil with a vacuum cleaner by going through the blower pan opening being careful not to bend or damage any of the fins c Once all components are cleaned they must be re installed to...

Page 54: ...eration of their furnace VIII TROUBLESHOOTING NOTICE BEFORE TROUBLESHOOTING FAMILIARIZE YOURSELF WITH THE START UP AND CHECKOUT PROCEDURE ALL INSTALLATION AND SERVICES MUST BE PERFORMED BY QUALIFIED H...

Page 55: ...e switch stuck closed 3 flashes then pause pressure switch stuck open 4 flashes then pause open high limit switch 5 flashes then pause loose jumper between 5 11 on molex plug 6 flashes then pause 115...

Page 56: ...OR CONTINUITY PROPER CONNECTIONS No Yes Yes REPLACE TRANSFORMER No Yes Yes No No Yes ARE WIRES CONNECTED PROPERLY No CORRECT WIRE CONNECTIONS No Yes Yes No Yes IS THE INDUCER BLOWER OPERATING Yes IS T...

Page 57: ...CONTROL CHECK THE INTEGRATED CONTROL DIAGNOSTIC LED LAMP RESET BY INTERRUPTING POWER TO CONTROL FOR MORE THAN ONE SECOND IF LED STAYS ON CONTINUOUSLY REPLACE INTEGRATED CONTROL IS THERE VOLTAGE PRESE...

Page 58: ...ULATING AIR BLOWER TERMINALS CIR N HEAT FOR PROPER VOLTAGE REPLACE THE INTEGRATED CONTROL No No Yes DOES THE CIRCULATING AIR FAN COME ON WHEN ENERGIZED No DOES BLOWER SPIN FREELY No CONFIRM IF EITHER...

Page 59: ...TIONS CHECK FOR SHORT IN WIRE TO THERMOSTAT AND CORRECT IF NECESSARY DOES BURNER SHUT OFF WHEN THERMOSTAT IS SATISFIED No DOES THE CIRCULATING AIR BLOWER TURN OFF AFTER THERMOSTAT IS SATISFIED WITHIN...

Page 60: ...LASHES THEN PAUSE LOOSE JUMPER BETWEEN 5 11 ON MOLEX PLUG 6 FLASHES THEN PAUSE 115 VOLT AC POWER REVERSED 7 FLASHES THEN PAUSE LOW FLAME SENSE SIGNAL 8 FLASHES THEN PAUSE CHECK IGNITOR OR IMPROPER GRO...

Page 61: ...58 APPENDIX A REPLACEMENT PARTS...

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Page 65: ...62 APPENDIX B WIRING DIAGRAMS...