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Thermo Pride CMA4-50D36N Installation And Service Manual Download Page 31

 

 

26

  where wetting of components by condensate, or water vapor, could 

be detrimental to the operation 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 structure. 

Figure 9: NFGC Minimum Clearances Between the Vent Terminal and Various 

Building Features 

Summary of Contents for CMA4-50D36N

Page 1: ...ires B timents 3 Site Constructed Residential 3 Site a construit R sidentiel Single Story Dwellings Habitations tage unique PLEASE READ THESE INSTRUCTIONS PRIOR TO INSTALLATION INITIAL FIRING AND BEFO...

Page 2: ......

Page 3: ...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 30 Electrical Wiring 31...

Page 4: ...ocations of Direct Vent Terminations When Sidewall Venting 25 Minimum Clearances Between Vent Terminal and Various Building Features 26 Construction Details of Sidewall Vent and Air Intake Termination...

Page 5: ...ice agency or fuel supplier c AVERTISSEMENT Une installation un r glage un entretien ou une maintenance incorrects peuvent provoquer des blessures ou des dommages mat riels Reportez vous ce manuel Pou...

Page 6: ...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 7: ...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 8: ...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 9: ...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 10: ...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 11: ...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 12: ...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 13: ...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 14: ...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 15: ...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 16: ...oducts in the primary 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 instr...

Page 17: ...truction 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...

Page 18: ...rnace may be installed on a combustible floor when utilizing either the No 70 counterflow floor base or CE111S coil cabinet for below the floor duct systems or the cottage base for floor level air dis...

Page 19: ...el CE111S Note Coil cabinet cannot be utilized as a cottage base CE111S Figure 1B Cottage Base Model 01COT BASE For CMA4 models only NOTE Serves as a plenum for single story applications with exposed...

Page 20: ...models 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...

Page 21: ...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 22: ...A4 SERIES CMC2 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 Figure 5 a The return air opening may be located in the to...

Page 23: ...free area of openings in 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...

Page 24: ...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 25: ...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 26: ...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 27: ...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 28: ...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 29: ...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 30: ...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 31: ...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 32: ...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 33: ...hrough the existing roof jack or thru the 3 ceiling roof flashing plate Concentric vent utilizing existing roof jack as a chase Two kits are available depending on the flue pipe diameter of the existi...

Page 34: ...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 35: ...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 36: ...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 furnace...

Page 37: ...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 38: ...33 4 BLOWER MOTOR SPEED WIRING Figure 15...

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: ...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 42: ...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 43: ...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 44: ...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 45: ...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 46: ...SES ADEQUATE DIFFERENTIAL PRESSURE CONTACTS CLOSE CONTROL BOARD ENERGIZED INDUCER ENERGIZED AFTER IGNITOR WARM UP THE GAS VALVE IS ENERGIZED TO OPEN IF FLAME IS NOT DETECTED THE GAS VALVE IS DE ENERGI...

Page 47: ...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 48: ...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 49: ...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 50: ...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 51: ...ture 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...

Page 52: ...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 53: ...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 54: ...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 55: ...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 56: ...furnace VIII TROUBLESHOOTING NOTICE BEFORE TROUBLESHOOTING FAMILIARIZE YOURSELF WITH THE START UP AND CHECKOUT PROCEDURE ALL INSTALLATION AND SERVICES MUST BE PERFORMED BY QUALIFIED HEATING CONTRACTOR...

Page 57: ...power to control pushbutton switch pressed or control fault LED steady ON Any color Control hardware fault detected Slow Green flash No call for heat no active errors Slow Orange flash Call for heat...

Page 58: ...ERLY No CORRECT WIRE CONNECTIONS No Yes Yes No Yes IS THE INDUCER BLOWER OPERATING Yes TROUBLESHOOTING GUIDE THE SYSTEM IS STARTED BY SETTING THE THERMOSTAT TO CALL FOR HEAT THE FOLLOWING SHOULD HELP...

Page 59: ...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 60: ...CIRCULATING 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 EI...

Page 61: ...AND CORRECT IF NECESSARY DOES BURNER SHUT OFF WHEN THERMOSTAT IS SATISFIED No No No Yes Yes Yes Yes Yes IS LED LIGHT ON INTEGRATED CONTROL FLASHING DOES THE CIRCULATING AIR BLOWER TURN OFF AFTER THER...

Page 62: ...57 APPENDIX A REPLACEMENT PARTS...

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Page 66: ...61 APPENDIX B WIRING DIAGRAMS...

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