Thermo Pride CDX3-100N Installation And Operation Manual Download Page 60

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

DOES BURNER SHUT OFF

WHEN THERMOSTAT IS

SATISFIED?

CHECK FOR 24 VOLTS

AT GAS VALVE.

REPLACE GAS VALVE

CHECK FOR SHORT IN WIRE TO

THERMOSTAT AND CORRECT

IF NECESSARY.

DOES THE CIRCULATING

AIR BLOWER TURN OFF

AFTER THERMOSTAT IS

SATISFIED WITHIN

120 SECONDS?

TROUBLE SHOOTING COMPLETE

YES

REFERENCE ECM

OPERATION MANUAL

Summary of Contents for CDX3-100N

Page 1: ...T USE ANY PHONE IN YOUR BUILDING LEAVE THE BUILDING IMMEDIATELY IMMEDIATELY CALL YOUR GAS SUPPLIER FROM A NEIGHBOR S PHONE FOLLOW THE GAS SUPPLIER S INSTRUCTIONS IF YOU CANNOT REACH YOUR GAS SUPPLIER...

Page 2: ...ied service personnel I SAFETY INFORMATION This and the following page contain reproductions of the various warning and instruction labels placed on the Thermo Pride Two Stage Condensing Gas Furnaces...

Page 3: ...TOP Follow B in the safety information above on this label If you don t smell gas go to the next step 7 Move the gas control switch to the ON position 8 Turn on all electric power to the appliance 9 S...

Page 4: ...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...

Page 5: ...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 fr...

Page 6: ...PE SIDEWALL VENTING OPTION 15 F INSTALLATION OF OUTSIDE VENT AIR INTAKE TERMS 15 G CONNECTING FURNACE TO ROOF VENT AIR TERMS 17 H CONNECTING FURNACE TO VENT AIR INTAKE TERMS 18 I CONDENSATE DRAIN LINE...

Page 7: ...M from 2 5 w c EXTERNAL STATIC PRESSURE COOLING COOLING COOLING COOLING TAP A 1000 1200 1400 COOLING TAP B 800 1000 1200 COOLING TAP C 1200 1400 1600 COOLING TAP D 1400 1600 2000 HEATING HEATING HEATI...

Page 8: ...1200 1400 COOLING TAP B 800 1000 1200 COOLING TAP C 1200 1400 1600 COOLING TAP D 1400 1600 2000 HEATING HEATING HEATING HEATING TAP C High fire Low fire 1012 826 1340 1094 1673 1366 TEMPERATURE RISE 6...

Page 9: ...0016 1 Drain hose grommet 350446 1 Spring clamp 11 16 300299 3 Installation notice MG 987 1 PVC tee assembly 2 dia 320818 1 CPVC XPVC adapter 320833 1 Gas Conversion Kit AOPS7682 1 INSTALLATION PARTS...

Page 10: ...r washer 300270 1 Grounding instructions MG 966 1 Wire nut 300132 2 3 stainless steel hose clamp 300276 2 J box wire bushing 350016 1 Drain hose grommet 350446 1 Spring clamp 11 16 300299 3 Installati...

Page 11: ...steel hose clamp 300276 2 J box wire bushing 350016 1 Drain hose grommet 350446 1 Spring clamp 11 16 300299 3 Installation notice MG 987 1 PVC tee assembly 2 x 3 dia 320817 1 PVC tee assembly 2 dia 3...

Page 12: ...ANCES The following items must be considered when choosing the size and location of the furnace 1 All local codes and or regulations take precedence over the instructions in this manual and should be...

Page 13: ...er If the area becomes wet or damp at times the furnace should be raised above the floor using a concrete base bricks patio blocks etc NOTICE Ensure furnace is level after installation to ensure prope...

Page 14: ...ide of the house air blower must be moved to the bracket on the opposite left side of the blower See Figure 1 NOTE When the CDX3 is installed as horizontal unit it is imperative that the auxiliary lim...

Page 15: ...orm to the National Fuel Gas Code NFPA 54 ANSI Z223 1 2002 or latest edition thereof Installation shall at least conform to the following requirements 1 The exhaust vent combustion air intake terminat...

Page 16: ...nation Furthermore a credit of 5 feet of straight pipe may be taken for each elbow up to maximum of three 3 elbows which is dropped from the maximum permissible number for each system Table 2 Maximum...

Page 17: ...lated with 1 inch thick foil faced fiberglass insulation or equivalent to prevent freezing of condensate within the pipe 12 No clearance is required from the outer surface of the thermoplastic piping...

Page 18: ...een the inlet and exhaust terminations should be minimized when possible and should never exceed 24 inches d The vent and intake systems should utilize the same numbers of elbows and approximately the...

Page 19: ...r could create a nuisance hazard or cause property damage and where wetting of components by condensate or water vapor could be detrimental to the operation of pressure regulators relief valves or any...

Page 20: ...installations and services must be performed by qualified service personnel Figure 4 NFGC Minimum Clearances Between the Vent Terminal and Various Building Features Vent Terminal Location Guidelines...

Page 21: ...nger failure accelerated by contaminated combustion air will void the furnace heat exchanger limited lifetime warranty This furnace may be horizontally i e sidewall vented using an exhaust vent pipe a...

Page 22: ...with that noted in Figure 3 Figure 5 Typical Sidewall Vent and Air Intake Termination Construction Details 3 Finish the vent installation by caulking the annulus to seal around the two 2 holes where t...

Page 23: ...nted through the roof Installation shall conform to the following guidelines which are illustrated in Figure 6A below 1 The outlet of the exhaust vent and the inlet of the combustion air intake i e th...

Page 24: ...Drain Connections At Furnace 1 Figures 6B 7 and 8 follow depicting typical exhaust vent and air intake connections for the furnace model series CHX3 and the CDX3 respectively as well as a list of req...

Page 25: ...All installations and services must be performed by qualified service personnel Figure 7 Required Exhaust Vent and Air Intake Piping for CDX3 Furnace in Downflow Applications 19...

Page 26: ...nch length of reinforced rubber hose used as a coupling within the casing of the furnace Cut the measured lengths of 2 inch diameter PVC pipe being sure to allow a sufficient length of pipe for connec...

Page 27: ...diame PVC elbow for the model series CDX3 in horizontal applications a 2 inch diameter PVC tee over the inducer outlet flange Drive one 1 8 x 3 4 inch sheet metal screw with black protective coating...

Page 28: ...box Measure the length of pipe needed to clear the casing Be sure to allow sufficient length to account for insertion of the pipe into the elbow at the burner box and the elbow or coupling fitting on...

Page 29: ...s in place except the length of pipe between the combustion air fitting on the burner box and the first fitting e If the combustion air piping is installed in a warm humid place such as a laundry room...

Page 30: ...All installations and services must be performed by qualified service personnel Figure 15 TRAP ASSEMBLY MOUNTED ON CDX3 Figure 16 TRAP ASSEMBLY MOUNTED ON CDX3 RIGHT SIDE HORIZONTAL INSTALLATION 24...

Page 31: ...rovided and remove any extra length making sure that the hose has sufficient length not to kink or otherwise be restricted once installed Attach the drain hose 11 16 o d clear tubing to the other side...

Page 32: ...piped through either the left or right side by using a street elbow and a straight pipe For the purposes of service it is recommended that the gas union be located inside the furnace when possible Fi...

Page 33: ...be installed parallel with or on the upstream side of the coil to prevent condensation in the heat exchanger If the evaporator coil is installed with a parallel flow arrangement dampers or other mean...

Page 34: ...lier s catalog for proper sizing of outlet and return air registers to insure that the register will meet the CFM requirements of the run to which it is connected The main trunk lines take offs regist...

Page 35: ...ogether to ensure the necessary air handling capacity of a duct system A 12 x 8 duct with a 400 CFM capacity for example will not flow 400 CFM if the register s to which it connects only flow a total...

Page 36: ...casing one inch up from the bottom of the furnace and centered from side to side Place the securing flange against the casing for locating the return air opening Figure 19 PLEASE NOTE While scribing t...

Page 37: ...328 IN 2 402 IN 2 STANDARD PERMANENT FILTER 500 FT MIN 304 IN 2 394 IN 2 484 IN 2 DISPOSABLE TYPE FILTER 300 FT MIN 506 IN 2 656 IN 2 804 IN 2 The Thermo Products supplied filter can be cut to size to...

Page 38: ...ction in this junction box A green screw and a strain relief are provided in order to connect the power supply ground wire and provide strain relief for the 115 volt power leads from the furnace in th...

Page 39: ...s how the control calculates staging based on demand Table 4A Average Calculated Duty Cycle Equals or is less than Low to High Stage Delay Demand 0 38 12 Min Light 38 50 10 Min Light to Average 50 62...

Page 40: ...POWER to the furnace before attempting to disconnect blower wiring Table 4B Options S7 1 S7 2 Time Off Off Off On Off 10 Min Off On Auto On On 20 Min S7 3 S7 4 Time Off Off 90 Sec Off On 120 Sec On Of...

Page 41: ...ECM motor in conjunction with the W R 50V51 843 has a feature to enhance de humidification in the cooling mode In the dehumidify mode the indoor blower motor ECM reduces CFM By reducing airflow the i...

Page 42: ...IS NOT ENERGIZED A SEQUENCE OF OPERATIONS THERMOSTAT CALLS FOR HEAT W1 OR W1 W2 CONTACTS CLOSE LOW FIRE PRESSURE SWITCHES SENSES ADEQUATE DIFFERENTIAL PRESSURE CONTACTS CLOSE IV STARTING THE UNIT INDU...

Page 43: ...ER IGNITOR WARM UP THE 36J54 GAS VALVE IS ENERGIZED TO OPEN ON LOW FIRE SETTING IF FLAME IS NOT DETECTED THE GAS VALVE IS DE ENERGIZED THE IGNITOR IS TURNED OFF AND THE 50V51 843 CONTROL GOES INTO RET...

Page 44: ...NDS CIRCULATING AIR FAN IS ENERGIZED AT LOW FIRE HEATING SPEED OR HIGH FIRE IF W2 IS ENERGIZED THE OPTIONAL ELECTRONIC AIR CLEANER AND HUMIDIFIER ARE ENERGIZED IF THERMOSTAT W2 CONTACTS ARE CLOSED OTH...

Page 45: ...n system OPERATING INSTRUCTIONS 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 See Section III J of these...

Page 46: ...y at the appliance service manual gas shutoff valve or for LP gases shut off the gas at the storage tank service valve BEFORE removing the a gas valve inlet pressure tap plug b manometer or gauge and...

Page 47: ...e Either device is referred to below as a pressure gauge NOTICE This 2 stage gas valve has two separate gas pressure regulators Checks and adjustments must be made at both high fire high adjustment an...

Page 48: ...gas pass through the meter for reasons of accuracy When more than one 1 cubic foot of gas is consumed divide the total time by the number of cubic feet for comparison to the figures in Table 6 10 Comp...

Page 49: ...High Fire CHX Low Fire CDX Low Fire High Fire CHX Low Fire CDX Low Fire Normal Manifold Pressure in W G 10 0 0 3 4 8 0 3 5 6 0 3 3 5 0 3 1 8 0 3 2 0 0 3 Maximum Gas Supply Pressure in W G 14 0 14 0 M...

Page 50: ...ry consult your gas supplier or qualified heating contractor for recommendations to alleviate the problem 19 Turn off the gas at the manual gas shutoff valve turn handle to the OFF position 20 Remove...

Page 51: ...o have yellow or orange colored tips If combustion problems are evident it may indicate problems with either the furnace air supply or the vent system Refer to the installation and maintenance section...

Page 52: ...ls 46 78 1 Determine time for two dial revolutions 47 77 2 Use Table directly 48 75 49 73 For two cubic foot per revolution gas meter dials 50 72 1 Determine time for one complete dial revolutions 51...

Page 53: ...first reduce rate to the low fire setting As the flue becomes more blocked the pressure switch will function and completely shut off the main burners 4 Block the PVC pipe inlet gradually with a flat p...

Page 54: ...ORMED BY QUALIFIED HEATING CONTRACTORS To assist you in troubleshooting this furnace it is equipped with an integrated ignition control with diagnostics These diagnostics evaluate what control system...

Page 55: ...3 1st stage pressure switch stuck open inducer error 4 open limit switch 5 open rollout aux limit 6 pressure switch cycle lockout 7 external lockout retries 8 external lockout recycles 9 grounding or...

Page 56: ...AND IF OK REPLACE INDUCER ASSEMBLY YES YES NO TROUBLESHOOTING GUIDE THE SYSTEM IS STARTED BY SETTING THE THERMOSTAT TO CALL FOR HEAT THE FOLLOWING SHOULD HELP ESTABLISH THE TYPE OF MALFUNCTION OR DEV...

Page 57: ...OPEN CHECK FOR RESTRICTED FILTERS OR DUCT WORK IF ROLL OUT SWITCH OPEN INSPECT FLUE FOR RESTRICTIONS NO CHECK WIRING TO GAS VALVE AND IF OK REPLACE GAS VALVE IS COLLECTOR BOX PRESSURE SWITCH CLOSED Y...

Page 58: ...CER POWER TERMINALS IND HI TO IND N REPLACE THE 50V61 143 CONTROL CHECK CONNECTIONS TO INDUCER IF OK REPLACE INDUCER DOES BURNER STEP TO HIGH FIRE IS THE HIGH FIRE PRESSURE SWITCH CLOSED YES NO YES NO...

Page 59: ...IS RUBBING AGAINST HOUSING OR MOTOR SHAFT IS SPINNING FREELY AND REPAIR OR REPLACE AS NECESSARY DOES SYSTEM RUN UNTIL THERMOSTAT IS SATISFIED CHECK ALL WIRING FOR LOOSE CONNECTIONS NO NO NO NO NO YES...

Page 60: ...HERMOSTAT IS SATISFIED CHECK FOR 24 VOLTS AT GAS VALVE REPLACE GAS VALVE CHECK FOR SHORT IN WIRE TO THERMOSTAT AND CORRECT IF NECESSARY DOES THE CIRCULATING AIR BLOWER TURN OFF AFTER THERMOSTAT IS SAT...

Page 61: ...All installations and services must be performed by qualified service personnel Appendix A Replacement Parts List 1 Replacement parts list for CHX3 75 CHX3 100 and CHX3 125 55...

Page 62: ...All installations and services must be performed by qualified service personnel 56...

Page 63: ...All installations and services must be performed by qualified service personnel 2 Replacement parts list for CDX3 75 CDX3 100 and CDX3 125 57...

Page 64: ...All installations and services must be performed by qualified service personnel All installations and services must be performed by qualified service personnel 58 58...

Page 65: ...All installations and services must be performed by qualified service personnel Appendix B Wiring Diagrams 59...

Page 66: ...All installations and services must be performed by qualified service personnel All installations and services must be performed by qualified service personnel 60 60...

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