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

IF SYSTEM IS IN LOCKOUT, 

THE MODULE WILL RESET 

ITSELF AFTER 60 MINUTES 

OR MAY BE MANUALLY 

RESET BY INTERRUPTING 

THE POWER TO THE FURNACE 

AT THE DISCONNECT OR 

INTERRUPTING THE CALL FOR 

HEAT AT THE THERMOSTAT.  

IF THIS DOES NOT RESTART 

THE SYSTEM, REFER TO THE

TROUBLESHOOTING SECTION 

OF THIS MANUAL.

AFTER THE DELAY-TO-FAN-OFF

PERIOD ENDS, THE CIRCULATING

AIR FAN AND (OPTIONAL) ELECTRONIC

AIR CLEANER ARE DE-ENERGIZED.

AFTER DELAY-TO-FAN-ON PERIOD 

ENDS (45 SECONDS), 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

OTHERWISE

CALL

FOR

HIGH

FIRE

NO CALL

FOR 

HIGH FIRE

THERMOSTAT CLOSES W2 

CALLING FOR HIGH FIRE 

HEATING.  

GAS VALVE, INDUCER AND 

AIR FAN ARE ENERGIZED 

TO HIGH FIRE SETTINGS

WHEN THERMOSTAT W1 IS SATISFIED,

CONTACTS OPEN AND THE GAS 

VALVE IS DE-ENERGIZED. AFTER 

PROOF OF FLAME LOSS, INDUCER 

STARTS 5 SECOND POST PURGE 

AND (OPTIONAL) HUMIDIFIER IS 

DE-ENERGIZED.  THE DELAY-TO-

FAN-OFF PERIOD BEGINS (120 SECONDS)

WHEN THERMOSTAT HAS 

SATISFIED W2, CONTACTS 

OPEN AND THE GAS VALVE 

AND AIR FAN HIGH FIRE 

SETTINGS ARE DE-ENERGIZED

AFTER 30 SECOND DELAY.

 

38 

Содержание CDX3-100N

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

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

Страница 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...

Страница 67: ......

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