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DUAL-FUEL OPERATION IN COMMU-
NICATING MODE

Systems configured for dual-fuel opera-
tion will include a communicating con-
denser with a reversing valve.  Dual-
fuel systems will display “HP” for Heat-
Pump heat operation at the furnace
control’s (I.F.C.) dual seven-segment
displays.  During defrost mode, “dF” will
be displayed.  All other codes apply.

The balance point can be adjusted at
the thermostat for optimal operation.
The balance point is the point below
which gas heat will be used and above
which heat-pump heat will be used.

100 PRCNT TEST – (S4-2 = OFF
and S4-3 = ON) Represents the
mode of operation which will provide
100% heat rate for any heat call –
regardless of the rate transmitted by
the thermostat. This mode ends
automatically after the first 60 min-
utes of operation after power-up.

9. AC HP STG MULT – This allows for

adjustment to the airflow for low-
stage of cooling and heat-pump
operation. See the section of this
manual titled “DIPSWITCH” under
“S5” for details and selections.

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Summary of Contents for RGFG

Page 1: ...g Immediately call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department Do not return to your home until authorized by the gas supplier or fire department DO NOT RELY ON SMELL ALONE TO DETECT LEAKS DUE TO VARIOUS FACTORS YOU MAY NOT BE ABLE TO SMELL FUEL GASES U L recognized fuel gas and CO detectors are rec...

Page 2: ...SCRIPTIONS AND SOLUTIONS TABLE 24 75 90 WIRE DIAGRAM STEPPER SERVO MODULATING VALVE FUEL CODES HA OR HB 91 THERMOSTATS 92 NON COMMUNICATING THERMOSTATS 92 THERMOSTAT WIRING WITH WIRING DIAGRAMS 93 95 APPLICATIONS 96 MODULATING TOUCH SCREEN NON COMMUNICATING THERMOSTAT HC TST412MDMS 96 COMMUNICATING THERMOSTATS 106 HC TST501CMMS PROGRAMMABLE COMMUNICATING THERMOSTAT 108 HC TST550CMMS FULL COLOR PRO...

Page 3: ...said thirty 30 day period a battery operated carbon monoxide detector with an alarm shall be installed 2 APPROVED CARBON MONOXIDE DETECTORS Each carbon monoxide detector as required in accordance with the above provisions shall comply with NFPA 720 and be ANSI UL 2034 listed and IAS certified 3 SIGNAGE A metal or plastic identifi cation plate shall be permanently mount ed to the exterior of the bu...

Page 4: ...E VAPORS WHICH MAY BE PRESENT IN A GARAGE ALSO THE FURNACE MUST BE LOCATED OR PROTECTED TO AVOID PHYSICAL DAMAGE BY VEHI CLES FAILURE TO FOLLOW THESE WARNINGS CAN CAUSE A FIRE OR EXPLOSION RESULTING IN PROP ERTY DAMAGE PERSONAL INJURY OR DEATH USE OF THIS FURNACE IS ALLOWED DURING CONSTRUCTION IF THE FOLLOWING TEMPORARY INSTALLATION REQUIREMENTS ARE MET INSTALLATION MUST COMPLY WITH ALL INSTALLATI...

Page 5: ...pipe intake air no of elbows intake air ft of pipe exhaust pipe no of elbows exhaust pipe TERMINATIONS DIRECT VENT VERTICAL Intake 12 min above roof snow level Correct relationship exhaust to intake VERTICAL CONCENTRIC RXGY E03A Intake 12 min above roof snow level HORIZONTAL STANDARD RXGY D02 D02A D03 D03A Correct relationship exhaust to intake 12 min above grade snow level HORIZONTAL ALTERNATE RX...

Page 6: ...nd 90B and requirements or codes of the local utilities or other authorities having jurisdiction This is available from the following National Fire Protection Association Inc Batterymarch Park Quincy MA 02269 CSA International U S 8501 East Pleasant Valley Road Cleveland Ohio 44131 Canadian installations must be installed in accordance with CSA local installation codes and authorities having juris...

Page 7: ... PREVENT DEPRES SURIZATION OF THE SPACE AND POSSIBLE MIGRATION OF COMBUSTION BYPRODUCTS INCLUDING CARBON MONOX IDE INTO THE LIVING SPACE IMPROPER INSTALLATION OR INSTALLATION NOT MADE IN ACCORDANCE WITH THE CSA INTERNATIONAL CSA CERTIFICA TION OR THESE INSTRUCTIONS CAN RESULT IN UNSATISFACTORY OPERATION AND OR DANGEROUS CONDI TIONS AND ARE NOT COV ERED BY THE UNIT WARRANTY IN COMPLIANCE WITH RECOG...

Page 8: ...FURNACE MUST BE LOCATED OR PROTECTED TO AVOID PHYSICAL DAMAGE BY VEHICLES FAILURE TO FOL LOW THESE WARNINGS CAN CAUSE A FIRE OR EXPLOSION RESULTING IN PROPERTY DAM AGE PERSONAL INJURY OR DEATH 1 IMPORTANT If installing the unit over a finished ceiling or living area be certain to install an auxil iary condensate drain pan under the entire unit Extend this auxil iary drain pan under any evapora tor...

Page 9: ...UST NOT BE INSTALLED DIRECTLY ON CARPET TILE OR OTHER COMBUSTIBLE MATERIAL INSTALLATION ON A COMBUSTIBLE MATERIAL OTHER THAN WOOD FLOORING MAY RESULT IN FIRE CAUSING DAM AGE PERSONAL INJURY OR DEATH GFG upflow furnaces and are designed and certified for installa tion on combustible wood only floors Upflow furnaces are shipped with a bottom closure panel installed When bottom return air is used rem...

Page 10: ...IGURE 4 PHYSICAL DIMENSIONS AND CLEARANCE TO COMBUSTIBLES UPFLOW MODELS RGFG UPFLOW MODELS NOTE For 1800 or more CFM both side returns must be used when not using a bottom return configuration AIRFLOW A039201 10 ...

Page 11: ...w if using any filter other than the factory pro vided filter UPFLOW UNITS 1 Position the unit to minimize long runs of duct or runs of duct with many turns and elbows UPFLOW FURNACE A SOLID METAL BASE PLATE MUST BE INSTALLED IN THE FURNACE BOTTOM WHEN USING SIDE AIR RETURN FAILURE TO INSTALL A BASE PLATE COULD CAUSE THE PRODUCTS OF COMBUS TION TO CIRCULATE INTO THE LIVING SPACE AND CREATE POTENTI...

Page 12: ...MONOXIDE POISONING OR DEATH IF THIS UNIT IS INSTALLED IN A CLOSET THE DOOR MUST BE CLOSED WHEN MAKING THIS CHECK REPLACE THE OVER TEMPERA TURE SAFETY SWITCHES ONLY WITH THE IDENTICAL REPLACE MENT PART IN CANADA PRODUCTS CERTI FIED FOR INSTALLATION AND INTENDED TO BE VENTED WITH PLASTIC VENT SYSTEMS PVC CPVC MUST USE VENT SYS TEMS THAT ARE CERTIFIED TO THE STANDARD FOR TYPE BH GAS VENTING SYSTEMS U...

Page 13: ...he joint with a rag Allow 15 minutes before handling Cure time varies according to fit temperature and humidity NOTE Stir the solvent cement fre quently while using Use a natural bristle one inch wide brush or the applicator supplied with the can IMPORTANT For Proper Installation DO NOT use solvent cement that has become curdled lumpy or thickened DO NOT thin Observe shelf precautions printed on c...

Page 14: ...ilation facilities must not be obstructed IMPORTANT Air for combustion and ventilation must not come from a corrosive atmosphere Any furnace failure due to corrosive elements in the atmosphere is excluded from warranty coverage The following types of installation but not limited to the following REQUIRE OUTDOOR AIR for combustion due to chemical exposures Commercial buildings Buildings with indoor...

Page 15: ...000 100 square inches 105 000 105 square inches 120 000 120 square inches B USING OUTDOOR AIR FOR COMBUSTION IMPORTANT Do not take air from an attic space that is equipped with power ventilation The confined space must communi cate with the outdoors in accordance with Methods 1 or 2 The minimum dimension of air openings shall not be less than 3 inches Where ducts are used they shall be of the same...

Page 16: ...osure see Table 6 and b Not less than the sum of the areas of all vent connectors in the confined space If the unit is installed where there is an exhaust fan sufficient ventilation must be provided to prevent the exhaust fan from creating a negative pressure FIGURE 7 AIR FROM ATTIC CRAWL SPACE FIGURE 8 OUTSIDE AIR USING A HORIZONTAL INLET OUTLET TABLE 5 HORIZONTAL OUTDOOR AIR OPENING DIMENSIONS B...

Page 17: ...etration is 2 or 3 as specified in Table 7 Table 7 lists the maximum allowable exhaust vent pipe length for the number of elbows used based on the furnace size IMPORTANT Use Only standard vertical terminations when installing the modulating furnace as a non direct vent appliance 7 The minimum vent length is 5 feet 8 All piping through the roof is 2 When using 3 pipe on 90 105 and 120 kBtu furnaces...

Page 18: ...ning the vent 3 Vertical piping is preferred 4 Install all horizontal piping as fol lows Slope horizontal vent piping upward a minimum of 1 4 per foot of run so that condensate drains toward the furnace Support horizontal vent piping at least every four feet No sags or dips are permitted In Canada refer to manufacturer s instructions for supporting ULC S636 venting WARNING TABLE 8 DIRECT VENT APPL...

Page 19: ...tape The heat tape must be U L listed and installed per the manufacturer s instruc tions 6 All piping between the furnace and the roof or outside wall pene tration is 2 or 3 as specified in Table 8 Table 8 lists the maxi mum allowable length for the exhaust vent pipe and intake air pipe for the number of elbows used based on the type of termi nation and furnace size 7 The minimum vent length is 5 ...

Page 20: ...NT TR RI IC C V VE EN NT T K KI IT T N NO O R RX XG GY Y E E0 03 3A A S SE EE E F FI IG GU UR RE E 1 10 0 This kit is for vertical and horizontal intake air vent runs One 5 in diameter hole is required for installation See Figure 10 for the gen eral layout Complete installation instructions are included with the kit MAINTAIN 12 IN MINIMUM CLEARANCE ABOVE HIGHEST ANTICIPATED SNOW LEVEL MAXIMUM OF 2...

Page 21: ...de Wall Vent 21 ST A1075 FIGURE 12 TYPICAL INSTALLATION For all models installed with 3 pipe reduce to a length between 12 inches and 30 inches of 2 inch pipe Note Vent should protrude a maximum of 2 1 4 beyond vent plate Air intake should protrude a maximum of 1 inch beyond vent plate Seal all wall cavities ...

Page 22: ... To insure proper fur nace operation install the vane in the vertical position as shown in Figure 13 Detail B Failure to install the vane properly can result in nui sance tripping of the pressure switch Exhaust Vent Piping 60 000 and 75 000 BTUH models Use 2 pipe only for the entire length of the vent 90 000 through 120 000 BTUH models Install a 2 coupling at the outside wall to prevent the termin...

Page 23: ...combustion air pipe at the outside wall to prevent the termination from being pushed inward 2 Cut an adequate length of 2 PVC pipe as needed to clear the antici pated snow level and connect this to the elbow 3 Connect another 2 elbow to the end of the pipe such that the inlet is facing away from the wall This outer coupling must terminate 4 inches from the wall 4 Attach the vane in the final 2 elb...

Page 24: ...tiventing two or more furnaces which is covered in the section on multiventing in these instructions In addition to the minimum clearances listed above the vent location should be governed by the following guide lines 1 Do not terminate under any kind of patio or deck exceptions for Canada are permitted under CAN CSA B149 1 If running the vent under a deck insulate it to insure no condensate freez...

Page 25: ...adian Installations US Installations Canadian Installations US Installations 1 ft 30 5 cm 4 ft 1 22 m 3 ft 91 cm 1 ft 30 5 cm 3 ft 91 cm 12 inches 30 cm for appliances 10 000 BTUH 3 kW and 100 000 BTUH 30 kW 36 inches 91 cm for appliances 100 000 BTUH 30 kW For clearances not specified in ANSI Z223 1 NFPA 54 or CAN CSA B149 one of the following shall be indicated 25 ...

Page 26: ...MA AX XI IM MU UM M nection opening has a plastic cap A combustion inlet air connection fitting is supplied with the furnace and it must be installed in the furnace by screwing it into the opening Make sure the rubber O ring supplied with the furnace is used with this fitting See Figure 19 IMPORTANT When using indoor combustion air the furnace air open ing must be protected from accidental blockag...

Page 27: ...FIGURE 19 UPFLOW COMBUSTION AIR AND VENT PIPE CONNECTION GAS VALVE MAY BE DIFFERENT THAN SHOWN FIGURE 20 UPFLOW MODELS COMBUSTION AIR FITTING 27 ST A1157 01 ...

Page 28: ...f routing to a floor drain see Figure 21 If avail able install a condensate pump that is resistant to acidic water Pumps are avail able from your local distributor If pump used is not resistant to acidic water a condensate neutralizer must be used ahead of the pump The condensate pump must have an auxiliary safety switch to prevent operation of the furnace and resulting overflow of condensate in t...

Page 29: ...RSING THE TRAP UPFLOW MODELS The trap may be moved to the right side for right side drainage Open the knockout for the drain on the right side of the cabinet Remove the bracket holding the trap from the left side Seal the left side drain hole with a plug provided in the cloth bag with the furnace Position the mounting bracket and trap so that the drain elbow is centered in the hole on the right Se...

Page 30: ...d their installation should be in accordance with the manufacturer s recommenda tions and or local laws rules regula tions or customs GAS PIPING Install the gas piping according to all local codes and regulations of the utili ty company If possible run a separate gas supply line directly from the meter to the fur nace Consult the local gas company for the location of the manual main shut off valve...

Page 31: ...ce cabinet The gas stop should be readily accessible to turn the gas supply on or off Install a drip leg in the gas supply line as close to the furnace as possible Always use a pipe com pound resistant to the action of liquefied petroleum gases on all threaded con nections IMPORTANT When making gas pipe connections use a back up wrench to prevent any twisting of the control assembly and gas valve ...

Page 32: ... of BTU per hour of undiluted liquefied petroleum gases at 11 inches water column inlet pressure Based on a Pressure Drop of 0 5 Inch Water Column Nominal Length of Pipe Feet Iron Pipe Size Inches 10 20 30 40 50 60 70 80 90 100 125 150 1 2 275 189 152 129 114 103 96 89 83 78 69 63 3 4 567 393 315 267 237 217 196 182 173 162 146 132 1 1 071 732 590 504 448 409 378 346 322 307 275 252 1 1 4 2 205 1 ...

Page 33: ...CSA rating plate Also for servo con trolled gas valves only fuel code HA or HB be sure to install the label titled LP over the hole where the jumper is inserted in Item 4 above 7 Check unit for leaks 8 Follow lighting instructions to put the furnace into operation 9 Check manifold pressure Consult Tables 13 U S and 14 Canada if there is any question con cerning orifice sizing NOTE LP orifices are ...

Page 34: ...TRUCTIONS SERVO GAS VALVE FUEL CODE HA OR HB MANIFOLD GAS PRESSURE MEASUREMENT ADJUSTMENT 1 With the gas to the unit shut off at the manual gas valve remove the outlet pressure tap plug in the gas valve See Figure 28 2 Connect the positive pressure hose from a manometer to the pressure tap 3 Note the manifold gas pressure to be A 3 5 w c 3 for natural gas B 10 0 w c 5 for LP gas NOTE Make sure the...

Page 35: ...CODE ANSI NFPA70 OR IN CANADA THE CANADIAN ELECTRICAL CODE CSA C22 1 OR LOCAL CODES THAT APPLY A GROUND SCREW IS PROVIDED IN THE JUNCTION BOX FAILURE TO PROPERLY CONNECT THE GROUND WIRE CAN CAUSE ELECTRICAL SHOCK RESULTING IN PERSON AL INJURY OR DEATH THIS FURNACE IS EQUIPPED WITH A BLOWER DOOR SAFETY SWITCH DO NOT DISABLE THIS SWITCH FAILURE TO FOLLOW THIS WARNING CAN RESULT IN ELECTRICAL SHOCK P...

Page 36: ...off manually hold the push button door switch in 2 Use a voltmeter to measure the voltage from any 120 VAC terminal to any bare metal ground on the furnace 3 The voltage should be a nominal 115 volts acceptable 105 120VAC 4 Use a voltmeter to measure the voltage from any neutral terminal to the bare metal ground on the fur nace 5 The voltage should be less than 1 0 VAC 6 If the voltage from any 12...

Page 37: ...rage requirements of commercially available electronic air cleaners Continuous fan speeds are selectable and some lower fan speeds may not deliver enough airflow to operate an electronic air cleaner The IFC deter mines the minimum airflow necessary to operate an electronic air cleaner and will not turn on the electronic air cleaner unless the airflow is high enough for the EAC The electronic air c...

Page 38: ...humid ifier with external and internal power sup plies respectively Dehumidification oper ation will be disabled if the dipswitch S5 1 is in the OFF position If this switch is in the ON position dehu midification control will be active B DEHUMIDIFICATION CONTROL WITH NO HUMIDIFICATION B1 For communicating ther mostats listed with this fur nace dehumidification is controlled automatically when sele...

Page 39: ...ermostats However it is not included with the HC TST501CMMS model commu nicating thermostat Do not pur chase the latter thermostat if humidification control is required To wire the furnace for humidification and dehumidifi cation control using the former thermostats refer to the wiring diagram in Figure 31 Be sure not to install the jumper between R and HUM STAT on the furnace control Installing t...

Page 40: ...essage appears the outdoor unit will shut down and the indoor unit will continue to run at first stage cooling airflow A BLOWER RUNS Y1 NORMALLY CLOSED If the device does not have normally open contacts an additional relay must be used for proper system operation NORMALLY OPEN When the device is connected to Y2 and a fault occurs the blower will shut down The Y2 input can still be used with normal...

Page 41: ...to change orifices except at extreme alti tudes Table 11 shows some quick con versions based on elevation and gas heating value This table is combined and simplified from Tables F1 and F4 of the National Fuel Gas Code EXAMPLES The following are examples of orifice sizing using the National Fuel Gas Code Appendix F For a simplified esti mation of orifice size based on heating value and elevation us...

Page 42: ... 800 13 200 12 600 12 000 11 400 10 800 10 200 9 600 All calculations are performed by using the first three columns of information only Before beginning any calculations determine the individual burner Btu size and heating value at Sea Level for the installation site Each value shown in the Heat Value column is per burner at 3 5 W C NOTE Heat Value at Sea Level for the location of the installatio...

Page 43: ... that an actual 10 reduction in input rate is achieved TABLE 13 LP Gas Orifice Drill Size and per burner de rate by elevation based on 15 000 btu 90 burners IMPORTANT For 90 Furnaces only Do not use this chart for any 80 Furnace Input per Orifice Altitude burner 15000 Size 0 to 2000 ft 15000 1 15 mm factory 2001ⴕ to 3000ⴕ 13200 1 15 mm 3001ⴕ to 4000ⴕ 12600 1 10 mm 4001ⴕ to 5000ⴕ 12000 58 5001ⴕ to ...

Page 44: ...s and Tables 15 and 16 of this document Using Tables 15 and 16 and literature provided with the cooling equipment the installer needs to make sure that the proper evaporator coil condensing coil and airflow is config ured to achieve rated efficiency In accordance with Rheem Ruud cool ing equipment installation instructions do not install an evaporator coil or coil casing to the furnace which is sm...

Page 45: ... For example if C is displayed fol lowed by 12 toggling this would indicate that the system is in air con ditioning mode with the airflow oper ating at 1200 CFM HEAT PUMP HEAT MODE COMMUNICATING DUAL FUEL SYSTEMS HP is displayed This is then tog gled with two numbers which indi cate the CFM of the main circulating blower divided by 100 For example if 18 is displayed the furnace is attempting to de...

Page 46: ... THIS EXAMPLE IS 33 NOT EE FIGURE 38 WIRING DIAGRAM SPECIAL CONFIGURATION COMMUNICATING THERMOSTAT AND FURNACE WITH NON COMMUNICATING CONDENSER NOTE DEHUMIDIFICATION FUNCTION FROM A COMMUNICAT ING THERMOSTAT WILL NOT BE POSSIBLE WITH THIS CONFIGURATION ST A1183 01 NOTE THIS CONFIGURATION IS VALID FOR A C CONDENSERS ONLY HEAT PUMP CONDENSERS CAN NOT BE INSTALLED IN THIS CONFIGURATION BECAUSE THERE ...

Page 47: ...furnace control to turn on the blower when they are energized However in this configuration this normally input becomes an output to energize the condenser when a cooling call has been sent from the communicating thermostat When this configuration is desired use the wiring diagram in Figure 38 to con nect the thermostat and condenser to the furnace control NOTE A heat pump condenser cannot be inst...

Page 48: ...IGH PRES SW SENSE Pin 3 RLI ROLL OUT SWITCH SENSE Pin 4 TH 24V HOT Pin 5 GND GROUND Pin 6 NOT USED Pin 7 PSO PRESSURE SWITCH OUTPUT Pin 8 MVC MAIN VALVE COMMON Pin 9 NOT USED Pin 10 AUX SENSE Pin 11 TR 24V COMMON Pin 12 PS2 SECOND PRESSURE SWITCH OUTPUT Pin 13 NOT USED Pin 14 NOT USED Pin 15 AXI AUXILIARY SWITCH INPUT COMMUNICATING ECM MOTOR COMMUNICATIONS CONTROL CONNECTION E114 This connector se...

Page 49: ...he section of this docu ment titled SPECIAL CONFIGURATION COMMUNICATING THERMOSTAT AND FURNACE WITH A NON COM MUNICATING CONDENSER The terminal labeled 1 on the furnace control connects directly to the terminal labeled 1 on the thermostat and 1 on the condenser The remaining connec tions follow the same pattern Follow the wiring diagram in Figure 45 for connections of the communications network CO...

Page 50: ... shared data The furnace will not operate properly without the correct furnace shared data When no furnace shared data is present either at the memory card or on the net work a d4 is displayed for 5 minutes followed by d1 NO SHARED DATA fault code will be displayed at both the ther mostat active fault screen and at the furnace control I F C seven segment displays Also the homeowner will be alerted...

Page 51: ...t for the memo ry card will be displayed at the active fault screen of the com municating thermostat and at the furnace seven segment dis plays when in standby mode only see fault code priority list The homeowner will not be alerted level 1 fault b If neither the furnace shared data on the memory card is valid nor the furnace shared data on the network is valid the fault code sta tus is elevated T...

Page 52: ...e energized S3 S3 1 AND S3 2 COOLING AIRFLOW SELECT NON COMMUNICATING SYSTEMS These dipswitches are used to select the appropriate cooling airflow based on the amount required The switch settings do not affect cooling airflow when installed with a fully com municating condenser In that case the condenser supplies the information for cooling airflow which is preset at the factory and not adjustable...

Page 53: ...call for heating When the furnace is powered with the test switches in a position other than modulating single stage or in 2 stage mode the first call for heat within the first hour after power up will instruct the furnace to perform as follows MODULATING FURNACE COOLING AIRFLOW RATES 1 2 HP 1200 CFM Max motor settings applies only to systems configured with non communicating condenser S5 2 S3 Pos...

Page 54: ...odulating single stage mode or 2 stage mode 5 Replace furnace blower door 6 Switch the 115 volt power to the furnace ON 7 Set the thermostat as desired 1 Normal ignition sequence 2 Blower On Delay 3 The furnace will then adjust to the desired Test capacity This allows time for the technician to check steady state operation and evaluate furnace performance The furnace will operate at the fixed Test...

Page 55: ...ing thermostat functions and operations are explained in detail in the sections of this manual titled COMMUNICATING SYSTEMS and THERMOSTATS under the sub section titled COMMUNICATING THER MOSTATS Based on the dipswitch settings of S4 2 and S4 3 the furnace will operate with either single stage or two stage ther mostats as a modulating system using an algorithm that utilizes three distinct firing r...

Page 56: ...ced to the dehumidification speed S5 2 For most cooling operation leave dip switch S5 2 in the OFF position This will enable the furnace operation with most two stage non communicat ing cooling equipment Actual SEER values will vary and depend on the equipment combination Consult the specifications sheets and installation instructions of the cooling equipment purchased for a listing of the SEER ra...

Page 57: ...he furnace User Menus The most recent six fault codes are stored Also dis played is the number of days since each fault code was recorded NOTE The following fault codes will not be stored back to back in the fault buffer These will only be stored in the buffer if the previous fault stored was a different fault 82 11 45 46 57 S2 BIAS TERMINATION These dipswitches will not be used for first generati...

Page 58: ...SHARED DATA None d8 d8 OLD SHARED DATA Call For Service CHECK FURNACE d8 h GAS HT ON NO V None h steady 10 IGN 1 HR RTRY Call For Service CHECK FURNACE 10 11 FAILED IGNITION None 11 12 LO FLAME SENSE None 12 13 FLAME LOST None 13 14 UNEXPCTED FLAME Call For Service CHECK FURNACE 14 22 MAIN LIMIT OPEN None 22 23 HALC LIMIT OPEN Call For Service CHECK FURNACE 23 26 LINE_NTRL RVRSD Call For Service C...

Page 59: ...The thermo stat will display the following text SEARCHING is displayed several times for sever al seconds Next the text FURNACE FOUND and AIR CONDITIONER FOUND or HEAT PUMP FOUND depending on which is installed in the system will be displayed The process can take several minutes up to a maximum of 30 to com plete If these messages are not displayed within 30 minutes after energizing the system com...

Page 60: ...ll be dis played This may be an indicator of excessive static pressure or inadequate duct sizing The message will not be displayed again after the first three min utes of blower operation CONTINUOUS FAN OPERATION IN COMMUNICATING MODE NOTE It is important for the installer to run the communicating system at the maximum cooling rate with communi cating condenser attached so that the furnace can det...

Page 61: ... be an indicator of excessive static pressure in the ven tilation duct The main limit control is not moni tored except in heating During all other modes STANDBY is dis played 2 M MR RL LC C I IN NP PU UT T Indicates the state of the Manual Reset Limit Control MRLC either opened or closed 3 H HA AL LC C I IN NP PU UT T Indicates the state of the Heat Assisted Limit Control HALC either opened or clo...

Page 62: ...nd should be close but will not be per fectly accurate When the inducer is off the text OFF will be displayed 5 F FU UR RN N L LO O P PR R S SW W Indicates the state of the Low Pressure Control LPC also known as low pressure switch either OPEN or CLOSED 6 F FU UR RN N H HI I P PR R S SW W Indicates the state of the High Pressure Control HPC also known as high pres sure switch either OPEN or CLOSED...

Page 63: ...number of hours of continuous fan operation over the life of the fur nace 5 BLOWER CYCLS Indicates the number of cycles of operation i e the number of times it turned on and off of the continuous fan oper ation over the life of the furnace FAULT HISTORY menu This menu gives information about the six most recent faults experienced by the fur nace The most recent fault is dis played upon entering th...

Page 64: ...h heat airflow Operation of this selection is exactly as with the dip switches at SW3 at the furnace con trol The high heat rise can be changed by increasing or decreas ing the airflow slightly Adjustments are 15 7 5 0 7 5 and 15 Note that when a high heat adjustment is made the high heat rate is adjusted and all points between high and low heat will be adjusted proportionally with the greatest ad...

Page 65: ...ostat for optimal operation The balance point is the point below which gas heat will be used and above which heat pump heat will be used 100 PRCNT TEST S4 2 OFF and S4 3 ON Represents the mode of operation which will provide 100 heat rate for any heat call regardless of the rate transmitted by the thermostat This mode ends automatically after the first 60 min utes of operation after power up 9 AC ...

Page 66: ...r to close the negative pressure switch The induced draft blower must maintain at least the negative pressure switch set point for the furnace to oper ate If the induced draft blower fails to close or maintain the closing of the nega tive pressure switch a no heat call would result 1 Remove the burner compartment control access door 2 IMPORTANT Be sure that the man ual gas control has been in the ...

Page 67: ...FC C DESCRIPTION Indicates low cooling for legacy systems only This code is not used in communicating systems C DESCRIPTION This code indicates the furnace is in cooling mode any stage for communicating systems high stage only for legacy systems Some models will continue to display C during O D D White Rodgers control on RGFG furnace models ...

Page 68: ...YSTEMS ONLY SW2 2 and SW2 3 must both be turned off for this operation W signal only After the warm up period the furnace will respond to the thermostat demand by altering the gas valve pressure and blower speed as follows Phase 1 0 to 5 minutes 40 of furnace capacity gas valve output and blower speed Phase 2 5 to 12 minutes 65 of fur nace capacity gas valve output and blower speed Phase 3 After 1...

Page 69: ...r application and maintenance are critical to airflow which may affect the heating and cooling system performance Reduced airflow can shorten the life of the system s major components such as motor limits heat exchanger evaporator coil or compressor Consequently it is rec ommended that the return air duct system have only one filter location The most common location will be inside the furnace or a...

Page 70: ...70 FIGURE 49 UPFLOW SIDE FILTER LOCATIONS CUT OUT AND DRILL DETAIL ROD FILTER SUPPORT ANGLE ASSEMBLY I332 ...

Page 71: ...eating due to an accumulation of dust and dirt on the windings or on the motor exterior The air filters should be kept clean As dirty filters can restrict airflow The motor depends upon sufficient airflowing across and through it to keep from over heating SYSTEM OPERATION INFORMATION Advise The Customer IMPORTANT Replace all blower doors and compartment covers after servicing the furnace Do not op...

Page 72: ...72 FIGURE 50 TROUBLESHOOTING CHART MODULATING INTEGRATED FURNACE CONTROL IFC TROUBLESHOOTING GUIDE ...

Page 73: ...73 FIGURE 50 CONTINUED TROUBLESHOOTING CHART CONTINUED ...

Page 74: ...cates low cooling for legacy systems only This code is not used in communicating systems C DESCRIPTION This code indicates the furnace is in cooling mode any stage for communicating systems high stage only for legacy systems This is displayed on power up All segments of both display digits light up briefly 88 ...

Page 75: ...t active fault screen For example the text C CA AR RD D H HA AR RD Dw wa ar re e C Co oN NF FL Li iC CT T indicates that the message displayed at the thermostat active fault screen will be C CA AR RD D H HA AR RD D C CN NF FL LC CT T NOTE The following fault codes will not be stored back to back in the fault buffer These will only be stored in the buffer if the previous fault stored was a differen...

Page 76: ...76 TABLE 24 CONTINUED FURNACE FAULT CODES EXPANDED W DESCRIPTIONS AND SOLUTIONS CONTINUED E 117 TABLE CONTINUES ON FOLLOWING PAGES ...

Page 77: ...77 TABLE 24 CONTINUED FURNACE FAULT CODES EXPANDED W DESCRIPTIONS AND SOLUTIONS CONTINUED TABLE CONTINUES ON FOLLOWING PAGES ...

Page 78: ...78 TABLE 24 CONTINUED FURNACE FAULT CODES EXPANDED W DESCRIPTIONS AND SOLUTIONS CONTINUED TABLE CONTINUES ON FOLLOWING PAGES ...

Page 79: ...empts The most common are 1 The flame sense rod is unable to sense flame It may need cleaning or may not be properly connected 2 The igniter is not working properly It may not be properly connected or broken 3 The furnace control may not be working properly and may need to be replaced 4 The flame maynot be properly spreading from the first burner to the last ...

Page 80: ...D FURNACE FAULT CODES EXPANDED W DESCRIPTIONS AND SOLUTIONS CONTINUED NOTE After 3rd failure while going through 4th ignition attempt homeowner is notified at the communicating thermostat TABLE CONTINUES ON FOLLOWING PAGES ...

Page 81: ...81 TABLE 24 CONTINUED FURNACE FAULT CODES EXPANDED W DESCRIPTIONS AND SOLUTIONS CONTINUED TABLE CONTINUES ON FOLLOWING PAGES ...

Page 82: ...T AREA OF COMM THERMOSTAT IGN FAIL CODE AT DUAL 7 SEGMENT DISPLAY OF IFC FAULT AREA OF COMM THERMOSTAT 16 CAUSE The control cannot sense the igniter The igniter may be out of spec the control may be faulty or there may be a large potential differnce between ground and neutral to the furnace control STATUS This is a critical fault The furnace will not operate in any mode 16 MESSAGES TO HOMEOWNER AT...

Page 83: ...83 TABLE 24 CONTINUED FURNACE FAULT CODES EXPANDED W DESCRIPTIONS AND SOLUTIONS CONTINUED pins 10 15 of connector E 18 pins 10 15 E 18 TABLE CONTINUES ON FOLLOWING PAGES ...

Page 84: ...84 TABLE 24 CONTINUED FURNACE FAULT CODES EXPANDED W DESCRIPTIONS AND SOLUTIONS CONTINUED TABLE CONTINUES ON FOLLOWING PAGES ...

Page 85: ...85 TABLE 24 CONTINUED FURNACE FAULT CODES EXPANDED W DESCRIPTIONS AND SOLUTIONS CONTINUED when the inducer is energized at high speed 60 The switch is ...

Page 86: ...86 TABLE 24 CONTINUED FURNACE FAULT CODES EXPANDED W DESCRIPTIONS AND SOLUTIONS CONTINUED when the inducer is energized at low TABLE CONTINUES ON FOLLOWING PAGES ...

Page 87: ...87 TABLE 24 CONTINUED FURNACE FAULT CODES EXPANDED W DESCRIPTIONS AND SOLUTIONS CONTINUED TABLE CONTINUES ON FOLLOWING PAGES ...

Page 88: ...88 TABLE 24 CONTINUED FURNACE FAULT CODES EXPANDED W DESCRIPTIONS AND SOLUTIONS CONTINUED TABLE CONTINUES ON FOLLOWING PAGES ...

Page 89: ...89 TABLE 24 CONTINUED FURNACE FAULT CODES EXPANDED W DESCRIPTIONS AND SOLUTIONS CONTINUED Indoor Blower Motor I B M will complete the 90 second blower off delay Further heating operation ...

Page 90: ...90 TABLE 24 CONTINUED FURNACE FAULT CODES EXPANDED W DESCRIPTIONS AND SOLUTIONS CONTINUED ...

Page 91: ...91 FIGURE 51 WIRING DIAGRAM STEPPER MODULATING GAS VALVE FUEL CODE HU FURNACE MODEL IS RGFG ...

Page 92: ...G THERMOSTAT As described previously in this manual operation with a non communicating modulating or communicating thermo stat when installed as shown in Figures 54 and 55 are fully modulating between 40 and 100 of furnace capacity The firing rate is first deter mined by the thermostat and then sent to the furnace This is the optimum mode of operation and will give the best temperature control wit...

Page 93: ... 1 SEE THERMOSTAT INSTALLATION INSTRUCTIONS THERMOSTAT MODEL HC TST401MDMS REMOTE SENSOR F1451378 S 12 FT OUTDOOR SENSOR 1 NON COMMUNICATING MODULATING THERMOSTAT 2 STAGE COOLING ONLY WARNING DO NOT APPLY 24VAC TO THE V W2 TERMINAL ON THE IFC THIS IS OFTEN DONE DURING SETUP TROUBLESHOOTING AND OR DIAGNOSING PROBLEMS DOING SO WILL DAMAGE THE THERMOSTAT WARNING DO NOT APPLY 24VAC TO THE V W2 TERMINA...

Page 94: ...N 40 FIRING RATE IN TWO STAGE OPERATION DIP SWITCH SET SW2 SWITCHES 1 2 OFF 2 STG COOLING ONLY YL Y1 YL Y1 Y Y2 YH Y2 Y Y2 1 STAGE ELECTRONIC THERMOSTAT NON COMMUNICATING FIGURE 55 FULLY MODULATING TYPICAL DUAL FUEL APPLICATION TWO STAGE HEAT PUMP NON COMMUNICATING THERMOSTAT MODEL HC TST412MDMS REMOTE SENSOR F1451378 PLENUM SENSOR 47 21711 20 NO MECHANICAL THERMOSTATS 40 65 and 100 FIRING RATE IN...

Page 95: ...FURNACE WITH NON COMMUNICATING CONDENSER ST A1173 01 NOTE DEHUMIDIFICATION FUNCTION FROM A COMMUNICAT ING THERMOSTAT WILL NOT BE POSSIBLE WITH THIS CONFIGURATION NO MECHANICAL THERMOSTATS 40 FIRING RATE IN TWO STAGE OPERATION DIP SWITCH SET S4 SWITCHES 2 3 ON 65 AND 100 FIRING RATE IN TWO STAGE OPERATION W W2 ENERGIZED TWO STAGE COOLING ONLY ...

Page 96: ...ews Leveling is for appearance only and will not affect thermostat oper ation 5 Connect wires to terminal block on base using appropriate wiring schematic see Figures 53 through 55 6 Push excess wire into wall and plug hole with a fire resistant material such as fiberglass insula tion to prevent drafts from affect ing thermostat operation 7 Carefully line the thermostat up with the base and snap i...

Page 97: ...rmostat is in a temporary HOLD mode 10 Hours and Days displays during steps in installer configuration 9 Hold Until indicates the time when a temporary hold period will end 8 Used in programming to set time and in configuration menu to change selections 7 CLEAN DISPLAY button allows 30 seconds to wipe off the display or ADVANCE DAY button for programming 6 COPY button or INSTALLER CONFIG button 5 ...

Page 98: ...5 AS Heat OFF On Selects Automatic Schedule for comfort temperature Programming heat mode 18 16 AS Cool OFF On Selects Automatic Schedule for comfort temperature Programming cool mode 19 17 CS OFF 1 2 3 4 5 6 Selects Cool Saving Feature amount Cool Savings 20 18 HL Heat 99 62 98 TEMPERATURE LIMIT HEAT max heat set point 21 19 LL Cool 45 46 82 TEMPERATURE LIMIT COOL min cool set point 22 20 OFF L t...

Page 99: ...ntinuously running during the periods of high demand Periods of high demand will normally occur during the late afternoon and early evening on the hottest days of the summer As demand lessens the adjustments to sensed temperature are reversed until sensed temperature returns to normal and CoolSavings no longer flashes 1 This control can be configured for MS2 Multi Sta ge System 2 heat 2 cool HP1 H...

Page 100: ...nergize immediately With FA OFF second stage will not energize until the setpoint tempera ture is 1 F or more above actual temperature for more than ten minutes The Fast Cool feature FA Cool provides the same controls when the setpoint tempera ture is lowered INSTALLER CONFIGURATION MENU 25 Select Remote Temperature Sensor This control allows one wired remote temperature sensor indoor or outdoor b...

Page 101: ...emperature or press Run Schedule to cancel HOLD and resume the programmed schedule Program Override Temporary Override Press or buttons to adjust the temperature This will override the temperature setting for a default four hour override period The override period can be shortened by pressing or lengthened by pressing Program Override period can range from 15 minutes to 7 days Example If you turn ...

Page 102: ...he run mode for as long as the fan is in that position When FAN Prog position is selected and the system is in the Cool Heat or Auto mode the circulator blower fan will cycle ON for 10 minutes OFF for 20 minutes when the thermostat has not called for cooling or heating for the past 60 minutes To improve indoor air quality the system circulator can be programmed to run during any program time perio...

Page 103: ...day If you are re programming a 5 1 1 day schedule pencil in your own times and temperatures directly below the factory times and temperatures If you are re programming a 7 day fill in all lines with the times and temperatures you want Keep the following guidelines in mind when planning your program In Heating lower temperatures will save energy In Cooling higher temperatures will save energy If y...

Page 104: ...oggle the function and display from LS shown in actual temperature digits and On shown in clock digits to LS OFF to designate the local sensor is disabled The local sensor may be disabled only if the indoor remote sensor is enabled and functional If the indoor remote sensor is disabled or not functional the local sensor will automatically enable and display in the run schedule mode The actual temp...

Page 105: ...lace door panel in proper position to engage safety interlock or door switch Tighten connections Re light pilot Many furnaces have safety devices that shut down when a lock out condition occurs If the heat works intermittently contact the furnace manufacturer or local HVAC service person for assistance Diagnostic Set SYSTEM Switch to HEAT and raise the setpoint above room temperature Within a few ...

Page 106: ...a small amount of insulation from the wire to expose clean new copper for the communicating con nections Fresh copper must be exposed when making the communi cating connections or communications may not be properly established Figures 63 and 64 are wiring diagrams for connecting the furnace to an approved ClimateTalk communicating thermostat and approved Rheem or Ruud communicating condenser The o...

Page 107: ...cessary the additional relays have been added to the furnace control to allow this operation Two stage cooling with a communicat ing thermostat and non communicating condenser is not possible as only Y1 has output capability to energize a con tactor The thermostat connections labeled Y1 on the I F C is normally an input to the furnace control to turn on the blower when energized However in this co...

Page 108: ...unicating thermostat see the installation and operation instructions for that thermo stat For detailed user menu text navigation and descriptions refer to the section of this manual titled COMMUNICATING SYSTEMS under the subsection titled USER MENUS Below describes some basic methods for entering and viewing furnace fault messages and user menus for two dif ferent communicating thermostats avail a...

Page 109: ... menu and subsequent sub menus with the HC TST501CMMS communicating thermo stat To get into the submenus use the up and down arrow keys of the thermo stat to display the desired menu and press the Installer Config button on the thermostat to enter that menu FIGURE 66 WIRING DIAGRAM COMMUNICATING CONFIGURATION ST A1118 01 4 ...

Page 110: ...R OF THE THERMOSTAT PRESS THE LEFT OR RIGHT ARROW KEY A UNTIL THE TEXT 15 IS DISPLAYED IN THE CORNER PRESS THE UP OR DOWN ARROW KEY OR THE MENU KEY TO SET THE VALUE IF THE MENU KEY IS PRESSED THE PREVIOUS MENU SCREEN WILL BE SHOWN BUT THE NEW VALUE 15 WILL BE SET AFTER ENTERING THE SETUP MENU OF THE FURNACE SEE STEP 7 IN FIGURE 66 THERE WILL BE SEVERAL VALUES THAT CAN BE CHANGED BY THE INSTALLER B...

Page 111: ...nus Figure 68 demonstrates how to escape from a menu back to the main screen or how to return to a previous menu level using the HC TST501CMMS communicating thermostat FIGURE 68 WIRING DIAGRAM COMMUNICATING CONFIGURATION ST A1118 01 1 ...

Page 112: ...MMABLE COMMUNICATING THER MOSTAT Viewing Furnace Fault Messages with the HC TST550CMMS Thermostat To enter a particular user menu on the HC TST550CMMS full color communicating thermostat follow the directions below FIGURE 69 ENTER THE ADVANCED INSTALLER MENUWIRING DIAGRAM COMMUNICATING CONFIGURATION FIGURE 70 SELECT FAULT STATUSIRING DIAGRAM COMMUNICATING CONFIGURATION 1 From the main screen press...

Page 113: ... next screen below will appear 4 The furnace menu options will appear Use the up and down arrow keys to select the desired menu Next press M to enter the desired menu Next the next screen below will appear FIGURE 76 NAVIGATE THE USER MENUS USING UP AND DOWN ARROW KEYS 5 Use the up and down arrow keys to view the menu items 6 To escape from this menu press the Enter to return to the fur nace user m...

Page 114: ...up user menus FIGURE 77 ENTER THE ADVANCED INSTALLER MENU 1 From the main screen press the left and right arrow keys together at the same time for at least 3 seconds The next screen below will appear 2 The ADVANCED INSTALLER MENU is displayed Use the up and down arrow keys to high light Communicating Devices Next press the M key The next screen below will appear 3 From the devices listed use the u...

Page 115: ...MAX HEAT Adj cur rently set to 0 FIGURE 82 SELECT THE DESIRED VALUE 7 6 Use the up and down arrow keys to view and navigate to the desired setup selection Once the desired menu item is highlighted press the M key to change the selec tion In this exam ple we will change the MAX HEAT Adj currently set to 0 to 7 FIGURE 83 UPDATING THE SUBSYSTEM 7 This screen Updating the Subsystem will be displayed b...

Page 116: ...pdate Successful will be displayed briefly upon successfully changing the setting 9 To escape from this menu press the Enter to return to the furnace user menus or Home button or just wait a few minutes and the main screen will appear again CM 0211 ...

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