Bryant Furnace NAHA003WK.01 User's Manual
Contents
1. 23 ELECTRONIC FAN CONTROL FURNACE 2 ISOLATION RELAY CONDENSER 25 23 82 441 06 1003 02 10 2001 Thermostat Wiring For Single Stage Heating And Two Stage Cooling ELECTRONIC FAN CONTROL FURNACE 2 ELECTRONIC FAN CONTROL FURNACE 1 M1 M2 HUM HEAT EAC Mi M2 HUM HEAT EAC WALL em Connect H to H THERMOSTAT E Connect C to C CONDENSERS ISOLATION RELAY Thermostat Wiring For Two Stage Heating And Single Stage Cooling ELECTRONIC FAN CONTROL FURNACE 2 ELECTRONIC FAN CONTROL FURNACE 12. V Twinning Leads Z1TO Z1 o gin ied o ga i e o o FURNACE 2 FURNACE 71 Splice if Required to obtain necessary length Bushings ST9160 ST9160 V Twinning Leads 25 23 79 Figures Proper Connection of Twinning Leads for ST 9120 WALL THERMOSTAT I THERMOSTAT WIRING FOR SINGLE STAGE HEATING 22 22 21 21 22 921 22 921 ELECTRONIC ELECTRONIC FAN FAN CONTROL CONTROL FURNACE FURNACE 1 2 ISOLATION RELAY THERMOSTAT WIRING FOR TWO STAGE HEATING WALL THERMOSTAT 22 22 21 21 22 921 22 9271 ELECTRONIC ELECTRONIC FAN CONTROL CONTROL FURNACE FURNACE 1 2
3. ISOLATION RELAY 10 12 21a 441 06 1003 02 10 2001 Figures Proper Connection of Twinning Leads for ST 9160 Thermostat Wiring For Single Stage Heating O O ELECTRONIC ELECTRONIC FAN CONTROL FAN CONTROL FURNACE 1 FURNACE 2 M2 A EAC Mi M2 HUM HEAT EAC Mi WALL Pa Connect H to H THERMOSTAT Connect C to C GWR ISOLATION RELAY Thermostat Wiring For Two Stage Heating ELECTRONIC ELECTRONIC FAN CONTROL FAN CONTROL FURNACE 1 FURNACE 2 HUM HEAT EAC M1 M2 HUM HEAT EAC Mi M2 WALL ET Connect H to H THERMOSTAT Connect C to C ISOLAT
4. Mi M2 HUM HEAT M1 M2 HUM HEAT EAC WALL gt Connect H to H THERMOSTAT Ns Connect C to C G Y W2W1R OO 9000 AIC CONDENSER ISOLATION RELAY fer _ Thermostat Wiring For Single Stage Heating And Cooling ELECTRONIC FAN CONTROL FURNACE 1 Qu C p ST9120C 40 WALL TE Connect Z1 To Z1 THERMOSTAT Connect Z2 To Z2 R ELECTRONIC FAN CONTROL FURNACE 2 ISOLATION RELAY CONDENSER Thermostat Wiring For Two Stage Heating amp Cooling ELECTRONIC FAN CONTROL FURNACE 1
5. 2 5 8120 40 WALL THERMOSTAT Connect Z1 To Z1 Connect Z2 To Z2 G Y2 Yi W2W1R OQ HOO ELECTRONIC FAN CONTROL FURNACE 42 SPEED CONDENSERS ISOLATION RELAY 25 23 83 Thermostat Wiring For Single Stage Heating And Cooling ELECTRONIC FAN CONTROL FURNACE 1 WALL THERMOSTAT WR OO HUM HEAT EAC 2 Mi ELECTRONIC FAN CONTROL FURNACE 2 Connect H to H Mi M2 HUM HEAT Connect C to C jm ISOLATION RELAY CONDENSERS Thermostat Wiri
6. CONTROLS ST 9210 amp 519160 ELECTRONIC FAN CONTROL ELECTRONIC FAN CONTROL ST9120 ST9120 Twinning Leads Connect Z1 To Z1 And Z2 To Z2 ELECTRONIC FAN CONTROL ELECTRONIC FAN CONTROL 19100 519160 Li Li ST9160B ST9160B M1 M2 HUM HEAT EAC Twining Leads Connect H To H And C To C 25 23 78 441 06 1003 02 10 2001 Proper Connection of Twinning Leads for ST 9120 amp ST 9160 FURNACE 2 FURNACE 1 Splice if Required to obtain necessary length Bushings ST9120 ST9120 Doa IL erm LI TRE mms Be L 22 72 L
7. and 0 15 for the 2nd stage Recheck wiring connections splices and insulation Re apply line power to both appliances Twinning Kit Operation 1 Turn the heat cool switching at the thermostat to OFF or set so neither a call for heating nor cooling is being made Turnthe fan switch to from AUTO or jumper from R to at furnace 1 Within several seconds the circulation blowers of each furnace will start at the same speed connected to their respective heat speed taps Turn the fan switch to OFF from AUTO or remove the jumper from to Both circulation blowers will stop after several seconds Disconnect one wire from the high limit connection on furnace 1 Within several seconds the circulation blowers of each furnace will start at the same speed connected to their respective heat speed taps Re connect the wire removed from the high limit connection on furnace 1 After the completion of the heating blower off delay both blowers will stop Repeat steps 4 and 5 with the limit connection in furnace 2 versus furnace 1 The same operation should result Operate the system through a normal call for heat burner on operation and burner off operation Each furnace should fire and cycle both blowers including blower on and off delays as in a normal single system Operate the system through a normal call for cooling The compr
8. setting Set thermostat anticipator setting at 0 90 Recheck wiring connections splices and insulation Re apply line power to both appliances Stage Thermostat Operation Reference Figure 6 and Figure 7 1 Interconnect the thermostat wiring in parallel from the thermostattothe terminal blocks on each fan control for the and Y connections only Interconnect the wiring from the C connections at the terminal blocks on each fan control Note The Y connection is not required if air conditioning is not available Connect wire from W1 of the thermostat to the W connection of the electronic fan control of furnace 1 Connect wire from W2 of the thermostat to one side of the 24Vac coil of the isolation relay terminal 3 Wire terminals for connection to the isolation relay are provided in the kit Connect wire from R connection at the thermostat to the connection of the electronic fan control of furnace 1 Connect wire from the connection of the electronic fan control offurnace 1 tothe other side ofthe 24Vac coil ofthe isolation relay terminal 1 Connect one wire to each ofthe normally open terminals of the isolation relay terminal 2 and 44 and connect to the R and W connections at the electronic fan control of furnace 2 Set the heat delay off timings on each control to the same setting Set thermostat anticipator setting at 0 75 for the 1st stage
9. INSTALLATION INSTRUCTIONS Twinning Kit NAHAO03WK 01 For Use With Furnace Models Using Honeywell ST9120 and ST 9160 Electronic Fan Controls Please read these instructions completely before attempting installation WARNING Electrical shock hazard Fire and or explosion haz ard Turn off electric power supply at disconnect switch or service panel before starting installation Turn off gas supply at field installed manual gas valve before starting installation Failure to follow this warning can result in property damage personal injury and or death A WARNING Installation or repairs made by unqualified persons can result in hazards to you and others Installation MUST conform with local building codes or in the absence of local codes with the National Fuel Gas Code NFPA 54 ANSI A223 1 1990 or latest edition In Canada National Standard CAN CGA B149 1 The information contained in this manual is in tended for use by a qualified service technician fa miliar with proper safety procedures and equipped with the proper tools and test instruments Failure to carefully read and follow all instructions in this manual can result in furnace malfunction property damage personal injury and or death This twinning kit is intended to permit two identical gas furnaces to be installed connected to the same duct work Air conditioning can be added by using one air conditioning evaporator coil sized for the total air flow c
10. ION RELAY 25 23 80 Thermostat Wiring For Single Stage Heating And Two Stage Cooling ELECTRONIC FAN CONTROL FURNACE 1 WALL THERMOSTAT Y2 Y1 W1 O 2 519120 40 Connect Z1 To Z1 22 22 A ys SECHS NN ELECTRONIC FAN CONTROL gt FURNACE 2 SPEED Bm YO CO AIC CONDENSERS Y O4 ISOLATION RELAY Thermostat Wiring For Two Stage Heating And Single Stage Cooling ELECTRONIC FAN CONTROL FURNACE 1 WALL THERMOSTAT Oe 21 21 Dp 79120 40 Connect Z2 To Z2
11. apabilities of the two furnaces Single and Two Stage Heating Single or two stage heating is obtainable using twinning kit Follow the instructions located in the Twinning Kit Installation section for proper hookup of desired thermostat staging Printed in U S A Furnace Installation Refer to the Installation Instructions packed with the furnaces for information about clearances start up and maintenance gas piping and vent installation CAUTION Furnaces installed MUST be identical They may be installed on a raised platform or wood floor which MUST be level When side return is required separate return air drops MUST be made to both furnaces Do not use rear of furnace for the return air duct connection CAUTION Make sure blower motors are wired to operate on the same speed tap CAUTION Two furnaces must be plumbed with a single supply gas shut off valve NOTE When twinning kit has been installed locate the adhesive backed wiring diagram included in the kit and apply next to the existing wiring diagrams in the furnaces TWINNING KIT INSTALLATION The twinning kit contains 2 36 wires of two different colors to interconnect the electronic fan controls of the two furnaces For proper operation and to avoid damage to the controls be sure to match 21 to Z1 and 22 to Z2 or C to H to Hon each fan control see Figure 1 and Figure 2 The wires are color coded to assist with this
12. connection Each wire is factory terminated with a special crimped edge connector which will push into mating connection positions on the edge of the circuit board on each fan control The length of these wires can be extended by cutting and splicing sufficient additional wire to each lead An isolation relay is provided to protect the system s thermostat from possible overloading due to the combined valve and control load of the two appliances 441 06 1003 02 10 2001 Installation Procedures Remove line power from both appliances before starting installation of the twinning kit Locate the Z1 and Z2 or C to C and H to H connections along one edge of each control see Figure 1 and Figure 2 The designations are printed on top ofthe circuit board and a black bar shows the correct orientation of the metal body which will be pushed in to make connection Remove furnace casing hole plugs and route the twinning leads through bushings provided as required and lengthen if necessary by splicing Be sure to observe the polarity required so as to match Z1 to Z1 and 2210 Z2 or C to C and H to H see Figure 3 Push the terminal into the slot on the circuit board edge Be sureto align the body with the black barto line up the solder finger below the circuit board see Figure 1 The terminal will bite into the solder and make the necessary connection Repeat for each end of both wires Locate and mount the isolation relay in the circulatin
13. essor operation should function normally with each furnace circulation blower operating at the speeds connected to their respective cool speed taps after cooling blower on delay When the call for cooling ends the circulation blowers will stop upon the completion of the cooling off delay 441 06 1003 02 10 2001 Connection of Twinning Leads and Locating Isolation Relay On Furnace 1 Control Panel CONTROL PANEL Located In Blower Compartment fli a BLWR 8 E Transformer QO ST9120C40 ELECTRONIC FAN CONTROL Twinning Leads ST9120 C G Y W R ISOLATION RELAY SPST DRILL TWO 1 8 Dia CONTROL PANEL Located In Blower Compartment Transformer ST9160B dd M1 M2 ELECTRONIC FAN CONTROL ST9160 SS Twinning Leads ISOLATION RELAY SPST DRILL TWO 1 8 Dia
14. g blower compartment on the same panel as the electronic fan control in furnace 1 see Figure 1 and Figure 2 Refer to single stage or two stage thermostat wiring as noted below Single Stage Thermostat Operation Reference Figure 6 and Figure 7 1 Two Interconnect the thermostat wiring in parallel from the thermostattotheterminal blocks on each fan control forthe and Y connections only Interconnect the wiring from the C connections at the terminal blocks on each fan control Note The Y connection is not required if air conditioning is not available Connect wire from W connection at the thermostat to the W connection of the electronic fan control of furnace 1 Connect wire from R connection at the thermostat to the connection of the electronic fan control of furnace 1 Connect wire from the W connection of the electronic fan control of furnace 1 to one side of the 24Vac coil of the isolation relay terminal 43 Wire terminals for connection to the isolation relay are provided in the kit Connect wire from the connection of the electronic fan control offurnace 1 tothe other side ofthe 24Vac coil ofthe isolation relay terminal 1 Connect one wire to each ofthe normally open terminals of the isolation relay terminals 2 and 4 and connect to the R and W connections at the electronic fan control of furnace 2 Set the heat delay off timings on each control to the same
15. ng For Two Stage Heating amp Cooling ELECTRONIC FAN CONTROL FURNACE 1 WALL THERMOSTAT OO OO Q O 1 2 ELECTRONIC FAN CONTROL FURNACE 2 HUM HEAT EAC Connect H to H M1 M2 Connect C to C Y CO CONDENSER RELAY ISOLATION 25 23 81a
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