Summary of the content on the page No. 1
TwinningKitNAHA003WK.01
For UseWithFurnaceModelsUsing
Honeywell ST9120andST9160ElectronicFanControls
Pleasereadtheseinstructionscompletelybeforeattemptinginstallation.
FurnaceInstallation
!
RefertotheInstallationInstructionspackedwiththefurnacesfor
Electrical shock hazard/Fire and/or explosion haz-
information about clearances, start--up and maintenance, gas
ard.
piping and vent installation.
Turnoffelectricpowersupplyatdisconnectswitch
orservicepanelbeforestartinginstallation.
CAUTION
Turn off
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GandYconnectionsonly.Interconnectthewiringfrom InstallationProcedures the C connections at the terminal blocks on each fan control. Note: The Y connection is not required if air 1. Remove line power from both appliances before starting conditioning is not available. installation of the twinning kit. 2. Connect wire from W1 of the thermostat to the W 2. Locate the Z1 and Z2 or C to C and H to H connections connection of the electronic fan control of furnace #1. along one edge of each
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Figure1 ConnectionofTwinningLeadsandLocatingIsolationRelayOnFurnace#1ControlPanel CONTROLPANEL(Located In Blower Compartment). Z1 Transformer T W I N ST9120C40 ELECTRONIC FAN CONTROL Twinning Leads ST9120 4 ISOLATION RELAY (SPST) 2 DRILLTWO 1/8 Dia. 1 3 CONTROLPANEL(Located In Blower Compartment). Transformer DATA ELECTRONIC FAN CONTROL ST9160 Twinning Leads 4 ISOLATION RELAY (SPST) 2 DRILLTWO 1/8 Dia. 1 3 25--23--77 3 TWIN H C ST9160B
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Figure2 CONTROLSFORST9210&ST9160 ELECTRONIC FAN CONTROL ELECTRONIC FAN CONTROL (ST9120) (ST9120) Z1 T W I N Twinning Leads Connect Z1To Z1 AndZ2ToZ2. ELECTRONIC FAN CONTROL ELECTRONIC FAN CONTROL (ST9160) (ST9160) DATA DATA Twining Leads Connect HTo H And CTo C. 25--23--78 441 06 1003 02 (10/2001) 4 ST9160B TWIN C H ST9160B
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Figure3 ProperConnectionofTwinningLeadsforST9120&ST9160 FURNACE #2 FURNACE #1 Splice if Required,to obtain necessary length. Bushings ST9120 ST9120 Z2TO Z2 ST9120C40 ST9120C40 Z1TO Z1 Twinning Leads 4 2 1 3 FURNACE #2 FURNACE #1 Splice if Required,to obtain necessary length. Bushings ST9160 ST9160 HTOH CTOC Twinning Leads 4 2 1 3 25--23--79 5
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ProperConnectionofTwinningLeadsforST9120 Figure4 441 06 1003 02 (10/2001) 6
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Figure5 ProperConnectionofTwinningLeadsforST9160 Thermostat Wiring For Single Stage Heating ELECTRONIC ELECTRONIC FAN CONTROL FAN CONTROL FURNACE #1 FURNACE #2 WALL Connect H to H THERMOSTAT Connect C to C G R W R C Y W G R C Y W G 4 2 1 3 ISOLATION RELAY Thermostat Wiring For Two Stage Heating ELECTRONIC ELECTRONIC FAN CONTROL FAN CONTROL FURNACE #1 FURNACE #2 WALL Connect H to H THERMOSTAT Connect C to C G W2W1R R C Y G C W R W Y G ISOLATION RELAY 4 2 3 1 25--23--80 7 5 5 TWIN TWIN C H C H 5 5
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Figure6 ST9120 Thermostat Wiring For Single Stage Heating AndTwo Stage Cooling ELECTRONIC FAN CONTROL FURNACE #1 WALL Connect Z1To Z1 THERMOSTAT Connect Z2To Z2 Y1 G Y2 W1 R ELECTRONIC FAN CONTROL FURNACE #2 4 Y 2 C A/C ISOLATION CONDENSERS 1 3 RELAY Y C Thermostat Wiring For Two Stage HeatingAnd Single Stage Cooling ELECTRONIC FAN CONTROL FURNACE #1 Connect Z1To Z1 WALL THERMOSTAT Connect Z2To Z2 G Y W2W1R ELECTRONIC FAN CONTROL FURNACE #2 4 2 3 ISOLATION A/C 1 Y RELAY C 25--23--82 CONDENSER 44
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Figure7 ST9160 Thermostat Wiring For Single Stage Heating AndTwo Stage Cooling ELECTRONIC FAN CONTROL ELECTRONIC FURNACE #2 FAN CONTROL FURNACE #1 WALL Connect H to H THERMOSTAT Connect C to C Y2 Y1 R G W1 R C W Y G C R W Y G 4 Y 2 C A/C ISOLATION CONDENSERS 1 3 RELAY Y C Thermostat Wiring For Two Stage HeatingAnd Single Stage Cooling ELECTRONIC FAN CONTROL ELECTRONIC FURNACE #2 FAN CONTROL FURNACE #1 WALL Connect H to H THERMOSTAT Connect C to C G Y W2W1R C R Y G C W R W Y G 4 2 A/C 3 ISOLATION
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Figure8 Thermostat Wiring For Single Stage Heating And Cooling. ELECTRONIC FAN CONTROL FURNACE #1 Connect Z1To Z1 WALL THERMOSTAT Connect Z2To Z2 G Y R W ELECTRONIC FAN CONTROL FURNACE #2 4 2 3 1 A/C ISOLATION Y C CONDENSER RELAY Thermostat Wiring For Two Stage Heating & Cooling ELECTRONIC FAN CONTROL FURNACE #1 WALL Connect Z1To Z1 THERMOSTAT Connect Z2To Z2 Y1 G Y2 W2 R W1 ELECTRONIC FAN CONTROL FURNACE #2 4 Y 2 C A/C CONDENSERS 1 3 Y ISOLATION RELAY C 25--23--83 441 06 1003 02 (10/2001) 10
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Figure9 Thermostat Wiring For Single Stage Heating And Cooling ELECTRONIC FAN CONTROL ELECTRONIC FURNACE #2 FAN CONTROL FURNACE #1 WALL Connect H to H THERMOSTAT Connect C to C G R Y W R C W Y G R C W G Y 4 2 ISOLATION 1 3 Y RELAY A/C C CONDENSERS Thermostat Wiring For Two Stage Heating & Cooling ELECTRONIC FAN CONTROL ELECTRONIC FURNACE #2 FAN CONTROL FURNACE #1 WALL Connect H to H THERMOSTAT Connect C to C G Y2 W2W1R Y1 R C Y W G R C Y W G Y 4 C 2 Y 3 ISOLATION 1 A/C RELAY C CONDENSER s 25--23
