Carrier AGATWNPME01B Installation Instructions Manual page 13

AGATWNPME01B: Installation Instructions
Install Main Twinning Kit Harness
NOTE: If the furnaces are installed back-to-back, verify which furnace
is the Main furnace before installing Twinning Kit Harnesses. Refer to
the tag on the ends of the Extension harness used for back-to-back
installations.
The Main Twinning Kit harness is identified by a white label marked
"MAIN" on the label near the two pin receptacle of the Main Auxiliary
Limit Switch (ALS-M) leads. The Twinning Kit Relay (TKR) and Main
Auxiliary Limit Switch (ALS-M) mount to the blower housing as shown
in Fig. 19. The individual leads are labeled on the harness, see
Refer to Fig. 20 for location of control board components. Connect the
Main Twinning Kit harness to furnace control board as follows:
1. Remove the Red transformer lead from the "SEC-1" terminal on the
Main furnace control board.
2. Connect the Red transformer lead removed from the Main furnace
control board to the Red wire labeled "TRANS" on the Main
Twinning Kit harness.
3. Connect the Orange wire labeled "SEC 1" to the "SEC-1" terminal
on the Main furnace control board.
4. Connect the Black wire with the fork terminal labeled "C" on the
TKR to the "COM/24V" terminal on the thermostat strip of the
Main furnace control board.
5. Install the Twinning Kit Relay, (TKR)
a. For single-stage operation of single-stage furnace connect the
white wire with the fork terminal labeled "W" on the TKR to the
"W" terminal on the thermostat strip of the Main furnce control
board, see Fig. 31.
b. For staged operation of single-stage furnaces with a two-stage
thermostat, remove the fork terminal from the terminal on the
TKR and discard. The thermostat W2 lead is spliced into this
wire. Refer to Fig. 30 and Thermostat Connections section for
details.
c. For operation of two-stage furnaces with a single-stage or
two-stage thermostat, connect the white wire with the fork
terminal on the TKR to the "W/W1" terminal on the thermostat
strip of the Main furnace control board. Refer to
Thermostat Connections section for details.
6. If using the extension harness, connect the 2-pin and 4-pin plugs of
the main twinning harness to the 2-pin and 4-pin plugs of the
extension harness. If the extension harness is not being used, go to
"Install Secondary Twinning Harness."
Install Secondary Twinning Kit Harness
The Secondary Twinning Kit harness is identified by a white label
marked "SECONDARY" on the label near the two pin plug of the
Auxiliary Limit Switch (ALS-S) leads. The Door Interlock Relay (ILR)
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 17 – Extension Harness
and Secondary Auxiliary Limit Switch (ALS-M) mount to the blower
housing as shown in
harness, see
furnace control board as follows:
1. Connect the Black wire with the fork terminal labeled "C
SECONDARY" to the "COM/24V" terminal on the thermostat strip
of the Secondary furnace control board.
2. Connect the White wire with the fork terminal labeled "W
SECONDARY" to the "W" or "W/W1" terminal on the thermostat
strip of the Secondary furnace control board.
Fig. 21.
3. Connect the Red wire with the fork terminal labeled "R
SECONDARY" to the "R" terminal on the thermostat strip of the
Secondary furnace control board.
4. Remove the Red transformer lead from the "SEC-1" terminal on the
Secondary furnace control board.
5. Connect the Red wire with the piggy-back terminal labeled
"SEC-1" on the ILR to the "SEC-1" terminal on the Secondary
furnace control board.
6. Connect the Red transformer lead to the piggy back terminal of the
Red wire connected to the "SEC-1" terminal on the Secondary
furnace control board.
7. Remove the Blue transformer lead from the "SEC-2" terminal on
the Secondary furnace control board.
8. Connect the Black wire with the piggy-back terminal labeled "C"
on the ILR to the "SEC-2" terminal on the Secondary furnace
control board.
9. Connect the Blue transformer lead to the piggy back terminal of the
Black wire connected to the "SEC-2" terminal on the Secondary
furnace control board.
10. If using the extension harness, connect the 2-pin and 4-pin plugs of
the secondary twinning kit harness to the 2-pin and 4-pin plugs of
the extension harness. If the extension harness is not being used,
connect the 2-pin and 4-pin plugs of the secondary twinning kit
harness to the 2-pin and 4-pin plugs of the main twinning kit
harness.
Fig. 29 and Install Communication (PL7) Connector
There are two Communication Connectors that provide communication
from the Main furnace to the Secondary furnace.
In side-by-side installations, remove the green yellow and white wires
from the extension harness. Route the three wires through the snap
bushing in the blower compartment of the furnaces.
Connect the wires to each PL7 plug as follows:
1. Green to Green on the Communication Connector.
2. Yellow to Yellow on the Communication Connector.
3. White to White on the Communication Connector.
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Fig. 19. The individual leads are labeled on the
Fig. 22. Connect the Secondary Twinning Kit harness to
L14F011