Carrier AGATWNPME01B Installation Instructions Manual page 18

AGATWNPME01B: Installation Instructions
Two-Stage Furnaces with Single-Stage Thermostat
(Field Supplied)
See Fig. 29 and Table 4
NOTE: This application allows both two stage furnaces to operate in
low heat for first-stage heat mode or both furnaces to operate in high
heat for second-stage heat mode as determined by the staging algorithm
of the Main furnace control. See furnace Installation, Start-Up, and
Operating Instructions for further details on this heating mode.
To operate furnaces in two stage heating mode when a single-stage
thermostat controls the staging:
1. Connect thermostat W1 lead to "W/W1" on Main furnace control
board.
2. Turn LHT set-up switch on Main furnace control board to "OFF"
see Fig. 25.
3. Turn LHT set-up switch on RH control board to "ON."
4. Connect cooling thermostat lead Y to "Y/Y2" on the Main furnace
control board.
5. Connect the G thermostat lead to the "G" terminal on the Main
furnace control board.
6. Connect thermostat R lead to "R" terminal on Main furnace control.
7. Connect thermostat C or COM lead to the "COM/24V" terminal
on the Main furnace control board.
Fig. 25 – Furnace Thermostat Switch
Two-Stage Furnaces with Two-Stage Thermostat (Field
Supplied)
See Fig. 29 and Table 4
To operate furnaces in two stage heating mode when a two-stage
thermostat controls the staging:
1. Connect thermostat W1 to "W/W1" on Main furnace control board.
2. Connect thermostat W2 to "W2" on Main furnace control board.
3. Turn LHT set-up switch on Main furnace control board to "ON,"
see Fig. 26.
4. Turn LHT set-up switch on RH control board to "ON."
5. Connect first stage cooling thermostat lead Y1 to "Y/Y2" on the
Main furnace control board.
6. Connect the second stage cooling thermostat lead Y/Y2 to the pilot
duty relay coil for the second stage contactor.
7. Connect the G thermostat lead to the "G" terminal on the Main
furnace control board.
8. Connect thermostat R lead to "R" terminal on Main furnace control.
9. Connect thermostat C or COM lead to the "COM/24V" terminal on
the Main furnace control board.
Fig. 26 – Furnace Thermostat Switch
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Fig. 27 – Example of Setup Switch in OFF Position
Single-Stage Furnaces with Single-Stage Thermostat
(Field Supplied)
See Fig. 31 and
NOTE: This application allows both furnaces to operate together as a
single unit. See furnace Installation, Start-Up, and Operating Instructions
for further details on this heating mode.
1. Connect thermostat W lead to "W" on the Main furnace control
board.
2. Connect thermostat Y lead to "Y or Y/Y2" on the Main furnace
control board.
3. Connect the G thermostat lead to the "G" terminal on the Main
furnace control board.
4. Connect thermostat R lead to "R" terminal on Main furnace ontrol.
5. Connect thermostat C or COM lead to the "COM/24V" terminal on
the Main furnace control board.
Single-Stage Furnaces and A/C with Two-Stage
Thermostat (Field Supplied)
See Fig. 30 and
L14f009
NOTE: This application allows single--stage furnaces to operate with
one furnace or with both furnaces as determined by a two-stage
thermostat.
1. Connect thermostat W1 lead to "W" on the Main furnace control
board.
2. Connect thermostat W2 lead to White wire labeled "W" on the
twinning kit relay (TKR).
3. Connect first stage cooling thermostat lead Y1 to "Y/Y2" on the
Main furnace control board.
4. Connect the second stage cooling thermostat lead Y/Y2 to the pilot
duty relay coil for the second stage contactor.
5. Connect the G thermostat lead to the "G" terminal on the Main
furnace control board.
6. Connect thermostat R lead to "R" terminal on Main furnace control.
7. Connect thermostat C or COM lead to the "COM/24V" terminal on
the Main furnace control board.
8. Connect the G thermostat lead to the "G" terminal on the Main
furnace control board.
9. Connect thermostat R lead to "R" terminal on Main furnace control.
10. Connect thermostat C or COM lead to the "COM/24V" terminal on
the Main furnace control board.
Address Furnace Control Boards for Twinning
Each furnace control board must be addressed for twinned operation.
Addressing is achieved through DIP switches "TWN" located above the
AC and CFM Dip switch on SW2.
To address each control board, configure the DIP switches as shown
below:
L14F010
18
Table 3
Table 3
A07907