![background image](http://html1.mh-extra.com/html/carrier/kgatw0601hsi/kgatw0601hsi_installation-instructions-manual_2563046013.webp)
c. Connect TKR black wire labeled C from TKR to LH furnace control thermostat connection C
OM
24V.
d. Connect yellow wire labeled TEST to LH furnace control TEST/TWIN terminal.
e. If Extension Harness was used, connect 4-wire harness to Extension Harness.
NOTE:
If Extension Harness will not plug in to L/H and R/H furnaces, extension harness is installed backward. Remove extension harness and
re-install in correct orientation.
2. Install Auxillary Limit Switch (ALS-M) on L/H furnace:
a. Drill 1/8-in. hole in blower housing 12 in. below blower shelf. (See Fig. 11.)
b. Position ALS-M so reset button faces front of furnace.
c. Secure bracket to blower housing using a factory-supplied screw.
d. Disconnect red transformer wire from LH furnace control SEC-1 connection.
e. Connect red transformer wire connector to ALS-M wire connector PL7 labeled TRAN.
f. Connect orange ALS-M wire connector labeled DOOR SWITCH or SEC 1 to LH furnace control SEC-1 terminal.
g. If Extension Harness was used, connect 2-wire harness to Extension Harness
3. Install Secondary 4-wire harness on R/H furnace:
The Secondary Harness includes the Auxiliary Door Switch and Auxiliary Limit Switch. The harness is also tagged
″
Secondary Furnace
″
near the
plug ends of the harness.
a. Connect red wire labeled R-Secondary to RH furnace control thermostat connection R.
b. Connect white wire labeled W-Secondary to RH furnace control thermostat connection W.
c. Connect black wire labeled C-Secondary to RH furnace control thermostat connection C
OM
24V.
d. Connect yellow wire labeled TEST SECONDARY from LH furnace control TEST terminal to RH furnace control TEST terminal.
e. If the furnaces are side-by-side, route loose ends of 4-wire harness from Secondary furnace to Main furnace through snap bushings
previously installed between furnaces. (See Fig. 4.)
f. Connect Secondary 4-wire harness into 4-wire Main harness.
g. If Extension Harness was installed, connect 4-wire Secondary Harness to the Extension Harness.
4. Install Auxiliary Limit Switch, ALS-S on Secondary furnace:
a. Drill 1/8-in. hole in blower housing 12 in. below blower shelf. (See Fig. 11.)
b. Position ALS-S with terminals facing front of furnace.
c. Secure bracket to blower housing using factory-supplied screw.
Fig. 10A—TKR Relay Secured with Factory-Supplied Screws on Single-Stage Unit
A02233
TKR Relay-Secure w/2
factory-supplied screws
—13—