26
18-CD19D8-18
Installer’s Guide
SEE
NOTE 6
From Dwg. 21B342024 Rev. 0
2 STAGE
FURNACE
TWIN
SEE
NOTE 7
B/C
B/C
TO 115 V 1 PH.,
60 HZ., POWER
SUPPLY PER
LOCAL CODES
HUM SEE
NOTE 5
EAC SEE
NOTE 5
FIELD WIRING DIAGRAM FOR 2 STAGE FURNACE
2 STAGE HEATING
USING A 2 STAGE HEATING THERMOSTAT
NO COOLING
SEE
NOTE 6
From Dwg. 21B341333 Rev. 1
2 STAGE
FURNACE
TWIN
SEE
NOTE 7
FIELD ADDED JUMPER
W1 TO W2.
2ND STAGE WILL FIRE
10 MINUTES AFTER 1ST.
SEE
NOTE 8
B/C
B/C
TO 115 V 1 PH.,
60 HZ., POWER
SUPPLY PER
LOCAL CODES
HUM SEE
NOTE 5
EAC SEE
NOTE 5
FIELD WIRING DIAGRAM FOR 2 STAGE FURNACE
1 STAGE HEATING
USING A 1 STAGE HEATING THERMOSTAT
NO COOLING
Field Wiring Diagr
Primary drain vent stack
must terminate below
secondary heat exchanger
condensate drain outlet.
To drain opening
If upflow furnace is installed
over a finished ceiling, overflow
from the primary drain vent
stack must flow into an auxillary
drain pan to prevent damage to
the finished ceiling below.
*
