Table of Contents
Advertisement
Furnace
Cabinet
Input
Width
(Btuh)
(in.)
60,000
19.75
80,000
19.75
92,000
19.75
110,000
22.50
* Time-delay fuses or HACR-type circuit breakers are required.
the fault condition which caused the switch
to trip.
5.
The blower door is in place, closing the door
switch in the line voltage circuit.
6.
The gas line has been purged and all con-
nections are leak tight.
Start-up Procedures
After all of the above checks have been made:
1.
Close the disconnect(s) to provide line volt-
age to the furnace.
2.
Set thermostat controller using the installer's
instructions (also refer to Table 1). Note: Al-
low thermostat controller to go through fan
calibration routine. This will take 60 seconds
switch the system mode to heat.
3.
Set the thermostat controller above room
temperature and verify the operating
sequence. (See the Sequence of Opera-
tion).
INTERFACE
BOARD
Nominal
Maximum
Electrical
Operating
Supply
Voltage
115-60-1
127
115-60-1
127
115-60-1
127
115-60-1
127
Table 10. Electrical Data
ROUTE WIRES
THRU RING CORE
RED
R
YELLOW
DX+
DX-
WHITE
GREEN
GND
Figure 22. Thermostat wiring in fi eld
Minimum
Maximum
Minimum
Operating
Furnace
Voltage
Amperes
Gauge
103
12
103
12
103
12
103
12
4.
After the furnace has run for approximately
fi ve minutes, set the thermostat below room
temperature and verify steps (8) through
(11) of the Sequence of Operation.
Verifying and Adjusting Firing Rate
The fi ring rate must be verifi ed for each installa-
tion to prevent over-fi ring the furnace.
IMPORTANT NOTE:
The fi ring rate must not exceed the rate shown
on the furnace rating plate. At altitudes above
2000 feet it must not exceed that on the rating
plate less 4% for each 1000 feet.
Follow the procedure below to determine the
fi ring rate.
1.
Shut off all other gas fi red appliances.
2.
Start the furnace and allow it to run for at
least three minutes.
C
W2
RH
R
W1
H
Maximum
Wire
Fuse or Circuit
Breaker Amps*
14
15
14
15
14
15
14
15
A
B
GD
OD
ID
GD
27
Advertisement
Table of Contents
