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Use a separate fused branch electrical circuit containing prop-
erly sized wire, and fuse or circuit breaker. The fuse or
circuit breaker must be sized in accordance with the maxi-
mum overcurrent protection specified on the unit rating plate.
An electrical disconnect must be provided at the furnace
location.
Connect hot, neutral, and ground wires as shown in the wir-
ing diagram located on the unit's blower door. For direct
vent applications, the cabinet opening to the junction box
must be sealed air tight using either an UL approved bushing
such as Heyco Liquid Tight or by applying non-reactive UL ap-
proved sealant to bushing.
Line polarity must be observed when making field connec-
tions. Line voltage connections can be made through either
the right or left side panel. The furnace is shipped config-
ured for a right side (left side for counterflows) electrical
connection with the junction box located inside the burner
compartment. To make electrical connections through the
opposite side of the furnace, the junction box must be relo-
cated to the other side of the burner compartment prior to
making electrical connections. To relocate the junction box,
follow the steps shown below.
NOTE: Wire routing must not interfere with circulator blower
operation, filter removal, or routine maintenance.
J
B
R
UNCTION
OX
ELOCATION
E
DGES OF SHEET METAL HOLES MAY BE SHARP
PRECAUTION WHEN REMOVING HOLE PLUGS
T
O PREVENT PERSONAL INJURY OR DEATH DUE TO ELECTRIC SHOCK
DISCONNECT ELECTRICAL POWER BEFORE INSTALLING OR SERVICING THIS
.
UNIT
HIGH VOLTAGE !
T
O AVOID THE RISK OF INJURY
,
DEATH
THE FURNACE MUST BE ELECTRICALLY
GROUNDED IN ACCORDANCE WITH LOCAL CODES OR IN
,
THEIR ABSENCE
WITH THE LATEST EDITION OF THE
N
E
C
. US: National Electrical
ATIONAL
LECTRIC
ODE
Code (NEC) ANSI/NFPA 70-2011. In CANADA:
Canadian Electrical Code CSA C22.1.
Line voltage connections can be made through either the right
or left side panel. The furnace is shipped configured for a right
side electrical connection. To make electrical connections
through the opposite side of the furnace, the junction box must
be relocated to the left side prior to making electrical connec-
tions. To relocate the junction box, perform the following steps.
1. Remove the burner compartment door.
2. Remove and save the two screws securing the junction
box to the side panel.
WARNING
. U
SE GLOVES AS A
.
WARNING
WARNING
,
ELECTRICAL SHOCK OR
3. Relocate junction box and associated plugs and grommets
to opposite side panel. Secure with screws removed in
step 2.
T
O AVOID THE RISK OF INJURY
FURNACE MUST BE ELECTRICALLY GROUNDED IN ACCORDANCE WITH
LOCAL CODES OR
E
NATIONAL
LECTRICAL
To ensure proper unit grounding, an earth ground wire must
be connected between the furnace ground screw located in-
side the furnace junction box and the electrical service panel.
NOTE: Do not use gas piping as an electrical ground. To con-
firm proper unit grounding, turn off the electrical power and
perform the following check.
1. Measure resistance between the neutral (white)
connection and one of the burners.
2. Resistance should measure 10 ohms or less.
This furnace is equipped with a blower door interlock switch which
interrupts unit voltage when the blower door is opened for ser-
vicing. Do not defeat this switch.
24 V
T
OLT
HERMOSTAT
W
IRE ROUTING MUST NOT INTERFERE WITH CIRCULATOR BLOWER
,
OPERATION
FILTER REMOVAL OR ROUTINE MAINTENANCE
A
REMOVABLE PLUG CONNECTOR IS PROVIDED WITH THE FURNACE
CONTROL TO MAKE THERMOSTAT WIRE CONNECTIONS
,
BE REMOVED
WIRE CONNECTIONS MADE TO THE PLUG
. I
STRONGLY
REPLACED
T IS
BE JOINED WITH A WIRE NUT AND A SINGLE CONDUCTOR BE INSERTED
,
UNDER THE TERMINAL SCREW
INTERMITTENT OPERATION
HEAT SET-UP DIP SWITCH
MATCH THERMOSTAT TYPE
, DIP
THERMOSTAT
ALSO THE CORRECT SETTING FOR A NON
. T
THERMOSTAT
O USE
MODULATING THERMOSTAT
OFF
IN THE
POSITION
POSITION WHEN USING A NON
.
THERMOSTAT
When installed with a non-communicating thermostat, the
furnace integrated control module provides terminals for both
"W1" and "W2", and "Y1" and "Y2" thermostat connections.
This allows the furnace to support the following system appli-
cations: 'Two-Stage Heating Only', 'Two-Stage Heating with
Single Stage Cooling', and 'Two-Stage Heating with Two-Stage
WARNING
,
ELECTRICAL SHOCK OR DEATH
,
,
IN THEIR ABSENCE
WITH THE LATEST EDITION OF THE
C
.
ODE
W
IRING
RECOMMENDED THAT MULTIPLE WIRES
. F
AILURE TO DO SO MAY RESULT IN
.
IMPORTANT NOTE
-
DIP
#13 MUST
SWITCH
. T
CTK01
O USE THE
#13
SWITCH
MUST BE SET TO
-
COMMUNICATING
CTK02**, CTK03**
OR
,
CHECK TO MAKE SURE
(
). T
FACTORY POSITION
HIS IS ALSO THE CORRECT
-
COMMUNICATING SINGLE
,
THE
.
. T
HIS PLUG MAY
,
AND
BE SET TO
COMMUNICATING
ON
. T
POSITION
HIS IS
2-
STAGE
CTK04**
DIP
#13
SWITCH
IS
-
STAGE
29
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