INSTALLATION CONSIDERATIONS
25
ELECTRICAL CONNECTIONS
WARNING
T
O AVOID THE RISK OF ELECTRICAL SHOCK, WIRING TO THE UNIT MUST BE
PROPERLY POLARIZED AND GROUNDED.
WARNING
HIGH
VOLTAGE
D
ISCONNECT
ALL
POWER BEFORE SERVICING OR
INSTALLING THIS UNIT.
M
ULTIPLE POWER SOURCES MAY
BE PRESENT.
F
AILURE TO DO SO MAY CAUSE PROPERTY
DAMAGE, PERSONAL INJURY OR DEATH.
CAUTION
L
ABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS.
W
IRING ERRORS CAN COUSE IMPROPER AND DANGEROUS OPERATION.
V
ERIFY PROPER OPERATION AFTER SERVICING.
WIRING HARNESS
The wiring harness is an integral part of this furnace. Field al
-
teration to comply with electrical codes should not be required.
Wires are color coded for identification purposes. Refer to the
wiring diagram for wire routings. If any of the original wire as
supplied with the furnace must be replaced, it must be replaced
with wiring material having a temperature rating of at least
105° C. Any replacement wiring must be copper conductor.
115 VOLT LINE CONNECTIONS
Before proceeding with electrical connections, ensure that the
supply voltage, frequency, and phase correspond to that spec
-
ified on the unit rating plate. Power supply to the furnace must
be N.E.C. Class 1, and must comply with all applicable codes.
The furnace must be electrically grounded in accordance with
local codes or, in their absence, with the latest edition of The
National Electric Code, ANSI NFPA 70 and/or The Canadian
Electric Code CSA C22.1.
Use a separate fused branch electrical circuit containing
properly sized wire, and fuse or circuit breaker. The fuse or
circuit breaker must be sized in accordance with the maximum
overcurrent protection specified on the unit rating plate. An
electrical disconnect must be provided at the furnace location.
NOTE:
Line polarity must be observed when making field
connections.
WARNING
I
N 90% FURNACE UPRIGHT UPFLOW INSTALLATIONS, THE DRAIN TRAP MUST
BE MOUNTED ON THE OPPOSITE SIDE OF THE UNIT FROM THE JUNCTION
BOX.
T
HIS WILL REDUCE THE RISK OF WATER REACHING THE JUNCTION
BOX IN THE EVENT OF A BLOCKED DRAIN CONDITION.
Connect hot, neutral, and ground wires as shown in the wiring
diagram located on the unit’s blower door. Line polarity must
be observed when making field connections. Line voltage con
-
nections can be made through either the right or left side pan.
NOTE:
Wire routing must not interfere with circulator blower
operation, filter removal, or routine maintenance.
WARNING
T
O AVOID THE RISK OF ELECTRICAL SHOCK, INJURY, OR DEATH, THE
FURNACE MUST BE ELECTRICALLY GROUNDED IN ACCORDANCE WITH LOCAL
CODES OR, IN THEIR ABSENCE, WITH THE LATEST EDITION OF THE
N
ATIONAL
E
LECTRIC
C
ODE.
WARNING
HIGH
VOLTAGE
D
ISCONNECT
ALL
POWER BEFORE SERVICING OR
CHANGING ANY ELECTRICAL WIRING.
M
ULTIPLE POWER
SOURCES MAY BE PRESENT.
F
AILURE TO DO SO MAY CAUSE
PROPERTY DAMAGE, PERSONAL INJURY OR DEATH.
24 VOLT HUMIDIFIER
A 24 volt humidifier can be connected to the normally open
terminal of the main pressure switch. The humidifier common
would then be connected to "C" on the control board low volt
-
age terminal strip.
If it is necessary for the installer to supply additional line voltage
wiring to the inside of the furnace, the wiring must conform to
all local codes, and have a minimum temperature rating of
105°C. All line voltage wire splices must be made inside the
furnace junction box.
24 VOLT THERMOSTAT WIRING
NOTE:
Low voltage connections can be made through either
the right or left side panel. Wire routing must not interfere
with circulator blower operation, filter removal, or routine
maintenance.
