18
441 01 5003 01
Specifications are subject to change without notice
Final Check
FIRE OR EXPLOSION HAZARD.
Failure to follow this warning could result in
personal injury, death and/or property damage.
Never test for gas leaks with an open flame. Use a
commercially available soap solution made
specifically for the detection of leaks to check all
connections. A fire or explosion may result causing
property damage, personal injury or loss of life.
!
WARNING
•
Test all pipe for leaks.
•
If orifices were changed, make sure they are checked for leaks.
•
During pressure testing of gas supply piping system:
a. If test pressure does not exceed
1
/
2
″
psi, isolate the
furnace from the gas supply piping system by closing the
equipment shutoff valve.
b. If test pressure exceeds
1
/
2
″
psi, the furnace and its
manual equipment shutoff valve must be disconnected from
the gas supply piping system.
•
To check for leaks apply soap suds or a liquid detergent to each
joint. Bubbles forming indicate a leak.
•
Correct even the smallest leak at once.
9. Electrical Wiring
ELECTRICAL SHOCK HAZARD.
Failure to follow this warning could result in
personal injury or death.
Turn OFF electrical power at fuse box or service
panel before making any electrical connections and
ensure a proper ground connection is made before
connecting line voltage.
!
Power Supply Wiring
The furnace
MUST
be electrically wired and grounded in
accordance with local codes, or in the absence of local codes, with
the National Electrical Code (NEC), ANSI/NFPA 70--2005.
The power supply to the furnace connections must be between 198
VAC and 242 VAC during furnace operation for acceptable
performance.
Field wiring connections must be made inside the furnace
connection box. A suitable strain relief should be used at the point
the wires exit the furnace casing.
Copper conductors shall be used.
Line voltage wires should
conform to temperature limitation of 63
°
F (35
°
C) rise. Wire and
circuit breaker sizing shall be based on the ampacity of the furnace
electrical components plus the amps for all installed accessories
(1.0 amps total for EAC and HUM). Ampacity can be determined by
using the NEC or CEC.
Furnace must be installed so the electrical components are
protected from water and connected to its own separate circuit.
Junction Box (J- Box) Relocation
The J--Box is installed in the burner compartment on left side of
casing. An alternate J--Box location on right side can be used.
1. Remove and save two screws holding J--Box to casing.
2. Move large hole plug from right to left J--Box location.
3. Clip wire tie holding the J--Box wires.
4. Move J--Box to alternate location and attach using two screws
removed from left side location.
5. Position all wires away from sharp edges, hot surfaces, and
moving parts. Do not pinch J--Box wires or other wires when
reinstalling burner compartment door.
Thermostat
Thermostat location has an important effect on the operation of the
furnace. Follow instructions included with thermostat for correct
mounting and wiring.
Low voltage connections to furnace must be made on terminal
board to fan control. (See
Figure 17
)
If cooling is used, the
Y
from the thermostat must be connected to
the control board
Y
to energize cooling blower speed.
Heat anticipator setting will need to be measured if 24VAC
humidifier is installed. Measure current in series from R to W at the
thermostat. Be sure 24VAC humidifier is wired up to control. Allow
furnace to operate for 2 minutes before recording the AC amperage
reading. Set anticipator on thermostat to recorded value.
Optional Equipment
All wiring from furnace to optional equipment
MUST
conform to
local codes or, in the absence of local codes, the applicable national
codes. Install wiring in accordance with manufacturer’s
instructions.
Humidifier/Electronic Air Cleaner
The furnace is wired for 220 VAC humidifier and/or electronic air
cleaner connection.
!
REDUCED FURNACE LIFE HAZARD.
Failure to follow this caution may result in reduced
furnace life.
Do NOT exceed 220V/0.8 amp. maximum current
load for both the EAC terminal and the HUM
terminal combined.
CAUTION
HUMIDIFIER -- The 24VAC HUM is energized when the
pressure switch closes on a call for heat. The HUM (220VAC) is
energized when the inducer is energized.
ELECTRONIC AIR CLEANER -- EAC is energized when there
is a blower speed call, except is NOT energized when blower
operates in the hard--wired continuous fan mode.
