18
Factory Installed J--Box Location
Install power entry hole filler plugs (factory--supplied in loose parts
bag) in unused power entry holes. (See Fig. 21.)
FACTORY
INSTALLED
LOCATION
UNUSED 7/8-IN. (22 mm)
DIAMETER POWER
ENTRY HOLES
POWER ENTRY HOLE
FILLER PLUG (FACTORY-
SUPPLIED LOOSE PARTS BAG)
A05113
Fig. 21 -- Factory Installed J--Box Location
J--Box Relocation
1. Remove 2 screws holding auxiliary J--box. (See Fig. 22.)
2. Rotate J--box 180
_
and attach box to left side, using holes
provided.
3. Install power entry hole filler plugs (factory--supplied loose
parts bag) in unused power entry holes. (See Fig. 22.)
FIRE OR ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in
intermittent unit operation or performance satisfaction.
If manual disconnect switch is to be mounted on
furnace, select a location where a drill or fastener will
not contact electrical or gas components.
!
WARNING
CONTINUOUS FAN (CF) SETUP SWITCHES
The CF setup switches are used to select desired airflow when
thermostat is in continuous fan mode or to select low--cooling
airflow for two--speed cooling units. This setup feature allows
continuous fan airflow or low--cooling airflow to be adjusted. To
set desired continuous fan airflow or low--cooling airflow:
1. Remove main furnace door and blower access panel.
2. Locate CF setup switches on furnace control. (See Fig. 33.)
3. Determine desired continuous fan airflow or low--cooling
airflow.
4. Use wiring schematic to determine proper setup position of
CF switches. (See Fig. 23 and 39.)
5. Replace main furnace door and blower access panel.
Setup Switches (SW1)
The furnace control has 8 setup switches that may be set to meet
the application requirements. Position these setup switches for the
appropriate requirement.
1. Remove main furnace door and blower access panel.
2. Locate setup switches on furnace control. (See Fig. 33.)
3. See Table 9 for setup switch description.
4. Replace main furnace door and blower access panel.
NOTE
: If a bypass humidifier is used, setup switch SW1--3 (Low
Heat Rise Adjust) should be in ON position. This compensates for
the increased temperature in return air resulting from bypass.
NOTE
:
If modulating dampers are used, blower motor
automatically compensates for modulating dampers. If manual
disconnect switch is to be mounted on furnace, select a location
where a drill or fastener will not contact electrical or gas
components.
24--v wiring
Make field 24--v thermostat connections at 24--v terminal block on
furnace control. Y wire from thermostat MUST be connected to
Y/Y2 terminal on control, as shown in Fig. 19, for proper cooling
operation. The 24--v terminal block is marked for easy connection
of field wiring. (See Fig. 33.) The 24--v circuit contains a 3--amp,
automotive--type fuse located on furnace control. (See Fig. 33.)
Any electrical shorts of 24--v wiring during installation, service, or
maintenance may cause fuse to blow. If fuse replacement is
required, use only a fuse of identical size (3 amp) and type. The
furnace control will flash status code 24 when fuse needs
replacement.
NOTE
: Use AWG No. 18 color--coded copper thermostat wire for
lengths up to 100 ft. (30.4 M). For wire lengths over 100 ft. (30.4
M), use AWG No. 16 wire.
NOTE
: For additional thermostat connection diagrams, reference
Fig. 43--50.
Accessories
1. Electronic Air Cleaner (EAC)
The furnace control EAC terminals are energized with 115v
(1.0--amp maximum) during blower operation.
Connect an accessory Electronic Air Cleaner (if used) using
1/4--in. female quick connect terminals to the two male
1/4--in. quick--connect terminals on the control board
marked EAC--1 and EAC--2. The terminals are rated for
115VAC, 1.0 amps maximum and are energized during
blower motor operation. (See Fig. 33.)
FACTORY
INSTALLED
LOCATION
ALTERNATE
FIELD
LOCATION
POWER ENTRY HOLE
FILLER PLUG (FACTORY-
SUPPLIED LOOSE PARTS BAG)
UNUSED 7/8-IN. (22 mm) DIAMETER
POWER ENTRY HOLES
UNUSED 7/8-IN. (22 mm) DIAMETER
POWER ENTRY HOLES
POWER ENTRY HOLE
FILLER PLUG (FACTORY-
SUPPLIED LOOSE PARTS BAG)
A05058
Fig. 22 -- Relocating J--Box
355B
A
V
