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SYSTEM OPERATION
Connect hot, neutral, and ground wires as shown in the wiring
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 approved
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 configured
for a left side (right 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 relocated 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 to interfere with circulator blower
operation, filter removal, or routine maintenance.
JUNCTION BOX RELOCATION
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
Line voltage connections can be made through either the
right or left side panel. The furnace is shipped configured for
a left side electrical connection. To make electrical connec-
tions through the opposite side of the furnace, the junction
box must be relocated to the right side prior to making elec-
trical connections. 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.
3. Relocate junction box and associated plugs and grom-
mets to opposite side panel. Secure with screws re-
moved in step 2.
To ensure proper unit grounding, the ground wire should run
from the furnace ground screw located inside the furnace
junction box all the way back to the electrical panel. NOTE:
Do not use gas piping as an electrical ground. To confirm
proper unit grounding, turn off the electrical power and perform
the following check.
26
WARNING
. U
SE GLOVES AS A
.
WARNING
1. Measure resistance between the neutral (white) con-
nection 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 servicing. Do not defeat this switch.
EXTREMELY IMPORTANT: This system does not contain
an O wire input (reversing valve signal). If a heat pump is
installed, the thermostat should be setup for single stage
heat/single stage cool installs ( W= Heat Call and Y = Cool
Call). Setting thermostat for heat pump control will result in
incorrect performance.
QUICK START GUIDE
1. Connect all necessary thermostat wires to the thermo-
stat connector on the furnace control (only available
connections on the furnace are R & C for power, Y for
Cooling Calls, W for Heating Calls, G for Fan Calls,
Dehum for Dehumidification Calls. Furnace will control
staging of indoor unit and outdoor unit automatically
based on these inputs).
2. Make sure thermostat is set to single stage heat /
single stage cool mode. When a cool call is given,
24VAC should be applied to the Y terminal (G will
have 24VAC as well if a G wire is installed). When
a heat call is given 24VAC should be applied to the
W terminal (G may have 24VAC as well if a G wire
is installed). Even if a heat pump is installed, do not
setup the thermostat in heat pump mode. Single stage
,
heat / single stage cool mode is all that is required for
all applications. See rest of manual for any exceptions.
Do not setup thermostat in multi stage mode either,
it is not necessary.
3.
For communicating 2 stage AC/HP or inverter AC/
HP outdoor units, connect the 1&2 wires between
the indoor and outdoor unit. It is recommended for
2 stage applications that a separate transformer be
installed in the outdoor unit to provide 24VAC to the
outdoor control. R&C can be used between the indoor
and outdoor in 2 stage AC application but only if there
isn't already a transformer installed in the outdoor unit.
4. Turn on power to Indoor and Outdoor units
5. Charging outdoor unit: Provide a cooling call (Y or
Y+G) – this initial cooling call after the power is turned
on will run the outdoor unit at full capacity until the call
is removed. Use this mode for charging. If system is
running low stage cooling just cycle power and provide
a cool call again to ensure full capacity cooling.
6.
System Testing: Download the CoolCloud HVAC
phone application (see pages 31 and 32) and use it
to test all operations of both indoor and outdoor units.
7. Confirm thermostat heat (W or W+G) and cool (Y
or Y+G) function properly and the system is turning
on in the correct mode. The internal algorithms will
constantly be adjusting the staging times / cooling
capacities based on load changes to the space.
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