Installation guide

CIRCULATING AIR BLOWER SPEEDS
ELECTRICAL SHOCK HAZARD.
Failure to follow this warning could result in personal
injury, death and/or property damage.
Turn off electric power supply at disconnect switch or
service panel before removing access or service panels
from unit.
GAS HEATING
Available heating speeds are listed in Figure 13. The
heating speeds may be selected by adjusting dipswitches 3
and 4 on the motor interface board. The motor interface
board may be found in the control box assembly. Refer to
wiring diagram on inside of the access panel for dip switch
settings. Please note that the setting of dipswitches 3 and 4
affects both the low stage gas heating speed and the high
stage gas heating speed.
COOLING
Cooling speeds are listed in Figure 13. In dehumidification
mode, cooling airflow is reduced to 80% of nominal.
CONTINUOUS FAN OPERATION
For energy efficiency, continuous fan speed is 40% of the
high stage cooling speed,
COOLING
1. Turn electric power OFF
2. Set thermostat Heat-Cool select to COOL.
3. Adjust thermostat setting to below room temperature.
4. Turn power ON, for approximately one minute, then
OFF. During power application check the following:
a. Contactor - Contacts Closing
b. Compressor - ON
c. Condenser fan motor - ON
d. Circulating Air Blower - ON, Adustable delay ON of 0
or 30 seconds.
5. Turn power OFE check the following:
a. Contactor contacts opening.
b. Compressor - OFF
c. Condenser fan motor - OFF
d. Circulating blower - OFF, Adustable delay OFF of 0
or 90 seconds.
9. START-UP PROCEDURES
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
Do NOT attempt to light the burner with a match or
flame of any kind.
CHECK BEFORE STARTING
1. Check that the blower motor speed terminal block is
running the correct heating and cooling speeds.
2. Check to see that clean, properly sized air filters are
installed.
3, Replace all service access panels,
FIREOR EXPLOSIONHAZARD.
Failuretofollow this warning could resultin personalinjury
and/ordeath.
TurnOFFgasatshutoffbeforeconnectingU-tubemanometer.
/
Figure 14 J_ Honeywell Gas Valve
Regulator
Adjustment
©
tntlet Pressure
Tap 1/8 NPT
Outlet Pressure
Tap 1/8 NPT
GASPRESSURES
1. Do NOT allow gas supply pressure to fall below the
listed minimums. Doing so will decrease input to
furnace. Refer to Figure 15 for gas supply pressures.
2. Gas input MUST NOT exceed rated input shown on
rating plate.
3. Do NOT allow pressures to exceed the maximum limits
as listed in Figure 15.
Figure 15 Gas Pressures
Natural Gas Propane (LP) Gas
Minimum 4.5 in wc (1120 Pa) 11 in wc (2740 Pa)
Inlet
Recommended 7 in wc (1740 Pa) 11 in wc (2740 Pa)
Inlet
Maximum 13 in wc. (3230 Pa) 13 in wc (3230 Pa)
Inlet
Manifold Pressure Adjustment
Manifold pressures are listed in Tables 1 and 2. Check
manifold pressures using the following procedure.
1. With gas OFF, connect U-Tube manometer to outlet
pressure tap on gas valve (see figure 14). Use a
manometer with a 0" to 12" water column range.