Instruction manual

35
as indicated in the Specifications Sheet. These blower
speeds should be adjusted by the installer to match the
installation requirements so as to provide the correct
heating temperature rise and the correct cooling CFM.
To adjust the circulator blower speed, proceed as follows:
1. Turn OFF power to the furnace.
2. Select the heating and cooling blower speeds that
match the installation requirements from the airflow
table in the Specification Sheet.
3. Relocate desired motor leads to the circulator blower
heat and cool speed terminals on the integrated con-
trol module. (Terminals are identified as HEAT and
COOL (hot)). If heating and cooling blower speeds are
the same, a jumper wire must be used between the
heat and cool terminals.
3. Connect all unused blower motor leads to the “PARK”
terminals on the integrated control module. Any leads
not connected to the “PARK” terminals must be taped.
4. Turn ON power to furnace.
5. Verify proper temperature rise as outlined in Section
XIV, Startup Procedure and Adjustment - Tempera-
ture Rise .
Orange
High
Common/Neutral
Medium Low
Circulator Blower Speeds
Low Red
Medium Blue
Black
White
BLOWER HEAT OFF DELAY TIMINGS
The integrated control module provides a selectable heat
off delay function. The heat off delay period may be set to
60, 90, 120, 180 seconds using the DIP switches or jumper
provided on the control module. The delay is factory
shipped at 90 seconds but may be changed to suit the
installation requirements and/or homeowner preference.
Refer to the following figures for switch positions and
corresponding delay times.
60
Second
Delay
12
ON
ON
90
Second
Delay
21
60
180
120
90
120
Second
Delay
21
180
Second
Delay
2
1
DIP Switches
Jumper
60
180
120
90
60
180
120
90
60
180
120
90
ON
OFF
OFF
ON
OFF
OFF
Heat Off Delay Switches
XV. Normal Sequence of Operation
POWER UP
The normal power up sequence is as follows:
• 115 VAC power applied to furnace.
• Integrated control module performs internal checks.
• Integrated control module flashes LED one time.
• Integrated control module monitors safety circuits
continuously.
• Furnace awaits call from thermostat.
HEATING MODE
The normal operational sequence in heating mode is as
follows:
• R and W thermostat contacts close, initiating a call for
heat.
• Integrated control module performs safety circuit
checks.
• Induced draft blower is energized causing pressure
switch contacts to close. Humidifier terminals are
energized with induced draft blower.
• Igniter warm up begins upon close of pressure switch
contacts.
• Gas valve opens at end of igniter warm up period,
delivering gas to burners and establishing flame.
• Integrated control module monitors flame presence.
Gas valve will remain open only if flame is sensed.
• Circulator blower is energized on heat speed following
a fixed thirty second blower on delay. Electronic air
cleaner terminals are energized with circulator blower.
• Furnace runs, integrated control module monitors
safety circuits continuously.
• R and W thermostat contacts open, completing the call
for heat.
• Gas valve closes, extinguishing flame.
• Induced draft blower is de-energized following a fif-
teen second post purge. Humidifier terminals are de-
energized.
• Circulator blower is de-energized following a select-
able heat off delay period (60, 90, 120, or 180 sec-
onds). Electronic air cleaner terminals are de-ener-
gized.
• Furnace awaits next call from thermostat.
COOLING MODE
The normal operational sequence in cooling mode is as
follows:
• R and Y thermostat contacts close, initiating a call for
cool.
• Integrated control module performs safety circuit
checks.
• Outdoor fan and compressor are energized.
• Circulator blower is energized on cool speed following