International comfort products F8MVL Installation Instructions Manual page 32

Start−Up Procedures
WARNING
!
FIRE OR EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury, death, and/or property damage.
Never purge a gas line into a combustion chamber.
Never test for gas leaks with an open flame. Use a
commercially available
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
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury, or death.
Blower access door switch opens 115−v power to
control. No component operation can occur unless
switch is closed. Caution must be taken when
manually closing this switch for service purposes.
1. Purge gas lines after all connections have been made.
2. Check gas lines for leaks.
3. To Begin Component Self−Test:
Remove Blower Access Door. Disconnect the thermostat
R lead from furnace control board. Manually close blower
door switch. Turn Setup DIP switch SW1−6 ON. (See
Figure 26, Figure 55 and Table 9)
32
soap solution made
Specifications are subject to change without notice.
NOTE: The furnace control allows all components, except the
gas valve, to be run for short period of time. This feature helps
diagnose a system problem in case of a component failure.
Component test feature will not operate if any thermostat
signal is present at the control.
Refer to service label attached to furnace or See Figure 51.
Component test sequence is as follows:
a. Inducer motor starts on high−speed and continues to
run until Step d. of component test sequence.
b. Hot surface igniter is energized for 15 sec., then off.
c. Blower motor operates for 15 sec.
d. Inducer motor goes to low−speed for 10 sec., then
stops.
e. After component test is completed, one or more
status codes (heartbeat, 2+5) will flash. See com-
ponent test section of service label (Figure 51) in
furnace for explanation of status codes.
NOTE: To repeat component test, turn setup switch SW1−6
OFF, then back ON.
4. Turn setup DIP switch SW1−6 OFF. Reconnect R lead to
furnace control board, release blower door switch and rein-
stall blower access door.
5. Operate furnace per instruction on inner door.
6. Verify furnace shut down by lowering thermostat setting
below room temperature.
7. Verify furnace restarts by raising thermostat setting above
room temperature.
Adjustments
WARNING
!
FIRE HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
DO NOT bottom out gas valve regulator adjusting
screw. This can result in unregulated manifold
pressure and result in excess overfire and heat
exchanger failures.
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