HEIL F8MVL - Furnace Start-Up Procedures and Adjustments; Start-Up Procedures and Warnings; Furnace Adjustments

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Start−Up Procedures
FIRE AND EXPLOSION HAZARD
Failure to follow this warning could cause personal
injury, death or property damage.
Never test for gas leaks with an open flame. Use a
commercially available soap solution made specifically
for detection of leaks to check all connections.
!
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.
!
WARNING
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 thermo-
stat R lead from furnace control board. Manually close
blower door switch. Turn Setup DIP switch SW1−6 ON.
(See Figure 26, Figure 56 and Table 10)
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, or 4+1) will flash. See
component 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 reinstall 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
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.
!
WARNING
FURNACE DAMAGE HAZARD
Failure to follow this caution may result in reduced
furnace life.
DO NOT redrill orifices. Improper drilling (burrs,
out−of−round holes, etc.) can cause excessive burner
noise and misdirection of burner flames. This can
result in flame impingement of heat exchangers,
causing failures. (See Figure 49)
CAUTION
!
Table 10 – Furnace Setup Switch Description
SETUP SWITCH
NO.
SWITCH NAME
NORMAL
POSITION
DESCRIPTION OF USE
SW1−1 Status Code Recovery OFF
Turn ON to retrieve up to 7 stored status codes for troubleshooting as-
sistance when R thermostat lead is disconnected.
SW1−2 Adaptive Heat Mode OFF
Allows 2−stage operation with a single stage thermostat. Turn ON when
using 2 stage thermostat to allow Low Heat operation when R to W/W1
closes and High Heat operation when R to W/W1 and W2 close.
SW1−3 Low Heat Rise Adjust OFF
Turn ON to increase Low Heat airflow by 18 percent. This compensates
for increased return air temperature caused with bypass humidifier.
SW1−4
Comfort/Efficiency
Adjustment
ON
Turn ON to decrease Low Heat airflow by 16 percent and High Heat
airflow 10 percent for maximum comfort.
SW1−5 CFM per ton adjust OFF Turn ON for 400 CFM per ton. Turn OFF for 350 CFM per ton.
SW1−6 Component Self−Test OFF
Turn ON to initiate Component Self−Test for troubleshooting assistance
when R thermostat lead is disconnected. Turn OFF when Self−Test is
completed.
SW1−7 Blower OFF delay ON or OFF
Control blower Off Delay time. Used in conjunction with SW1−8. See
Table 11.
SW1−8 Blower OFF delay ON or OFF
Control blower Off Delay time. Used in conjunction with SW1−7. See
Table 11.