AERCO KC1000 Heater 2002 - Manual (Page 41)

SAFETY DEVICE TESTING
5-5
5.10 PURGE SWITCH OPEN DURING
PURGE
1. Set the unit’s
ON/OFF switch to the OFF
position. Place the unit in manual mode and
set the fire rate between 25% and 30%.
2. Remove the air/fuel valve cover by rotating
the cover counterclockwise to unlock it and
then pulling it towards you. See Fig. 5.7.
3. Remove one of the two wires from the purge
switch (Fig. 5.8) and start the unit.
4. The unit should begin to start, then shut
down and display PRG SWITCH OPEN
DURING PURGE.
5. Replace the wire on the purge switch and
depress the
CLEAR button. The unit should
restart.
VALVE
COVER
Figure 5.7
Air/Fuel Valve Cover Location
5.11 IGNITION SWITCH OPEN DURING
IGNITION
1. Set the unit’s
ON/OFF switch to the OFF
position. Place the unit in manual mode and
set the fire rate between 25% and 30%.
2. Remove the air/fuel valve cover (Fig. 5.7) by
rotating the cover counterclockwise to
unlock it then pulling it towards you.
3. Remove one of the two wires from the
ignition switch (Fig. 5.8) and start the unit.
4. The unit should begin to start and then shut
down and display IGN SWITCH OPEN
DURING IGNITION.
5. Replace the wire on the ignition switch and
depress the
CLEAR button. The unit should
restart.
IGNITION
POSITION
SWITCH
PURGE
POSITION
SWITCH
169 170 172 171
STEPPER
MOTOR
DIAL
BLOWER
BURNER
Figure 5.8
Air/Fuel Valve Purge and Ignition Switch
Locations