SAFETY DEVICE TESTING
6-6
6.11 IGNITION SWITCH OPEN DURING
IGNITION
The Ignition Switch (and the Purge Switch) is
located on the Air/Fuel Valve. To check the
switch, proceed as follows:
1. Set the unit’s
ON/OFF
switch to the
OFF
position.
2. Place the unit in Manual Mode and set the
valve position between 25% and 30%.
3. Remove the Air/Fuel Valve cover (Figure
6-5) by rotating the cover counterclockwise to
unlock and lift up to remove.
4. Remove one of the two wires (#169 or #170)
from the Ignition Switch (Figure 6-6).
TO
BLOWER
STEPPER
MOTOR
DIAL
AIR
IN
5. Initiate a unit start sequence.
6. The unit should begin its start sequence and
then shut down and display
IGN SWITCH
IGNITION
POSITION
SWITCH
Figure 6-6
PURGE
POSITION
SWITCH
OPEN DURING IGNITION.
7. Replace the wire on the Ignition Switch and
press the
CLEAR
button. The unit should
restart.
Figure 6-5
Air/Fuel Valve Cover Location
Air/Fuel Valve Purge and Ignition Switch
Locations
6.12 SAFETY PRESSURE RELIEF
VALVE TEST
Test the safety Pressure Relief Valve in
accordance with ASME Boiler and Pressure
Vessel Code, Section VI.
Содержание Benchmark 3.0LN Series
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