Inspection Of The Gas Solenoid Valve - Henny Penny FlexFusion FPG-221 Service Instructions Manual

Fault messages & troubleshooting

Inspection of the gas solenoid valve

Prerequisite 1. Unit dead.
Preparing to measure the
pressure
118
Preparing for testing
a
b
a Offset measuring connection
(OUT)
2. On-site gas supply shut off.
3. Left side wall removed.
4. Unscrew the sealing screw of the pressure measurement nozzle
(OUT) on the gas solenoid valve.
5. Connect the gas pressure measurement device. Switch on digital
measurement device before connecting! The precision of the
magnetic valve should be at least 0.1 mbar.
Conducting the test
Switch the on-site gas supply back on.
Switch on the voltage.
Switch on unit and operate at maximum capacity.
Measure the gas pressure. When the gas fan starts up and the
gas solenoid valve is not yet energized, a vacuum of approx. -3
mbar must be measured.
If the vacuum is less, there is a leak on the heat exchanger in
the region between the solenoid valve and heat exchanger.
After opening of the gas solenoid valve by the ignition module, the
underpressure is reduced to < 0.5 mbar.
If the underpressure should remain unchanged at approx. 3
mbar, the gas solenoid valve or the ignition module are
defective.
Service-instructions
b Pressure measuring device