Proheat M125 - Manual (Page 48)

4-11 PROHEAT M-SERIES G-II PCM SERVICE MANUAL
Test Procedure – Air Compressor pressure (Rotary Vane Compressor models):
Ensure fuel nozzle is clean (see page 4-7)and the air compressor filter is
clean (see page 4-9) before proceeding with air compressor pressure check.
h) Thread in Pressure Gauge Adapter hand tight as shown in Figure 4-10.
i) Install pressure Relief Valve & Pressure Gauge on to Pressure Gauge Adapter.
j) Orient Burner Head similar to assembled on heater.
k) Connect Power Harness and Remote Switch to the G-II PCM.
l) Switch the PROHEAT on and observe the air pressure:
o) Connect the Power, Dual Mode Temperature Sensor and Coolant Pump
electrical connections to the heater Burner Had and reconnect the fuel line.
p) Activate the heater with the remote switch and observe operation. The
heater should run smoothly with no smoke although there may be some
hesitation initially due to air in the fuel line.
q) Remove the remote switch and re-connect the control connection.
If a Start diagnostic code is indicated, proceed to Step 5.
MODEL AIR PRESSURE (ROTARY VANE COMPRESSOR)
M50 6.2 ± 0.1 PSI (42.7 ± 0.7 kPa)
M80 3.2 ± 0.1 PSI (22.1 ± 0.7 kPa)
M105 3.8 ± 0.1 PSI (26.2 ± 0.7 kPa)
NOTICE
Ensure to orient burner head as shown
in Figure 4-10 or an incorrect pressure
measurement may be made.
NOTICE
All plugs/harnesses must be rein-
stalled into the G-II Proheat Control
Module (G-II PCM) before heater
goes back into service.
WARNING
Connect power and switch only. DO
NOT connect the temperature sensor.
PRESSURE
GAUGE
ADAPTER
ROTARY VANE
COMPRESSOR
PRESSURE
RELIEF VALVE
FLAME
SHIELD
IGNITION
ELECTRODE
ASSEMBLY
Figure 4-10: Air Pressure Test. Rotary Vane Compressor Model.
DIGITAL
MANOMETER
(P/N PK0036)