andrews 24/39, Installation Manual, Operation And Service Manual

Page: 36 / 96

36
COMMISSIONING SECTION 4
Hi-Flo RANGE
AUTO IGNITION
MODELS
Fig 25.
A
Pink MV
Black PV-MV
Purple PV
Gas control
Knob
B
Lighting the Burner
1. Ensure gas supply is ON.
2. Turn gas control knob to ON position.
3. Using control thermostat, select required water temperature.
4. Move electrical ON/OFF switch to ON. After a delay of about 10 seconds, the burner
will light.
5. Check pilot and main gas connections at gas control valve using leak detection fluid
whilst burner is alight. Turn off, seal any leakages, then re-test.
Shutting Off The Burner
For long periods only, (7 days or more) move electrical ON/OFF switch to OFF, then
turn gas control knob to OFF. Turn off gas service cock. For shorter periods, leave
heater under thermostat control.
Checking Main Burner Pressure
1. Turn gas control knob to OFF.
2. Release bleed screw A and connect pressure gauge tube.
3. Light burner as described previously.
4. Remove valve cap from port B and adjust pressure using exposed screw in accordance
with data plate.
Turn screw clockwise to increase pressure and counterclockwise to decrease.
If possible, check gas rate (see Technical Data) with meter and watch. Refit valve cap
to port B.
5. Turn gas control to PILOT. Remove pressure gauge tube and tighten bleed screw A.
6. Turn gas control knob to ON and light burner as described above.