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Burner Set-up - Gas
Fig. 4
MVD-LE valve, side view
Flow adjustment cap
Pan head screw
Sealing cap/adjustment cap tool
(continued)
Burner manifold gas pressure
adjustment
IMPORTANT
The burner manifold gas pressure
settings must be performed using the
RV52 gas appliance regulator only.
In the event of low gas supply pressure,
increase gas supply pressure using the
RV52 gas regulator to required
minimum gas supply pressure.
Operating and Installation
Instructions for gas train
components (supplied)
IMPORTANT
No preliminary adjustments required for
Honeywell V8295 N.C. gas solenoid
valve.
Fig. 5
MVD-LE valve, top view
Adjustment steps
1. Attach manometer to burner manifold
test point (combustion head
2. Start up burner and observe.
3. Wait until burner has stabilized to
adjust burner manifold pressure using
the RV52 gas appliance regulator,
and set to required burner manifold
pressure setting.
Use factory default settings (pages
15 and 16) as starting point only.
4. To adjust the initial lift gas pressure
remove sealing cap, exposing the lift
adjustment knob, turn over cap,
adjust knob to "+" to increase the
start pressure and set to approx. 0.7
to 0.9 "w.c. (manifold pressure).
IMPORTANT
Factory default setting is set to 100%
full flow.
5. Restart appliance at least three times
to finalize gas manifold setting and to
determine a smooth ignition.
6. If burner fails to ignite or ignition is
delayed or hard, one or more of the
following corrective actions may be
required:
Adjust initial gas pressure setting
H
on Dungs gas valve.
Ignition electrode and/or ionization
H
(flame) rod is not set within
specified range, adjust setting by
referring to original Installation
Instructions of Riello burner.
Set-up
).
7
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