Middleby Marshall PS629G Series, Owner'S Operating & Installation Manual

Page: 21 / 52

SECTION 2
INSTALLATION
21
Burner Assembly
D. Adjusting the Maximum Pressure Setting
1. Disconnect pressure feedback connection (if
applicable).
2. Connect a suitable pressure gauge to pipe line or
to outlet pressure tap of gas control concerned, to
measure burner pressure (measuring point must
be as near to burner as possible).
3. Make sure that the appliance is in operation and
the Moduplus
®
coil is energized with maximum
current.
4. If maximum rate pressure needs adjustment, use
an 8mm wrench to turn adjustment screw for
maximum pressure setting (clockwise to increase
or counter-clockwise to decrease pressure), until
the desired maximum outlet pressure is obtained.
5. Disconnect electrical connection of the Moduplus ®
on the white solenoid.
6. Check minimum pressure setting and readjust if
necessary. (See Adjusting Minimum Pressure
Setting for proper adjusting procedure.)
7. Reconnect pressure feedback connection (if
applicable).
8. If minimum and maximum pressures are set, wire
the Moduplus ® in circuit.
9. Close pressure tap screw.
E. Adjusting the Minimum Pressure Setting
1. Disconnect pressure feedback connection (if
applicable).
2. Connect a suitable pressure gauge to pipe line or
to outlet pressure tap of gas control concerned, to
measure burner pressure (measuring point must
be as near to burner as possible).
3. Disconnect electrical connection of the Moduplus ®
on the white solenoid.
4. Energize operator, set control in operation and
wait until an outlet pressure is recorded on
pressure gauge.
5. If minimum rate pressure needs adjustment, use a
5mm wrench to turn adjustment screw for
minimum pressure setting (clockwise to increase
or counter-clockwise to decrease pressure), while
securely holding the 8mm wrench in place on the
maximum pressure adjustmet nut, until the
desired minimum outlet pressure of 0.35" W.C.
(0.87mbar) is obtained.
6. Check if main burner lights easily and reliably at
minimum pressure.
7. Reconnect pressure feedback connection (if
applicable).
8. Close pressure tap screw.
Flexible Gas Hose Installation
Gas Burner Assembly