Midco RE32 - Manual (Page 7)

manifold gas pressure of 2.0" W.C. If pressure adjustment is
required for setting capacity, remove regulator cap for access
to slotted adjustment screw. Turning of adjustment screw
counterclockwise reduces pressure; clockwise increases
pressure. Do not adjust past point where no change in
pressure is noted.
NOTE: Pressure setting must be made with burner running
and main gas ON.
CAUTION: If gas supply pressure is below its
specified range during regulator adjustment, an overfire
condition could result when pressure returns to normal,
particularly if the regulator adjustment screw is bottomed
out.
ALWAYS confirm that at least the minimum rated gas pressure
is being supplied to the burner during regulator adjustments,
and NEVER bottom out regulator screw.
■ The tap for manifold gas pressure measurement is located
in the Burner Inlet Block (see Figure 7 or 8). Remove plug for
access.
■ If the gas pressure regulator fails to maintain a constant
manifold gas pressure within + 0.1" W.C., and it is confirmed
that the inlet gas pressure to the combination valve is 14.0"
W.C. maximum during standby, and 4.0" W.C. minimum with
the main flame on, the regulator portion of the valve is
defective and entire valve must be replaced.
■ If, on a call for heat, the main flame ignition does not occur
even though the pilot is burning, failure of the electric main
valve operator may be indicated. Refer to the trouble chart for
further information.
WARNING: If PROPANE gas is used and the burner is located in a basement, crawl space or confining space, contact your gas
supplier about installing a GAS LEAK warning device. PROPANE gas is heavier than air and can settle in low areas or confined spaces.
This would create a danger of explosion or fire. If you suspect a gas leak, follow instructions on front cover of this manual.
CONSUMER INSTRUCTIONS
MAINTENANCE
■ Keep the area around the burner clear and free of combustible
materials, gasoline or other flammable liquids or vapors. Do not
obstruct burner air openings or ventilation grilles for combustion air.
■ The motor features permanently lubricated ball bearings and
requires no routine oiling maintenance.
IMPORTANT: Check the burner flame periodically. A proper
NATURAL gas flame will appear blue at the burner face with orange
and yellow tips. A proper PROPANE gas flame will appear blue at the
burner face with yellow tips. If the flame is too rich, it will appear billowy
and yellow with hazy tips. If too lean, it will appear short and all blue.
If the flame does not appear proper, CONTACT A QUALIFIED
SERVICE TECHNICIAN FOR CLEANING AND/OR READJUSTMENT.
WARNING: If any flame is observed when the burner
is on standby, or if the ignition spark or valve operator is
heard to come on before the motor reaches operating
speed, immediately turn off the manual gas control and
burner power. A dangerous condition has developed and
must be corrected. CONTACT A QUALIFIED SERVICE
TECHNICIAN FOR READJUSTMENT OR REPAIR .
SET OPERATING CONTROL TO OFF OR THERMOSTAT BELOW
ROOM TEMPERATURE.
TURN MANUAL GAS COCK KNOB ON COMBINATION VALVE TO ON.
TURN BURNER POWER ON.
SET OPERATING CONTROL TO ON OR THERMOSTAT TO CALL FOR
HEAT.IF THE PILOT FLAME IS NOT PROVEN WITHIN 90 SECONDS,
OR IF THE PROOF OF FLAME IS LOST DURING BURNER RUN AND
THE PILOT IS NOT RE-ESTABLISHED WITHIN 90 SECONDS, THE
CONTROL WILL SHUT OFF COMBINATION VALVE AND LOCK OUT.
TO RESET FOR RESTART, DE-ENERGIZE THE CONTROL BY
SETTING THE OPERATING CONTROL TO OFF OR THERMOSTAT
BELOW ROOM TEMPERATURE FOR AT LEAST 60 SECONDS.
REPEAT STEP 4 FOR RESTART.
TO SHUT OFF
TURN MANUAL GAS COCK KNOB ON COMBINATION VALVE TO OFF.
TURN BURNER POWER OFF.
SHOULD OVERHEATING OF THE GAS UTILIZATION EQUIPMENT
OCCUR:
-7-
LIGHTING INSTRUCTIONS
FIGURE 8 Drawer Assembly
1.
2.
3.
4.
5.
6.
1.
2.
1.
2.
CAUTION: If the combination valve has been moved
or replaced, soap bubble test for leaks with the burner
running.
■ If leakage through the valve occurs, as evidenced by
presence of pilot and/or main flame on standby, the entire
valve must be replaced.
XII ELECTRONIC CONTROL SYSTEM
The Electronic Control is a solid state device that automatically
ignites and monitors the pilot flame. It has an integral high
voltage transformer and upon a call for heat, applies high
voltage to the spark electrode and 24 volts to the pilot valve.
When the pilot flame is established and proven, the control
powers the main automatic valve.
■ If the pilot flame is not proven within 90 seconds, or if the
proof of flame is lost during the burner run and the pilot is not
re-established within 90 seconds, the control will shut off the
combination valve and lock out. To reset the control for
restart, de-energize the control by setting the operating control
to OFF or thermostat below room temperature for at least 60
seconds.
■ If the Electronic Control is changed, the replacement must
be identical to the make and model number, or must be an
authorized substitute.
WARNING: EXPLOSION HAZARD. CAN CAUSE
SERIOUS INJURY OR DEATH. THIS DEVICE CAN
MALFUNCTION IF IT GETS WET. NEVER TRY TO USE A
DEVICE THAT HAS BEEN WET - REPLACE IT.