E12
Operating Instructions and Owner’s Manual
Mr. Heater Gas Fired Infrared Workshop Heater
CHAPTER 4
OPERATING MAINTENANCE
INSTRUCTIONS
1. TROUBLESHOOTING
A. Table 4 lists the common malfunctions which you
may find during the operation or maintenance of
your heater.
B. In the event results cannot be obtained after
performing all listed solutions, call the factory.
2. ADJUSTING THE PILOT FLAME
The pilot flame should envelop 3/8 to 1/2 in. (10 to 13
mm) of the tip of the thermocouple or generator. Refer
to Figure 11. To adjust:
A. Remove pilot adjustment cover screw. Refer to
Figure 12.
B.
Turn inner adjustment screw clockwise
to
decrease or counterclockwise
to increase pilot
flame.
C. Always replace cover screw after adjustment and
tighten firmly to ensure proper operation.
3. REPLACING THE GAS VALVE UNIT
A. Remove the two gas valve unit wires at the gas
control valve labeled “PP”.
B. Unscrew gas valve from gas piping.
C. Reconnect gas valve and unit wires to terminals
“PP”. Be sure to leave thermostat wire on one
terminal.
3/8 TO 1/2 INCH
(10-13 MILLIMETERS)
THERMOCOUPLE
PROPER FLAME
ADJUSTMENT
Figure 11. Proper Flame Adjustment
MANUAL GAS
CONTROL KNOB
WRENCH
BOSS
GAS
INLET
PILOTSTAT
POWER UNIT
PRESSURE REGULATOR ADJUSTMENT
(BENEATH COVER SCREW)
PILOT FLOW ADJUSTING SCREW
(BENEATH COVER SCREW)
INSTALL LONG
SCREW IN
OUTSIDE CORNER
PILOT GAS OUTLET
(PRESSURE TAPPING
DIRECTLY BENEATH)
STANDARD
PRESSURE
REGULATOR
(“A” MODEL)
STEP OPENING REGULATOR
(“C” MODEL)
Figure 12. Top view of Standard Capacity Gas Control
