Heater Operating Instructions; Startup - Mr. Heater GAS FIRED INFRA-RED WORKSHOP HEATER MH25LP / MH25NG Operation And Owner's Manual

CHAPTER III
HEATER OPERATING
INSTRUCTIONS
1. OPERATING SAFETY INSTRUCTIONS
WARNING: When used without fresh air, heater may
give off CARBON MONOXIDE, an odorless poison-
ous gas. OPEN WINDOW AN INCH OR TWO FOR
FRESH AIR WHEN USING HEATER.
WARNING: This heater is equipped with a PILOT
LIGHT SAFETY SYSTEM. DO NOT TAMPER WITH
PILOT LIGHT SAFETY SYSTEM.
WARNING: If heater shuts off, do not relight until you
provide fresh air. Open door for 5 minutes. If heater
keeps shutting off, have it serviced. Keep burner and
control clean.
WARNING: CARBON MONOXIDE POISONING MAY
LEAD TO DEATH. Early signs of carbon monoxide
poisoning resemble the flu with headache, dizziness
and/or nausea. If you have these signs, heater may
not be working properly. Get fresh air at once! Have
heater serviced.
WARNING: DO NOT USE MATCH OR OTHER
FLAME FOR LEAK TESTING.
CAUTION: If the infra-red color of the grid becomes
dull when the building furnace is operating, consult
gas supplier on correct gas supply piping sizes.
CAUTION: This heater is for indoor installation only!
MANUAL GAS
CONTROL KNOB
WRENCH
BOSS
INLET
Model # MH25NG/LP
GAS
Figure 9. Gas Valve Components
HS25NG/LP
Gasket binder material used in this heater assembly
will temporarily emit an odor and/or vapor. This condi-
tion will clear up in approximately 20 minutes and
thereafter will not reoccur. Refer to Chapter 2 for
ventilation.
2. HEATER STARTUP
WARNING: During heater startup ensure that
building is well ventilated.
A. Open the gas supply valve or valves.
B. Set the thermostat to the OFF position.
See Figure 8.
FIGURE 8. THERMOSTAT CONTROLS
C. If the manual gas control knob on the gas valve is
not in the OFF position, partially depress the knob
and rotate to the OFF position. See Figure 9.
PRESSURE
REGULATOR
ADJUSTMENT
PILOT FLOW ADJUSTING SCREW
PILOTSTAT
(BENEATH COVER SCREW)
POWER UNIT
10
Installation instructions and Owner's Manual
NOTE
STANDARD
PRESSURE
REGULATOR
PILOT GAS OUTLET
(PRESSURE TAPPING
DIRECTLY BENEATH)