Mr. Heater mh125 用户指南

IF YOU DO NOT FOLLOW THESE INSTRUCTIONS 
EXACTLY, A FIRE OR EXPLOSION MAY RESULT 
CAUSING PROPERTY DAMAGE, PERSONAL 
INJURY, OR LOSS OF LIFE.

THIS APPLIANCE IS HOT DURING NORMAL 
OPERATION, AVOID PHYSICAL CONTACT.

DO NOT PLACE CLOTHING OR OTHER 
COMBUSTIBLE MATERIALS ON THIS APPLIANCE.

DO NOT operate this heater if any part has been under 
water. Call a qualified service technician to inspect the appliance 
and to replace any part of the control system or gas control valve 
which has been under water.

This appliance must be installed and operated only in locations 
where the potential for physical damage to the appliance is 
reduced to a minimum. The owner/operator of this appliance 
must ensure that precautions are taken to protect the appliance 
from physical damage.

1 

Before attempting to light the heater, smell all around 
the heater area for gas. Be sure to smell next to the ¯oor 
because LP Gas is heavier than air and will settle on the 

soap and water solution. 

for gas leaks. Should a gas leak occur, shut off the gas 
supply to the appliance immediately. Wait a minimum of 

2 

Use only the fuel intended for this appliance. Check the 
appliance rating plate for the correct   fuel information.

3 

Turn the gas valve knob clockwise to the “OFF” position. 
See Fig. 1 and Fig. 2 for location of appliance parts.

4 

to allow gas which may have accumulated in burner 
compartment to escape.

5 

Turn on the main gas supply.

6a  Depress and turn Control Knob counterclockwise to 

“Pilot” position and hold for 1-2 minutes. This may take 
longer to purge air from the supply hose depending on 
the length of the hose being used.

 

(repeat until pilot lights) and continue to hold Control 
Knob at “Pilot” positionfor 30-60 seconds to enable Pilot 
Light Safety System.

 

Fully turn Control Knob to “ON” position to light burner. 
or...

6b  To light the pilot, move the lighting hole cover aside 

(see Fig. 1) and place a lighted match into the hole. 
Depress the gas valve knob and hold while lighting 
and observing the pilot burner. Ensure that the pilot 
burner ignites from the match. Allow the pilot to burn 
approximately 30 seconds before releasing the gas valve 
knob. If pilot does not remain lighted, repeat the lighting 
operation allowing a longer period of time before 
releasing the gas valve knob.

NOTE: In cases where long runs of gas supply lines have been 
installed ahead of the appliance, it may be necessary to bleed 
trapped air out of the supply lines before lighting the pilot. 
New installations generally require bleed of supply lines. Wait 
a minimum of five minutes after bleeding the supply lines 
before attempting to light the heater.

Adjust pilot if necessary as noted under “Pilot Burner 
Adjustment.”

7.  Turn the gas valve knob counter-clockwise to the “ON” 

position (see Fig. 1). The burner will light. 

8. 

IMPORTANT: DO NOT attempt to adjust the main 
burner input using the main gas supply valve, for 
this may cause the pilot and thermocouple to shut down 
the burner (Fig. 2).

To turn the heater OFF,

• 

For short periods of time, turn the main burner off by 
rotating the gas valve knob clockwise to the “PILOT” 
position.

• 

For extended periods of non use, turn the appliance 
completely off by rotating the gas valve knob clockwise 
to the “PILOT” position, depress the knob slightly, then 
rotate the knob fully clockwise to the “OFF” position. 
(Note: For Model 120L, also turn off the gas supply 
cylinder.)

1.  Remove the pilot adjustment cap. The pilot adjustment 

cap is a slotted screw located in front of  the “Pilot” 
designation stamped on top of valve body just below the 
gas valve knob.

2. 

Rotate the key “clockwise” to decrease or “counter-

3.  Replace the pilot adjustment cap.

Operating Instructions and Owner’s Manual

Enerco Group, Inc. | Gas-Fired Infra-Red Portable Construction Heater