Mr. Heater MH125LP - Manuel (Page 4)

For Model 125NG (for use with natural gas)
Piping must be clean and free from scale or burrs.
Install regulator supplied with heater. Connect with 1/2”
NPT nipple (not included) to Control Valve.
Connect the appliance to an appropriately designed and
installed fuel supply system. This system must include an
approved manual shut-off valve which is readily accessible
and is located within six (6) feet of the appliance.
Additionally, a sediment trap or drip leg must be located
upstream of this manual shut-off valve. Refer to the
appropriate (natural gas) installation code noted above. If a
flexible connector is used, it must be of an approved type.
Before attempting to ignite the appliance, all gas fittings and
connections must be thoroughly checked for gas leaks. Apply a
small amount of a mild soap and water solution to all fittings
and connections and observe for escaping bubbles. If any leaks
are detected, shut off the gas supply to the appliance
immediately. Wait a minimum of five minutes, repair the leak(s)
and retest for leakage. Dry all fittings and connections after leak
testing.
WARNING
NEVER USE A FLAME FOR GAS LEAK
TESTING.
OPERATING INSTRUCTIONS
WARNING
IF YOU DO NOT FOLLOW THESE
INSTRUCTIONS EXACTLY, A FIRE OR
EXPLOSION MAY RESULT CAUSING
PROPERTY DAMAGE, PERSONAL INJURY, OR
LOSS OF LIFE.
CAUTION
THIS APPLIANCE IS HOT DURING NORMAL
OPERATION, AVOID PHYSICAL CONTACT.
CAUTION
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.
LIGHTING AND SHUT DOWN
Lighting the Heater
1 Before attempting the light the heater, smell all around
the heater area for gas. Be sure to smell next to the
floor because LP Gas is heavier than air and will settle
on the floor. Turn on the gas supply to the appliance
and check all fittings and connections for gas leaks
using a mild soap and water solution. NEVER use a
match to check for gas leaks. Should a gas leak
occur, shut off the gas supply to the appliance
immediately. Wait a minimum of five minutes before
repairing the leak.
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 Wait a sufficient length of time (at least five minutes)
to allow gas which may have accumulated in burner
compartment to escape.
5 Turn on the main gas supply.
6 Turn the gas valve knob counter-clockwise to the
“PILOT” position (see Fig. 1).
7a 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.
Depress red spark ignition button to light pilot flame
(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 “Hi” position to light burner. or...
7b 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.”
4 Operating Instructions and Owner’s Manual Enerco Group, Inc. | Gas-Fired Infra-Red Portable Construction Heater