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Mr. Heater | MH14TC Gas-Fired Infra-Red Portable Heater
Operating Instructions and Owner’s Manual
I. After heater shutdown, a five minute complete shutoff
period is required before heater is relighted.
7. sHutdOwn and stOrage
instructiOns
A. The bulk propane tank “On-Off” valve should ALWAYS
be completely turned “OFF” when the heater is not in
use.
B. When shutting off the heater, turn the regulator knob
on the heater to “OFF” (clockwise). (See Fig. 3 & 5)
C. CAUTION: After turning unit off, heater will remain
extremely hot. Allow at least 15 minutes for cooling
before handling and storing. Detach heater from bulk
tank before handling and storage. REMEMBER – POL
fitting is a left-hand thread.
D. HEATER STORAGE: Always remove heater from the
propane cylinder when heater is to be stored indoors.
Carefully remove POL Nut from propane cylinder
after turning off LP gas supply at the LP gas cylinder.
Loosen POL Nut with 7/8” open-end wrench by turning
clockwise (remember this is a left-hand threaded
connection). The heater must be disconnected and the
cylinder removed from the heater by loosening the collar
mounting locking handle – see Fig. 3. Cylinder (s) is to
be stored in accordance with Chapter 5 of the Standard
for the Storage and Handling of Liquefied Petroleum
Gases, ANSI / NFPA 58, latest edition. Always store
propane cylinders in a cool, well ventilated place away
from any flame or heat and in a location not used for
habitation. DO NOT STORE PROPANE TANK WITHIN 60
FT. OF OPEN FLAME OR HEAT.
E. See Fig. 6 for spare parts list.
8. cleaning
Clean heater at least annually. Clean heater more often
in dusty environments, as need arises.
1. Remove orifice from heater – see parts list for location
and orientation – Fig. 6
1.1 – Loosen thermocouple (2) from reflector (12) and
remove thermocouple (2).
1.2 – Loosen locknut (11) and remove plenum assembly
from safety shutoff valve (1).
1.3 – Remove orifice (15) from safety shutoff valve (1)
and clean opening in orifice with #77 drill bit or
use a wire with a maximum diameter of .016 in.
Do not place #77 drill bit in a power drill for orifice
cleaning. If compressed air is available, direct
air stream (80 PSI) through orifice. Do not clean
orifice while orifice is attached to safety shutoff
valve.
1.4 – If compressed air is available, direct air stream
through venturi (8) so that dust collected on grid
screen (3) will be blown outward. Keep face away
from grid surface.
1.5 – In event compressed air is not available, clean
grid surface (3) with a stiff brush then gently tap
reflector (12) against a stiff surface to dislodge
dust from grid surface. Do not remove grid screen
(3) from assembly for cleaning. Tap venturi tube
gently with venturi tube pointing down to dislodge
dust inside venturi tube.
1.6 – Reassemble heater in reverse order to removal.
