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Mr. Heater | MH26TC Gas-Fired Infra-Red Portable Heater
Operating Instructions and Owner’s Manual
POL Nut with 7/8” open-end wrench by turning clock-
wise (remember this is a left-hand threaded connection).
The heater must be disconnected and the cylinder re-
moved 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 Stor-
age 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. 5 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. 5.
1.1 - Loosen thermocouple (2) from reflector (7) and
remove thermocouple (2).
1.2 - Remove hose assembly (11) from safety shutoff
valves (12). Remove safety shutoff valves (12) from
plenum assembly (3). Do not dismantle plenum (3)
from reflector (7).
1.3 - Remove orifice (12) 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 (3) so that dust collected on grid
screen (4) will be blown outward. Keep face away
from grid surface. Repeat for each venturi.
1.5 - In event compressed air is not available, clean grid
surface (4) with a stiff brush then gently tap reflec-
tor (7) against a stiff surface to dislodge dust from
grid surface. Do not remove grid screen (4) from
assembly for cleaning. Tap venture tube gently with
venturi tube pointing down to dislodge dust inside
venturi tube.
1.6 - Reassemble heater in reverse order to removal.
tHis cOluMn intentiOnallY
leFt BlanK
