Mr. Heater MH9B - Manual (Page 6)

6 Mr. Heater | Portable Buddy Operating Instructions and Owner’s Manual
calibrated ruby that controls the gas flow.
9 Apply air pressure (max. 30 psi.) into ceramic tile of
burner assembly and the venturi tube (with cone on
end, ref. item #21) to remove dust, lint or spider webs.
10 Make sure the burner tile assembly is completely seated
against the reflector.
11 Carefully slide burner assembly back into casing assem-
bly making sure to center reflector flange with the
casing opening and hold in place while installing burner
assembly screw in the bottom of the heater.
12 Install wire guard by gently bending and inserting into
the (4) holes in the front cover.
TROUBLESHOOTING INFORMATION:
If Spark electrode does not produce spark.
C H E C K
• Spark electrode broken – replace.
• Igniter wire may not be attached to spark
electrode, ground wire may not be attached
to frame - attach.
• Igniter wire damaged – replace.
• Piezo igniter defective – replace.
If Spark electrode produces spark but pilot does not light.
C H E C K
• No gas to heater – install disposable
cylinder or connect hose and turn on valve
at remote cylinder.
• “PILOT” position not properly aligned – turn
gas control knob to “PILOT” position and
depress.
• Pilot is blocked from spider web or dirt –
clean pilot, see MAINTENANCE.
If Pilot flame does not stay lit when knob is released.
C H E C K
• Control knob in “PILOT” position not
completely depressed or held in long
enough to purge air from lines.
• Pilot flame not surrounding thermocouple –
clean pilot, see MAINTENANCE.
• Pilot Assembly defective – replace.
• Tip switch wires disconnected – connect.
If Main burner does not ignite.
C H E C K
• Main burner orifice is blocked – clean
burner, see MAINTENANCE.
If Heater keeps shutting “OFF” during normal operation.
C H E C K
• Pilot is blocked – clean pilot, see
MAINTENANCE.
• Provide minimum fresh air opening of 9
square inches (example 3” x 3” opening).
• Tip over switch activated from bumping
heater. Re-light
PARTS LIST:
SEE BACK PAGE FOR PARTS ORDERING INFORMATION
REF. # ITEM # DESCRIPTION
1 ............. 73234 ......... PIEZO IGNITER
2 ............. 73236 ......... WIRE, IGNITER
3 ............. 73237 ......... WIRE, GROUND
4 ............. 73405 ......... COVER, RH PLASTIC
5 ............. 73418 ......... KNOB, FUEL CONTROL
6 ............. 73423 ......... COVER, FRONT
7 ............. 73424 ......... COVER, REAR
8 ............. 73426 ......... COVER, LH PLASTIC
9 ............. 73428 ......... (2) BASE SUPPORT TUBES
10 ........... 73449P ....... GUARD, WIRE
11 ........... 73452 ......... HANDLE TUBE
12 ........... 98959 ......... SCREW, BURNER MT.
13 ........... 11409 ......... REGULATOR
14 ........... 73432 ......... OWNER’S MANUAL
(Required when ordering parts.)
15 ........... 73416 ......... CONTROL VALVE
17 ........... 73499 ......... PILOT ODS / TIP SWITCH ASSEMBLY
18 ........... 73413 ......... ORIFICE, BURNER
19 ........... 71113 ......... O-RING, BURNER ORIFICE
20 ........... 73446 ......... COMPLETE BURNER ASSEMBLY
(Includes assembled items 21- 25)
21 ........... 73458 ......... PLENUM, BURNER
22 ........... 73429 ......... (2) CLIP, BUNER TILE
23 ........... 73433 ......... GASKET, BURNER TILE
24 ........... 73439 ......... BURNER TILE
25 ........... 73460 ......... REFLECTOR, BURNER
26 ........... 73422 ......... REGULATOR HOLD DOWN
ACCESSORIES:
ITEM # DESCRIPTION
F273701 5 ft. PROPANE HOSE ASSEMBLY (Swivel
1”-20Male Throwaway Cyl. Thd. X P.O.L. w/
Handwheel)
F273702 12 ft. PROPANE HOSE ASSEMBLY
(Swivel 1”-20Male Throwaway Cyl. Thd. X
P.O.L. w/Handwheel)
F272702 12 ft. PROPANE HOSE ASSEMBLY
(Swivel 1”-20Male Throwaway Cyl. Thd. X
P.O.L. w/Handwheel)
F273699 Fuel Filter (Replace Annually)