Allmand Brothers MH1000 IDF - Manual (Page 13)

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NOTE: DO NOT TAMPER WITH UNIT. HAVE A
COMPETENT SERVICEMAN MAKE ANY ADJUST-
MENTS.
NOTE: Before moving guards out of position insure
power cord is disconnected.
SAFETY WARNING!
FAN COULD CYCLE ON AUTOMATICALLY
High Limit Switch:
The limit switch should be checked every heating
season to insure the burner will shut down if temper-
ature exceeds 200 ° F
*This can be done by restricting the air flow
through the unit. After tests are complete, re-
move
restrictors as ducts must be open for proper
operation.
Fan Switch:
The adjustable fan switch will turn on the fan when
the heat exchanger temperature is at 90
0 F and off at
60 0 F. If the fan fails to stop when the heat exchanger
has cooled, replace switch.
Fuel Filter:
Replace element at least every six months of normal
usage, or more frequently in dirty conditions.
Flame Detector:
The flame detector is located in the burner housing
below the transformer. Periodically clean cell detec-
tor face with
a soft nonabrasive cloth.
Burner:
The electrode spacing must be checked and adjust-
ed, if necessary, after every nozzle change. Nozzles
should be replaced annually or sooner if burner
cannot be set up to operate properly. Nozzle size is
dependent on altitude of operation. Nozzle size and
type are marked on the rating plate.
Motors:
No lubrication is necessary since the bearings are
the sealed type.
Fuel System:
Do not store unit containing fuel oil for long periods.
MAINTENANCE AND TOWING INSTRUCTIONS
NOTE: Service intervals have been estab-
lished for operation under normal conditions.
Where equipment is operated under severe
conditions(very dusty, extreme cold, etc.) af-
fected items should be serviced more frequently.
For detailed information see the Engine Instruc-
tion Manual for Heater Unit Installation-Operating
Maintenance instructions.
CLEANING PROCEDURE
The unit should be cleaned periodically as follows:
1. Remove front cap.
2.
Remove cover panel (jacket to front).
3. Remove fan thermostat cover on outer jacket
(on the nearest burner). Loosen the ther mostat
and remove from the jacket. Remove high limit
thermostat.
4. Slide heat exchanger out of jacket and place
front face down on floor.
5. Access for combustion chamber and heat
exchanger cleaning is obtained through the
burner head opening and by removing the heat
exchanger cap ring(s).
TOWING INSTRUCTIONS
Before towing the Maxi-Heat, the trailer should
be inspected visually to assure that the following
operations have been completed:
1. Hitch is securely attached to towing vehicle
(safety chain secured).
2. Front jack retracted.
3. Ducting removed from heaters and stored.
4. Doors are closed and secure.
5. Check for adequate tire pressure.
6. Taillights are connected and operating.
7. Remove ground rod from earth and secure in
trailer.