Desa M65E Construction Heaters Operating and Service Manual

 Le C | | 1 | | ``
PORTABLE HEATERS
MODEL
— M-65E
Spec. No. 311 3G10
OPERATING, MAINTENANCE and SERVICE
INSTRUCTIONS with PARTS LIST -
Koehring
“| Master Division
Operating and service manual | a | - | | Ш Section
| * > | | Introduction
SECTION I
INTRODUCTION
A. GENERAL | ingair lifts fuel from the tank by a siphon a action, and
ВЕ 5 a. forces it into the combustion chamber i in a fine spray.
1. Purpose of heater. Use this heater wherever | |
you need temporary portable heat. It must be used -2. Ignition System. The electric arc of a spark
with adequate ventilation and proper electrical power. plug that fires constantly while the heater is in oper-
SE o : С ation ignites the mixture of fuel and air. |
2. Purpose of manual. This Service Manual gives | - |
complete instructions for operating, maintaining, 3. Air System. Afanonthe other end of the motor
trouble shooting, and servicing the heater. A com- shaft supplies additional air to the heater. Part of
plete parts list is included at the end of the manual. this air enters the burner through ports around its
outer edge, and helps complete the combustion of the
B. PRINCIPLES OF OPERATION - — burning fuel-air mixture.
Operation of the heater is easy to understand. It The rest of the air from the fan passes over and
consists of three simple systems. (See Figure 1.) around the combustion chamber. Aft the front of the
heater it mixes with the hot air coming from inside
1. Fuel System. An air pump on one end of the the combustion chamber. The air then flows out of
motor shaft forces air through the nozzle. The mov- the heater as a jet of clean, heated air.
| OUTPUT AIR FILTER — | - AIR PUMP |
INTAKE AIR FILTER
SPARK PLUG— | |
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Figure 1. Flow Diagram |
A0324-01
C. SPECIFICATIONS
Rating . ............. 63, 000 BTU per hour Air Pump ............ Four-blade dry type
Fuel ................ Kerosene or No. 1
fuel oil only Amperage ........... 4, during normal run
Power Requirements .. 230 volts, 50 cycles , AC Duct ................ None recommended
Motor ........... 2850 RPM on heaters built
ight ................ . .
(Totally enclosed) for 230 volt 50-cycle AC Weigh 38 lbs. , approx
Fan ............ Six blades, 6-5/8 in. dia- Fuel tank capacity ........ 4.5 U.S. gallons
meter, pitched to give re-
quired CFM at rated motor Fuel Consumption ....... Average 0.44 U.S.
RPM gallons per hour
A2813-00 ВЕ -2- 5/71
>
“Tr
SECTION ll
OPERATION
A. OPERATING CAUTIONS
1. Usetheheater in a well-ventilated area only.
A partly-opened door or window near the heater will
give enough ventilation. We do not recommend the use
of this heater as the primary source of heat in sleep-
ing quarters.
| 2. Use ONLY kerosene or No. 1 fuel oil. DO
(NOT USE GASOLINE, AS IT IS VOLATILE AND
DANGEROUS. Do not use No. 2 or No. 3 fuel oil, as
they contain tars which will contaminate the heater.
3. Usetheheater only on the specified electrical
ower. This is given on the heater instruction plate.
4. Plug the heater intoa grounded receptacle, or
juse a grounding adapter. Be sure the heater is ground-
ed whenever it is in operation and whenever you are
working on it.
5. Keeptheheater at least 4 feet from any com-
bustible material.
6. Donotuse the heater in the presence of flam-
mable vapors like those from paint or gasoline.
7. Do not add fuel while the heater is operating.
WARNING
The motor has an automatic thermal
overload protector. It may stop due to
low voltage or overload, then RESTART
automatically. Be sure to disconnect the
heater before inspecting the motor.
B. EXTENSION CORD SIZES
Be sure to use an extension of the proper size to
assure adequate voltage at the heater.
Length of Cord (feet) 100 200 300 400 500
Wire Size (AWG) 14 12 10 8 6
C. FUEL
Be sure the tankis clean. Fill it with kerosene or
No. 1 fuel oil only. Do not use any other fuel.
When the heater is operated at extremely low temp-
eratures (beyond 10°F below zero), the fuel may con-
geal. Topreventthis, adda non-toxic anti-icer to the
A2814-00
fuel. Follow the mixing instructions contained on the
anti-icer container.
D. STARTING
To start the heater, plug the cord into an outlet
that will give power of the same voltage and fre-
quency as the instruction plate. The heater will start
immediately and operate continuously.
E. STOPPING
To stop the heater unplug the heater cord from the
outlet.
5/71
SECTION Il!
MAINTENANCE
Maintenance consists of simple operations which
the user of the heater can perform to keep the heater
running and ingood condition. See Figure 3 for main-
tenance points. I ordinary maintenance fails to re-
turn a heater to good operating condition, refer to
Section IV in this manual for checking and trouble
shooting.
A. FUEL TANK MAINTENANCE
Drain the fuel tank after every 150 hours of oper-
ation, and flush itout with cleanfuel. Refill with clean
new fuel.
B. INTAKE AIR FILTER MAINTENANCE
1. Checkand clean the intake air filter often. It
needs cleaning if you can see a film of dust on the fil-
ter element. To check or clean, remove the screw
which attaches the filter cover to the heater housing.
2. Pull out the filter element and wash it with a
mild detergent and hot or cold water. Dry thoroughly
and replace. Install the cover and the screw.
CAUTION: Do not oil the filter element.
C. REMOVING HEATER HOUSING
The heater housing will have to be removed to
perform the following maintenance.
Remove the two screws (one on each end of the
handle) to detach the housing from the fan guard and
end cap and nose cone assembly.
NOTE: The heater will not operate properly if
the housing is not in place.
GASKET
(4) OUTPUT
AIR FILTER
ELEMENT
(%) FUEL FILTER
FUEL FILTER
GROMMET ——
. MOTOR STARTING RELAY
EDGE OF FUEL TANK SKIRT—
(3) FAN
Ä FAN GUARD
К
7 FUEL TANK
FILLER CAP
< S
(%) AIR FILTER ASSEMBLY NK
(3) INTAKE AIR FILTER ELEMENT S
DST CORD
INTAKE AIR FILTER
COVER
HOUSING
HOLDING CLIP
—— OUTPUT AIR FILTER
HOUSING
— 6) SPARK PLUG
MOTOR
SPARK PLUG WIRE
HEATER SERVICE
Figure 2. Maintenance Points
(*Indicates parts recommended as replaceable by owner or user of heater.)
A2803-00
5/71
» *
D. OUTPUT AIR FILTER MAINTENANCE
1. Checktheoutputair filter after every 150 hours
of operation, or at least twice every heating season.
2. Foraccesstotheoutputair filter, remove two
screws attaching the valve body to the burner head
body. Lift off the valve body and gasket, then lift out
the output air filter element and the lint filter.
3. Wash the filter element and the lint filter in
hot or cold water with a mild detergent. Dry thoroughly.
Do not oil either filter. Be sure the gasket is tight
when replacing the valve body.
NOTE: Cleaning the output air filter may cause a
change in air pump output pressure. If the heater
burns improperly after cleaning, check the air
pump output pressure.
E. SPARK PLUG MAINTENANCE
~ WARNING
Be sure the heater is not plugged in. The
spark plug wire carries high voltage when the
heater operates.
1. Disconnect the spark plug wire.
2. Remove the spark plug from the burner
head and check the gap between the electrodes. The
gap mustbe within the limits given in Figure 3. This
is about the thickness of a dime.
3. Adjustthe gap by bending the outside electrode.
4. Reinstall the spark plug if no further mainte-
nance is needed for the burner head. If you do not re-
install the spark plug at this time, protect it from
damage.
BEND HERE FOR PROPER
GAP SETTING
T Sm |
0.045—0.055 IN. GAP ;
(USE A DIME AS A THICKNESS GAGE)
Figure 3. Spark Plug Gap Setting
F. MOTOR LUBRICATION
1. Theball bearing onthe pump-end of the motor
is lubricated for the life of the motor. Do not lubri-
cate.
2. ОН the sleeve bearing at the fan-end of the
motor once every heating season with a few drops of
SAE 30 automotive engine oil, Arctic C, or electric
motor oil. Do not over-oil.
G. FAN MAINTENANCE
1. Cleanthefan blades every 500 hours of oper-
ation, or whenever you see that they are getting dirty.
A build-up of dirt will reduce the air supply and cause
A2804-00
faulty operation.
fan for cleaning.
Remove the fan guard to reach the
2. Wipe the blades clean with a cloth moistened
with kerosene or solvent. Be careful not to bend the
blades. Dry the fan thoroughly.
3. Reinstall the fan guard if the motor, pump and
burner head assembly is not going to be removed at
this time.
H. DISASSEMBLY
NOTE: It will be necessary to remove the com-
bustion chamber and the burner, pump and motor
assembly in order to reach the fuel filter for
maintenance.
1. Remove thewire nuts and disconnectthe wires.
2. To remove combustion chamber, take off the
end cap and nose cone assembly, then loosen the screw
that holds it to the burner head. You can reach this
screw by inserting a screwdriver into the hole near the
rear of the left side of the combustion chamber. As
you face the outlet of the heater, rotate the combustion
chamber to the left (counterclockwise) to release it
from the burner. Pull it out through the end cap.
3. Remove the motor starting relay from its
bracket at the left side of the heater. Loosen the air
filter and starting relay bracket. Disconnect the air
intake tube from the pump. Remove the motor clamps.
Loosen the fan guard. |
4. Disconnect three motor leads. Lift out the
assembly of the motor, pump, and burner head.
5. When you reinstall the combustion chamber,
position it so that the drain holes will be at the bottom.
Check to be sure the combustion chamber fits tight
against the face of the burner head. If not, see Sec-
tion V, paragraph L-1-g.
I. FUEL FILTER MAINTENANCE
Remove the filter from the burner head, using a
wrench. Immerse the fuel filter in clean fuel and
rinse several times. Blow it dry through the flared
end. |
When you reinstall the filter, be sure the con-
nector threads and nut are undamaged, then tighten the
nut firmly onto connector in burner head body. The
grommet must be in place in the fuel tank before you
insert the fuel filter tube.
J. REASSEMBLY
Be sure all parts are in place and all screws and
electrical connections are tight before attempting to
use the heater. Take care not to damage the spark
plug and to keep the proper gap between its electrodes.
When installing the heater housing, be sure the
holding clips at the bottom edges are engaged with the
tank skirt.
5/71
Operating and service manual
Section IV
Trouble Shooting
SECTION IV
TROUBLE SHOOTING
A. GENERAL
If normal maintenance fails to keep a heater in
good operating condition, it probably requires service
or replacement of some parts. Examine if for clues
as to why service isnecessary, thentest-fire it to gain
first-hand knowledge of why service might be needed,
This section tells how to examine and test-fire the
heater, It also gives a Trouble Shooting Chart for
help in diagnosing heater troubles and finding the
remedies.
В. EXAMINATION
1, Check the fuel tank for sludge and water. If you
find it, expect to find a dirty nozzle and/or fuel filter.
2. Spin the fan to be sure it turns freely. If it is
stiff, look for a worn or dry bearing on the fan-end of
the motor, or for a binding pump rotor.
3. Check the heater for dirt and foreign materials
around the pump, fan, and filters. Be sure the heater
is clean before test-firing it.
4. Check the heater cord for obvious breaks or un-
safe condition. If the cord is doubtful, repair it or
install a new one before test-firing.
C. TEST FIRING
1. Clean the tank and fill it with at least two
gallons of clean fuel. A minimum of two gallons of
fuel must be in the tank for proper test firing.
2. Clean the air intake > filter, (Section III, para-
graph B).
A0329-00
3. Remove the heater housing and combustion
chamber (Section III, paragraphs C and H)., Discon-
nect the spark plug wire, Take out the plug which is
in the output air filter housing. Install the pressure
gage (listed in Section V, paragraph B) into the hole.
4, Plug the heater cord into an electrical outlet.
The pressure gage must read 4 pounds per square
inch, plus or minus 1/16 pound. If not, adjust the
pressure as described in Section V, paragraph K.
NOTE: It is not possible to test-fire the heater
properly if this adjustment cannot be made,
5. After making the pressure check and adjust-
ments, reinstall the combustion chamber, the plug and
the heater housing. Reconnect the spark plug wire.
6. Allow the heater to run for 15 minutes. Ob-
serve its operation during the test run.
7. If any troubles show up during the test firing,
refer to the Trouble Shooting Chart to find out how
to correct them.
D. TROUBLE SHOOTING
The following chart lists the problems you might
find in a heater. For each problem, there is a list
of “Possible Causes”, The “Remedy” column tells
how to correct the problem, or tells youby means of a
section and paragraph number, where to find in-
structions for correcting it, In trouble shooting,
remember that the air pump is part ofthe fuel system,
because the air it supplies siphons the fuel from the
tank and pushes it through the nozzle.
NOTE: Be sure to follow all cautions and warnings.
They will help you prevent damage tothe heater
or injury to yourself.
Section IV
Operating and Service Manual |
- a = Trouble Shooting
TROUBLE SHOOTING CHART
| FOR FURTHER
PROBLEM POSSIBLE CAUSE REMEDY DETAILS SEE: |
1. Motor does not Electrical Troubles
start. a. No power or low Be sure power is reaching heater; check con-
voltage at heater. dition of heater cord. Repair or replace as
needed.
Use extension cord with wires heavy enough Sec. II,
to carry the electrical load of the heater. Para. B.
Be sure the voltage at the outlet is same as
shown on heater instruction plate.
b. Defective motor Check motor and relay. Sec. V.
or starting relay. Replace a defective motor or starting relay. Para. D.
Mechanical Troubles
c. Dry bearing on fan- | Lubricate motor. If lubrication does not Sec. III,
end of motor. solve problem, check pump. Para. F,
sec. V,
| Para. J.
d. Pump rotor binding |
or carbon blades Rebuild pump. Sec. V,
worn out. Para. J.
e. Fan striking end Check for damaged end shield; repair or
shield due to replace if damaged.
damaged end shield Replace fan if damaged. Sec. V,
or broken motor Para. F
mount support. Check for broken weld on motor mount. ara. ©.
I broken return to dealer for replacing or
re-welding.
2. Heater will not Fuel System Troubles
ignite, but motor a. Fuel tank empty, Check for water in tank, clean tank and fuel
runs. —- . . .
| water in fuel, filter if water is found.
wrong fuel. Till tank with new, clean kerosene or No. 1
fuel oil.
b. Fuel filter Remove and wash in clean fuel. Sec. HI,
clogged. Para. L
c. Nozzle plugged or Clean by blowing compressed air through Sec. V,
defective. nozzle from outlet end of nozzle. Replace Para. I.
nozzle if cleaning does not solve problem. |
d. Low air pump Check pressure; adjust, rebuild or replace Sec. V,
pressure. - air pump as needed. Para. J & K.
Check rubber sleeve around shank of nozzle. Sec. V,
Replace if leaking. Para. I.
Check seal between burner head and air Sec. V,
pump port plate; be sure seal is in place. Para. L.
-7- A0715-00
TROUBLE SHOOTING CHART (Continued)
FOR FURTHER
PROBLEM POSSIBLE CAUSE REMEDY DETAILS SEE:
2. (Continued) d. Low air pump . Check gasket at output air filter cover. Ве
ne No not pressure. sure it is holding pressure. Section III,
5 ’ Be sure air filters are clean. Para. B&D
motor runs.
| Ignition Troubles
e. Defective spark Measure gap between electrodes, using Sec. III,
plug. (Wrong gap, thickness of a dime as a gage. Adjust Para. E.
plug wet with fuel electrode gap.
or electrodes Inspect plug for broken porcelain or
carboned, or plug electrodes. Replace damaged spark plu
damaged.) prac ged spark plug.
f. Spark plug wire dis- Disconnect heater cord!
connected from plug
or from terminal of Check at plug and transformer to be sure
transformer. wire is tight at both ends.
g. Defective trans- Disconnect spark plug wire from trans- Sec. V,
former. | former and check transformer for spark; Para. C.
replace if no spark can be obtained.
3. Heater burns, but | Improper Fuel-Air Mixture (Not enough fuel)
smoke or puffs of a. Heater running out Shut heater off and check fuel tank. I you
smoke can be .
een: heater will of fuel; water con- can see water in the bottom, drain and
seen; hie densation in fuel flush the tank with clean fuel.
not burn steady; tank
heater burns Refill with fresh kerosene or No. 1 fuel oil.
with odor. b. Dirty intake and Remove and clean the air filters. бес. Ш, |
output air filters, Para. B&D
causing reduced air |
flow through nozzle, Be sure air intake passage is not blocked.
resulting in low fuel
flow.
c. Fuel filter loose, Remove and wash fuel filter in clean fuel. Sec. IH,
dirty, or leaky. Para. 1.
| Test filter connection for leaks. Use Sec. III,
a new one if defective. Install Para. I.
tightly in burner head.
d. Dirty nozzle. Remove and clean burner head. Sec. V,
Blow compressed air through nozzle Para. 1.
from outlet end. |
Never use a drill, wire, or other tool to
open nozzle passage. Sec. №,
Replace a defective nozzle. Para. 1.
e. Low pump output Check pump output pressure; adjust Sec. V, В
pressure. (Low pressure; repair pump if adjustment Para. K.
motor speed, worn cannot be made.
я dius tment. | out of Check to see that no dirt or trash (or
) ` dirty fan blades) could cause motor
slowdown.
A2805-00
5/71
TROUBLE SHOOTING CHART (Continued)
FOR FURTHER
PRO LE CA
ROBLEM POSSIBLE CAUSE REMEDY DETAILS SEE:
3. (Continued) e. Low pump output Lubricate fan-end bearing of motor. Sec. III,
Heater burns, but pressure. (Low Para. Е.
smoke or puffs of motor speed,
smoke can be seen; worn pump, pump
heater will not out of adjustment. )
burn steady; f. (Remote possibility) Check for bubbles in fuel tank while heater
heater burns
| Rubber sleeve on is operating.
with odor. . ;
shank of nozzle is If bubbles appear, replace rubber sleeve Sec. V,
leaking. ppear, rep - Para. I.
g. (Remote possibility) Adjust fins for good fit of combustion Sec. V,
Combustion chamber chamber to burner head. Para. L-1g.
not tight against
burner head, allow-
ing too much air to
enter combustion
chamber.
4. Flames come Improper Fuel-Air-Mixture
out front of (Too much fuel, or not enough air for amount of fuel.)
heater. | |
a. Dirty fan, or air Clean the fan. Be sure the air passageway
passageway through through the heater is clean. Keep the
heater blocked by heater clean.
dirt or trash. ‚ N
b. Pump output pres- Check and adjust pump output pressure. Sec. V,
sure too high. Para. K.
c. Fan loose or im- Check; correct if not right. Sec. V,
properly located Para. F.
on shaft.
d. Clips not engaged Check housing fit; correct if not tight.
over tank skirt. |
—5. Heater cycles Electrical System Troubles
intermittently. (Motor overload protector tripping out.)
a. Low voltage, Check power line voltage.
causing trip-out
of motor overload Use correct size extension cord. Sec. II,
protector. Be sure extension cord and heater cord Para. B.
are in good condition, without inter-
mittent open circuits.
b. Motor overload Lubricate fan-end bearing. | Sec. III, Ш
protector tripping | Para. F.
out due to motor Keep motor and fan area clean.
trouble, or bind-
ing pump. Replace defective motor or rebuild Sec. V,
defective pump. Para. E &J.
A2806-00 -9— 5/71
SECTION V
SERVICE AND REPAIR INSTRUCTIONS
A. GENERAL
This section covers replacement of parts, repair
and rebuilding of heater components, and making of
adjustments.
Whenever a part needs to be replaced, you can
identity iton the exploded view, and order the part by
name and part number from the parts list, in Section
VI.
B. SPECIAL TOOLS, EQUIPMENT,
AND
SUPPLIES |
The following tools and equipment should be avail-
able for complete servicing of the heater.
1. Air Pressure Gage, Part No. M9148, or any
gage with a 15-pound pressure range and 1/4-pound
divisions, able to indicate 4-1/4 pounds accurately,
plus fittings for installation into a 1/8-inch standard
pipe-threaded hole.
2. Oil Burner Nozzie
socket wrench.
Wrench, or any 5/8-inch
3. Cleanfuel, either kerosene or No. 1 fuel oil.
4. Non-flammable non-toxic cleaning solvent.
CAUTION: Use cleaning solvents only in a well
ventilated area. Keep away from heat or open
flame. |
5. Compressed air is advisable, but not abso-
lutely necessary.
C. TRANSFORMER
CAUTION: To begin the transformer test, be sure
the heater is NOT plugged in.
1. Remove the spark plug wire from the trans-
~ former output terminal.
WARNING
When testing the transformer, be extremely
careful to avoid contact with the transformer
output terminal. A transformer in good con-
dition produces a high voltage at the output
terminal.
2. Plug the heater cord into an outlet of the
proper voltage and frequency. Place a screwdriver
with a GOOD INSULATED HANDLE across the out-
put terminal and bring the tip of the screwdriver near
a metal part of the heater. If no spark jumps, and
the wiring to the transformer is good, the transfor-
mer is defective and must be replaced. Unplug the
“heater before attempting to replace the transformer.
A2807-00
-10-
3. Be sure the mounting surfaces of the new
transformer are scraped clean, and the mounting
screws are tight, toassure adequate grounding. Con-
nect the spark plug wire and the primary leads. See
the Wiring Diagram, Figure 4.
MOTOR |
TH mace
RELAY
MOTOR ) | MOTOR |M 59
| RED | Lo
GRAY Г une |
| BLACK,
KLIXON
INTERNAL
GROUND BLACK RELAY
H oO e Ph
RED
| . OM
TRANSFORMER a
BLACK A m
— WHITE WIRE
mon 1 je —NUTS— |—
BROWN
- GREEN/YELLOW
BLUE 203
Figure 4. Wiring Diagram
D. CHECKING THE MOTOR AND RELAY
In case the motor fails to start when the heater
is plugged in, check the motor and relay as follows.
1. Spin the fan by hand. Any stiffness indicates
that the fan-end bearing is dry or worn, or that the
pump is binding. If the motor spins freely, make the
following electrical check.
2. Take the black wire from the motor off its.
terminal onthe relay. See the Wiring Diagram, Fig-
ure 4. Plug the heater cord into an outlet of the pro-
per voltage.
CAUTION: Avoid touching the bare wires.
3. Touch the black wire from the motor to the
terminal of the red motor wire, on the relay. The
motor should start. As soon as the motor reaches
operating speed, remove the black wire from con-
tact. The motor should continue to run.
5. If the motor fails to start, or if it fails to
continue running when the black wire is disconnected,
it is defective. Replace it, or return it to a factory-
approved authorized service organization.
5/71
E. MOTOR SERVICE
I the motor requires service, it must be re-
moved from the heater, as described in Section III,
paragraph H.
The alignment of the motor with the air pump is
critical. If any service is to be done on the motor, be
sure not to loosen or remove the pump body, or this
alignment will be disturbed.
Apply a few drops of oil to the fan-end bearing
ofa stiff motor. ff this fails to correct the stiffness,
rebuild the pump as described in paragraph J, of this
section. During rebuilding of the- pump, check again
for stiffness, and if it still exists, rebuild the motor.
NOTE: The motor cannot be repaired by
rewinding the stator. I the electrical
values of the motor are changed by re-
winding, the starting relay will also be
affected.
F. FAN
Replace a damaged or bent fan. Do not attempt
repair, except as a temporary emergency measure.
Loosen two setscrews to free the fan from the motor
shaft.
When checking or replacing the fan, see that the
setscrews are located in the notch in the motor shaft
that is nearest the outer end of the shaft, and that the
hub is toward the end of the shaft.
Be sure the replacement fan has the same blade
pitchas the fan that was removed. This is important
in order to retain the air flow and combustion char-
acteristics of the heater.
G. FURTHER DISASSEMBLY
Remove the combustion chamber, and the group
of parts consisting of the motor, pump, and burner
head, as described in Section III, paragraph H. This
will let you reach the rest of the heater parts for ser-
vice.
H. FUEL FILTER SERVICE
| 1. Remove the fuel filter from the burner head
andcleanit, as described in Section III, paragraph I.
2. When reinstalling the fuel filter, be sure to
tighten the flared nut firmly to prevent air leaks.
A2808-00
—11-
NOTE: If the burner head requires fur-
ther service, lay the filter aside and pro-
tect itfrom damage until final reassembly.
I. CLEANING BURNER AND NOZZLE
1. Remove the burner head by taking out the two
attaching screws. Take out the spark plug to prevent
damage. Remove the nozzle.
2. Soak the burner head for one hour in non-
flammable cleaning solvent. DO NOT USE KERO-
SENE OR FUEL OIL.
3. Usecompressedair to blow out the passages
in the burner head.
CAUTION: NEVER try to open the nozzle
passage with a drill, wire, or any other
tool. Any change in the size or shape of
the passage will damage the nozzle beyond .
repair. Do not disassemble the nozzle,
as flow characteristics are changed by dis-
assembly.
4. Replace thenozzle if there is any evidence of
damage. Blowout a new nozzle using compressed air
(from outlet to inlet) before installing it into the burner
head body. (See figure 5.) Protect the nozzle face to
prevent scratches.
CAUTION: Protect the nozzle passage
from damage when installing a new noz-
zle. Always be careful to keep the noz-
zle CLEAN while it is out of the burner.
5. Install anew rubber sleeve whenever you in-
stall anozzle into the burner. The sleeve helps main-
tain the needed pressure difference between the air and
fuel chambers of the burner head. If bubbles have ap-
peared in the fuel tank during operation, the rubber
sleeve is probably leaking and should be replaced.
RUBBER SLEEVE
SEAL WASHER
SPRING
SEAL WASHER
NOZZLE FACE
NOZZLE PASSAGE
‘Figure 5. Blowing Out Nozzle
5/71
6. Be sure the seal washer, spring, and second
seal washer are in place on the nozzle before install-
ing the rubber sleeve.
7. Use awrench and tighten the nozzle to a torque
of 120 inch pounds.
J. AIR PUMP REPAIR
NOTE: Due to the close tolerances and critical
positioning involved, we recommend that only a
skilled service man attempt to repair the air
pump.
The heater's air pump consists of a rotor with
four carbon blades, rotating inside a pump body. The
rotor is driven directly by the motor, and is supported
by the ball-bearing end of the motor. The motor end
plate also serves as one of the end plates of the pump.
Handle all pump parts with care and keep them
clean. The parts are made with close tolerances.
Dirt and oil will hinder the performance of the pump.
I pump repair is required, you may order the
individual pump parts, as shown in the Parts List,
Section VI.
1. Replacing Carbon Blades.
a. Worn or sticking carbon blades cause a
drop in air pressure. If the blades are worn, or are
sticking in the rotor slots, replace them. (It is not
necessary to remove the rotor or pump body to re-
place the carbon blades.)
b. Blowdustírom rotor slots, end cover and
pump body using compressed air. Do not immerse
parts incleaning solvent. Use a stiff bristle brush to
loosen and remove caked deposit.
‘ce. Install the carbon blades into the slots.
2. Disassembly of Air Pump.
a. Removethe four screws which attach the
end cover, and remove the end cover. Then take out
the two screws which attach the pump body to the
motor, and take off the pump body. |
NOTE: Hold a clean, dry cloth under the pump
while you take itapart, to catch the carbon blades
as they fall out when the pump body is removed.
b. Take the carbon blades out of the rotor.
Pull the rotor and insert off the motor shaft.
3. Replacing the Rotor.
Use anew pump rotor only if deep grooves or
A2809-00
—12-
CHECK FOR SQUARENESS
OF FIT ~~
PUMP ROTOR VA
|-- MOTOR END SHIELD
ROTOR INSERT
(FLAT SURFACE ON
J THIS SIDE)
MOTOR SHAFT
‚005
006 CLEARANCE
MEASURED
WITH
FEELER
GAGE
GAP ADJUSTING SCREW
LOCATION OF
AIR INTAKE
Figure 6. Air Pump Assembly and Rotor Clearance
uneven wear appear onthe surfaces. Check the insert
for wear and replace it if worn, or if it is loose on
the shaft.
To remove the rotor, remove the pump body.
When installing the rotor, take care to keep it perpen-
dicular to the shaft.
4, Reassembly of Air Pump.
a. Install the insert in the pump rotor as
shown in Figure 6, then assemble the rotor on the
motor shaft. Attach the pump body to the motor with
the two screws which were removed.
b. Adjust the pump body to provide 0. 005-
0.006 inch clearance at the point shown in Figure 6.
Measure the clearance with a feeler gage. Spin the
motor by hand to be sure the rotor does not rub on the
pump body. The clearance must be maintained. Be
sure the screws are tightafter adjusting the clearance.
с. Insert the carbon blades, as described
above.
d. Position the end cover with the air line
connection located as shown in Figure 6, then install
the four screws.
e. Install burner head, air filter, and nozzle
assembly. Adjust pump pressure.
K. ADJUSTMENT OF AIR PUMP PRESSURE
1. Install the pressure gage into the output air
filter housing. (See Figure 7.)
2. Start the heater. (Fuel need not be in the tank.)
5/71
> a
3. Pump pressure must be 4 pounds per square
inch, plus or minus 1/10 pound without fuel in tank or
housing in place. If pressure is not within this range,
adjust relief valve.
4. Toadjust, screw the valve stem in (clockwise)
to raise the pressure; out (counterclockwise) to lower
it.
L. REASSEMBLY OF HEATER
1. Installation of Burner Head.
a. Be sure the seal is in place in its recess in
the rear of the burner head casting. (See Figure 8.)
b. Attach the burner head to the pump and
motor assembly with the two screws that were re-
moved. |
c. Install the fuel filter into the burner head.
Tighten flared nut firmly, to avoid air leakage.
d. Place the motor, pump and burner head
in the motor bracket on the fuel tank, being sure to
insert the fuel filter into the rubber bushing in the fuel
tank before attempting to seat the assembled parts.
Attach the motor with the clamps.
e. Install the sparkplug. Be careful to pro-
tect the electrode gap setting.
f. Connecttheair inlet line to the pump body.
(The long end of the line goes into the pump body; the
Short end into the air intake filter.) Tighten the filter
‘and relay bracket.
g. Reinstall the combustion chamber and
tighten the attaching screw. If the combustion cham- .
ber does not fit tight against the face of the burner
head, carefully bend the fins on the back end of the
combustion chamber to eliminate all air gaps where the
two parts meet. If this is necessary, loosen the motor
mounting straps before installing the combustion cham-
ber, then tighten them snugly when the combustion
chamber is in place.
h. Replaceendcapand nose cone assembly.
2. Completing the Reassembly.
a. Put the heater back together in the re-
verse order of disassembly.
b. Checkallwiringto be sure it conforms to
the Wiring Diagram, figure 4. Be sure all electrical
- connections are tight. |
с. Remove the gage and replace the plug,
and install the heater housing. (Be sure to engage the
holding clips at the bottom edges of the housing over
the edges of the tank skirt.
d. Be sure all other parts are in place and
all attaching screws are tight before attempting to use
the heater.
A2810-00
-13-
PRESSURE GAGE
INSTALLED
ADJUSTING SCREW
OUTPUT AIR
FILTER HOUSING
216
Figure 7. Pressure Gage Installation
M. FINAL CHECK
Test-fire the heater for a few minutes after all
service has beencompleted, to be sure it will operate
satisfactorily.
SEAL.
Figure 8. Burner Seal Installation
5/71
Operation and Service Manual Section VI _
О a. Nlustrated Parts List
vu.
22
23
471A
Figure 9. Portable Heater, General Assembly Exploded View
A1972-00 | -14- 7/69
uy Co ©
SECTION. VI
ILLUSTRATED PARTS
This section contains a list of all replaceable parts used
inthe heater covered by this manual. The only parts that are
recommended for replacement by the heater's owner or user
are indicated by the symbol (**). Parts indicated by the sym-
bol (*) are standard hardware items, and may be obtained
loc ally.
LIST
To order parts, first check the nameplate decal for the
correct model number and Spec. No. of the heater.
IN-
CLUDE THE MODEL AND SPEC. NUMBER WHEN ORDER-
ING PARTS. Do not use the index numbers from the illus-
tration when ordering parts.
PARTS LIST FOR FIGURE 9, GENERAL ASSEMBLY, EXPLODED VIEW
25 M15064
Index Part Part Name 8 Qty.
No. Number or Description > Req'd.
1 M12436-1 Housing, Heater @ 1
M11271-6 Nut, Tinnerman 1
2 M12568C Cover, Filter @ 1
3 M10908-2 Screw, Hex hd, slotted, |
No. 6-32 x 3/8 in.,
Type $ * 1
4 M15767-1C End Cap and Nose Cone @ 1
5 WLI-4C Lockwasher, Internal
tooth, 1/4 in. * 2
6 NPC-4C Nut, Plain hex, 1/4-20 * 2
7 M15770G3 Combustion Chamber 1
8 M15995 Plug Button 1
9 (See Fig.10) Motor, Pump and
Burner Head Assy REF
10 HC4-10C Screw, Rd. Hd.,
1/4-20 x 1-1/4 in. * 2
11 M16661 Clamp, Motor 4
12 Not Used
13 WLM-4C Lockwasher, 1/4 in. * 2
14 NPC-4C Nut, Plain hex, 1/4-20 * 2
15 M23140 Fan, 24 Pitch | »** 1
16 SFK-4-2 . Setscrew, Soc. hd.,
cup pt. , 1/4-28 x
1/4 in. 2
17 M12427-1C Fan Guard @ 1
18 WLI-4C Lockwasher, Internal
tooth, 1/4-in. * 2
19 NPC-4C Nut, Plain hex, 1/4-20 * 2
20 M11143-1 Bushing, Strain relief 1
21 Mi3942-4 Connector (Wire Nut) * 2
22 M15779-1 Cord, Service (Extension) 1
69321-108 . Terminal 1
24 M10816-15 Lead, Electrode 1
Transformer, G-E 1
* Standard hardware - Obtainable locally.
** Parts normally replaceable by user of heater.
@ Specify color when ordering painted parts.
A2811-00
-15-
Index Part Part Name 2 Qty.
No. Number or Description = Req'd.
26 M15823-26 Screw, Hex hd,
No. 10-12 x 3/8 in.,
Type B * 2
27 Not Used
28 M10990-3 Bushing, Rubber 1
29 M11151-1 Cap, Fuel tank filler 1
30 Not Used
31 M12424C Skirt, Fuel tank @ 1
32 M10716-1B Fuel Tank Assy e 1
33 M11146-1 Element, Intake air
filter ** 1
34 M17018-1 Filter Body and
Bracket Assy 1
35 WLI-2C Lockwasher, No. 8 * 2
36 RC2-2C Screw, Rd. Hd.,
No. 8-32 x 1/4 in. 1
36 RC2-3C Screw, Rd. Hd. , x
3/8 in. (for ground
wire) * 1
37 M12462-3 Relay, Motor starting 1
38 M9900-37 Wire Assy (to Relay) 1
39 M13293 Grommet, Rubber 1
40 M12432 Tube, Air intake 1
41 M11084-27 Screw, Self-tapping,
Hex hd. , No. 10-12
x 1/2 in., Type À 2
M12634 Decal, Wiring Î
M18196 Decal, Mig. by 1
TOUCH-UP PAINT
M13271 Paint, Aerosol Can
(Medium Gray)
M13386-7 Paint, Aerosol Can, (White)
M13386-6 Paint, Aerosol Can, (Black)
5/71
Figure 10. Motor, Pump and Burner Head Assembly
A2853-00 | -16-
PARTS LIST FOR FIGURE 10, MOTOR, PUMP AND BURNER HEAD ASSEMBLY
Index Part Part Name © Qty.
No. Number or Description $ Req'd.
M19115-6 Motor, Pump and
Burner Head Assy 1
(A) M22031-2 . Burner Head Assy 1
1 M13960 . Nozzle, Siphon 1
2 M10659-1 . Washer, Nozzle seal 2
3 M10809-1 . Spring, Nozzle seal 1
4 M8882 . Sleeve 1
5 M22997 . Plug, Hex hd 1
6 M23105 . . Screw, Adjusting 1
7 M10993-1 . Spring, Pressure relief 1
8 M8940 . Ball 1
9 M12461-54 . Screw, Hex hd. ,
No. 10-24 x 7/8 in. * 2
10 M12576 . Body, Valve 1
11 M12577 . Gasket 1
12 M9942 G3 . Output Filter Element |
Assy 1
13 M12578 . Filter, Lint 1
14 M16895-1 . Spark Plug Assy 1
16 M19112 . Body, Burner Head 1
17 M10908-38- . Screw, No. 12-24 x
3/8 in. , type $ * 1
* Standard hardware — Obtainable locally.
Figure 11.
A2812-00
Handle Arrangement -
-17-
Index Part Part Name © Qty.
No. Number or Description 5 Req'd.
18 M16789-1 Filter Assy, Fuel 1
19 M16791 Connector, Male 1
19A M13849 Nut, Flared 1
20 ROP12-8 . . Roll Pin 4
(B) M19114-2 . Motor and Pump Assy 1
21 FHPF3-8C . Screw, Fil. hd. , °
No. 10-32 x 1 in. * 4
22 M12430 . . End Cover, Pump 1
23 FHPF3-4C . Screw, Fil. hd.,
No. 10-32 x 1/2 in. * 2
24 M8645 . Body, Pump 1
25 M22456-1 . Rotor, Pump 1
26 M22009 . Insert, Rotor 1
27 M8643 . . Blade 4
28 M17941-2 . Motor 1
30 M13372 . Seal (O-Ring) 1
31 FHF3-20C . Screw, Fil. hd., No.
10-32 x 2-1/2 in. * 2
HANDLE ARRANGEMENT
Index Part
No. Number Part Name Quan.
1 *RPC4-18C Screw, Rd. hd., 1/4-20 x
2-1/4 2
2 M12440-2 Handle (Square bar) 1
3 M12439C Support, Handle 1
4 *M10908-58 Screw, Self-tapping, Hex hd. ,
| No. 10-24 x 1-1/2 in. ,
Type ng 2
* Standard hardware - Obtainable locally.
5/71
- Pan A сле e
WARRANTY
We warrant Products sold by us to be in accordance with our published specifications or those
specifications agreed to by us in writing at time of sale, Our obligation and liability under this
warranty is expressly limited to repairing or replacing, at our option, within 90 days or as
otherwise set forth in our published specifications, any product not meeting the specifications,
WE MAKE NO OTHER WARRANTY, EXPRESS OR IMPLIED, AND MAKE NO WARRANTY OF
MERCHANTABILITY OR OF FITNESS FOR ANY PARTICULAR PURPOSE, Our obligation under
this Warranty shall not include any transportation charges or costs of installation or any liability
for direct, indirect or consequential damage or delay, If requested by us, Products or parts for
which a warranty claim is made are to be returned transportation prepaid to our factory, Any
improper use, operation beyond rated capacity, substitution of parts not approved by us, or any
alteration or repair by others in such manner as in our judgment affects the Product materially
and adversely shall void this Warranty, NO EMPLOYEE OR REPRESENTATIVE IS AUTHOR-
IZED TO CHANGE THIS WARRANTY IN ANY WAY OR GRANT ANY OTHER WARRANTY,
WE RESERVE THE RIGHT TO AMEND THESE SPECIFICATIONS AT ANY TIME WITHOUT NOTICE. THE ONLY WARRANTY
APPLICABLE IS OUR STANDARD WRITTEN WARRANTY. WE MAKE NO OTHER WARRANTY, EXPRESSED OR IMPLIED.
K Koehring
Master Division
[XKOEHRING} Dayton, Ohio 45401
A1177-03 | 3/70