FORCED AIR OIL CONSTRUCTION HEATERS
INSTRUCTIONS AND PARTS LIST
MODELS
50,000 BTU/HR 100,000 BTU/HR 150,000 BTU/HR
K50-FA K100-FA K150-FA
SPC-K50 SPC-K100 SPC-K150
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YOUR SAFETY IS IMPORTANT TO YOU AND TO OTHERS,
SO PLEASE READ THESE INSTRUCTIONS BEFORE YOU
OPERATE THIS HEATER.
GENERAL HAZARD WARNING:
!
FAILURE TO COMPLY WITH THE PRECAUTIONS AND INSTRUCTIONS PROVIDED WITH
THIS HEATER, CAN RESULT IN DEATH, SERIOUS BODILY INJURY AND PROPERTY
LOSS OR DAMAGE FROM HAZARDS OF FIRE, EXPLOSION, BURN, ASPHYXIATION,
CARBON MONOXIDE POISONING, AND/OR ELECTRICAL SHOCK.
ONLY PERSONS WHO CAN UNDERSTAND AND FOLLOW THE INSTRUCTIONS SHOULD
USE OR SERVICE THIS HEATER.
IF YOU NEED ASSISTANCE OR HEATER INFORMATION SUCH AS AN INSTRUCTIONS
MANUAL, LABELS, ETC. CONTACT THE MANUFACTURER.
8124B
September 2000
RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE
ANSI Z83.7b-1993
Construction Heater
SAFETY INSTRUCTIONS
This is an oil, direct-fired, forced air heater. It's intended use is primarily temporary heating of buildings under construction, alternation or repair.
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NOT FOR HOME OR RECREATIONAL VEHICLE USE
WARNING
GENERAL PRECAUTIONS
This is a direct-fired forced air heater.
Direct-Fired means that all of the combustion products
enter the heated space. Even though this heater
operates very close to 100 percent combustion efficiency, it still produces small amounts of carbon monoxide. Carbon monoxide (called CO) is toxic. We can
tolerate small amounts but not a lot. OSHA says that 50
parts per million (ppm) in the air we breathe is okay if it
does not average more than that during an 8 hour
working period. Regardless, CO can build up in a
heated space and failure to provide adequate ventilation could result in death. The symptoms of inadequate
ventilation are:
headache
dizziness
burning eyes and nose
nausea
dry mouth or sore throat
So be sure to follow advice about ventilation in these
operating instructions.
Forced Air means that a blower or fan pushes the air
through the heater. Proper combustion depends upon
this air flow; therefore, the heater must not be revised,
modified, or operated with parts removed or missing.
Likewise, safety systems must not be circumvented or
modified in order to operate the heater.
When the heater is to be operated in the presence
of other people the user is responsible for properly
acquainting those present with the safety precautions and instructions, and of the hazards involved.
SAFETY PRECAUTIONS
1. Check the heater thoroughly for damage. Never
operate a damaged heater.
2. Never modify the heater or operate the heater if
it has been modified from its original condition.
3. Use only Kerosene or #1 fuel oil. Never use
gasoline, naphtha, paint thinner, alcohol or other
fuels of any kind.
4. For indoor use only.
5. Use only in well ventilated areas. Provide at
least 2 sq. ft. of opening near the floor and 2 sq.
ft. of opening near the ceiling.
6. Always keep combustibles, like paper and wood
at least 8 ft. from the heater outlet and 3 ft. from
the top, sides and inlet. Locate 10 ft. from
canvas or plastic coverings and secure them to
prevent flapping or movement.
7. Install the heater such that it is not directly
exposed to water spray, rain and/or dripping
water or wind.
8. Never use in areas normally for habitation and/or
where children may be present.
9. Operate only on a stable, level surface.
10. Do not use with ductwork. Do not restrict inlet or
exit.
11. Use only the electrical power specified.
12. Use only a properly grounded 3 wire extension
cord.
13. Do not move, handle or service while hot or
burning.
14. Use only in accordance with State and Federal
ordinances.
CAUTION: Hot while in operation. Do not touch.
Keep children, clothing and combustibles away.
Page 2
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WARNING: FIRE, BURN, INHALATION, AND EXPLOSION HAZARD.
KEEP SOLID COMBUSTIBLES, SUCH AS BUILDING MATERIALS, PAPER
OR CARDBOARD, A SAFE DISTANCE AWAY FROM THE HEATER AS RECOMMENDED BY THE INSTRUCTIONS. NEVER USE THE HEATER IN SPACES
WHICH DO OR MAY CONTAIN VOLATILE OR AIRBORNE COMBUSTIBLES,
OR PRODUCTS SUCH AS GASOLINE, SOLVENTS, PAINT THINNER, DUST
PARTICLES OR UNKNOW CHEMICALS.
OPERATING INSTRUCTIONS
UNPACKING
1. Remove all protective material which may have
been applied to the heater for shipment.
2. Remove the heater from carton
3. Check the heater for possible shipping damage.
If any damage is found immediately notify the
dealer from whom you purchased the heater.
ASSEMBLY (For 100,000 and 150,000 BTU/hr
models only)
Wheel and handles are found in the shipping carton
along with mounting hardware. The wheels, axle and
mounting hardware are in a plastic package. Tools
required are a 5/16" nutdriver, 3/8" open or adjustable
wrench and hammer.
1. Slide the axle (6) through the wheel support
frame (3). Install bushing (9) and wheels (7) on the
axle.
IMPORTANT: The extended hub of the wheel
should be positioned toward the wheels support
frame. Position the cap nuts (8) on the axle
ends and gently tap with a hammer to secure.
2. Position the heater on the wheel support frame
assembly with the exit end over the wheels.
3. Use four screws (4) and nuts (5) to attach the
front handle (1) to the top of the tank flange. The
screws will go through the front handle, the tank
flange and the wheel support frame. Install the
nuts finger-tight-only.
IMPORTANT: Do not tighten nuts until Step 5.
4. Using four screws (2) and nuts (5) install the tank
to support (1) as outlined in Step 3.
5. Tighten all nuts.
OPERATION
TO FUEL
IMPORTANT: Before filling fuel tank the first time or after
extended storage periods drain the fuel tank of any
moisture or condensation.
Fill the fuel tank with clean kerosene, No. 1 fuel oil or No.
1 diesel fuel only. Kerosene is recommended for use
when the temperature drops below zero degrees
fahrenheit (-18o Celsius). In extremely cold weather,
condensation may develop in the tank and it is recommended that a tablespoon of de-icer be added for each
gallon (4 liters) of fuel in the tank.
When filling the heater use at least 2 gallons (8 liters)
of fuel. Be sure heater is level and do not overfill. Use
a funnel or can with a long fill spout.
WARNING: To avoid fire, wipe up any spilled fuel
immediately.
TO LOCATE
WARNING: To avoid fire, place the unit in a level location
away from volatile substances and at a safe distance
from combustible materials. Adequate ventilation is
essential. Refer to the SAFETY PRECAUTION page for
advice on adequate ventilation.
Not suitable for use on wood floors or other combustible materials. When used the heater should rest on
suitable insulating material at least 1 inch thick and
extending 3 feet or more beyond the heater in all
directions.
If at any time the heater should fail to start, smoke
excessively or fire intermittently, unplug it immediately
and consult a qualified service person.
TO START
K50: Plug the heater into a grounded outlet.
K100/K150: Turn thermostat to lowest setting. Plug
heater into a grounded outlet. Turn thermostat to
highest setting (heater will start). Adjust thermostat to
desired setting. Heater will cycle on/off, as heat is
required.
ITEM PART NO. DESCRIPTION QTY.
1 3424 Handle, Front 1
2 7336 Machine Screw, Blk 4
3 3426 Support Tank 1
4 6977 Machine Screw, Blk 4
5 6037 Kep Nut, Blk 8
6 3439 Axle 1
7 6869 Wheel 2
8 6870 Push Nut 2
9 7333 Spacer 2
In cold weather, starting may be improved by holding a
finger over the end of the pressure adjusting screw
until the heater starts. This unit is equipped with a
circuit breaker located near the power cord. If the unit
does not start, check to see that the reset is pressed in.
TO STOP
K50: Unplug the heater.
K100/K150: For a short duration shutdown, where
temperatures will remain above 0oF, turn thermostat to
"off" position. For extended shutdown, or where the
temperature can go below 0oF unplug the heater.
TO RESTART
1. Wait 5 minutes.
2. Push reset button
3. If heater continues to cycle off on flame safety,
see a service person.
Page 3
SERVICING
A hazardous condition may result if a heater is used
that has been modified or is not functioning properly.
When the heater is working properly:
o The flame is contained within the heater with
perhaps some yellow tippng from the exit cone.
o There is no strong disagreeable odor, eye
burning or other physical discomfort.
o There is no smoke or soot internal or external
to the heater.
o There are no unplanned or unexplained
shutdowns of the heater.
The parts list and wiring diagram show the heater as
it was constructed. Do not use a heater which is different
from that shown. Heater performance is effected by air
pressure setting. If there is any uncertainty about the air
pressure setting, have it checked.
A heater which is not working right must be repaired,
but only by a trained, experienced service person. Contact the factory for the service center closest to you, phone
909/981-5343.
You may also obtain in warranty or out of warranty
service by returning the product freight prepaid to:
Scheu Products Company
8855 Baker Avenue
Rancho Cucamonga, CA 91730
Contact customer service for Return Goods Authorization Number.
In warranty products returned to the Service Department will be repaired with no charge for either parts or
labor and will be returned to you freight prepaid. Please
include a brief statement indicating date and place of
purchase and the nature of the problem, and proof of
purchase.
Out of warranty products returned to the Service Department will be repaired with a charge for parts and
labor and will be returned to you freight collect.
MAINTENANCE
WARNING: To prevent personal injury, unplug the heater
form the wall outlet before servicing.
For maximum efficiency and trouble-free service make
the following periodic maintenance cleaning and inspections.
DAILY SCHEDULE
1. GENERAL. Make general visual inspection of heater
for loose or damaged parts. Check nuts and bolts to
insure against looseness caused by vibration or rough
handling. Damaged parts should be repaired or replaced before using heater again. Check heater operation to be sure it is operating normally (See "Servicing"
section for description of normal operation).
2. FILTERS. Dirty air or oil filters will cause an imbalance
in the air-fuel mixture. The best indication that this
condition exists is an increase in odors or difficulty
getting your heater to ignite. This heater should never be
operated without the filters in place. If required clean
filters as described under "500 HR" and "Annual Schedules".
500 HOUR SCHEDULE
1. AIR INTAKE FILTER: Remove and wash the filter
element with a mild detergent, dry thoroughly and
replace. Do not oil the filter element. If your heater is
used where there is considerable dust or dirt, clean as
often as necessary (approximately 50 hrs.).
2. REMOVE DUST: Clean heater twice a season (more
often under dusty conditions). Remove accumulated
dust from the transformer, burner, motor and fan blades
with compressed air. Wipe area clean with a clean dry
cloth. Inspect area to insure all foreign materials are
removed, especially around the burner and combustion
area.
3. CAD CELL: Clean the glass portion of the cad cell with
a soft dry cloth.
4. NOZZLE: Accumulation of dirt from fuel and carbon
from the compressor vanes will eventually fill up the
passages in the nozzle, resulting in reduction of fuel and
air flow. Pressure will gradually increase giving improper
fuel-air mixture and excess odor and smoke. If this
occurs, replace the fuel nozzle.
5. FUEL TANK: Clean twice a season (during frequently
used periods clean twice a month). Drain and flush the
fuel tank with clean fuel oil.
6. SPARK PLUG: Remove and clean the spark plug. Adjust spark plug gap to 1/16".
ANNUAL SCHEDULE
1. AIR OUTPUT FILTER: Remove the air output filter and
tap the contaminated side gently on a solid object to
remove contaminates.
Compressed air or liquids should not be used to clean
this filter. Reinstall cleaned filter in filter body in the
same position as it was when removed. If the filter
appears extremely dirty, replace it with a new filter of the
same type. When replacing the filter cover, be sure the
gasket is firmly in place and the screws in the filter cover
are tight to prevent air leaks.
2. FUEL FILTER: Remove the fuel filter from fuel line and
direct compressed air through the filter in the opposite
direction of fuel flow. Safety glasses should be worn
when using compressed air.
3. AIR AND FUEL LINES: If the air or fuel lines are removed during cleaning, be sure all connections are tight
before operating unit.
4. AIR PRESSURE SETTING: The air pressure has been
properly set at the factory. If the air pressure is out of
adjustment, it will most likely be caused by dirty air
filters, a partially plugged nozzle, an air leak in the
system or improperly set pressure.
If adjustment becomes necessary, first determine the
proper pressure setting for your heater which is printed on
the serial label, located on the fuel tank.
Remove the plug from the air filter cover and attach an
accurate pressure gauge calibrated to a maximum reading
of 15 PSI. Start the heater and note the pressure reading.
If the pressure is low, slowly turn the pressure adjusting
screw in (clockwise) until the correct pressure is obtained.
If the air pressure is high, turn the adjusting screw out
(counter-clockwise) until the pressure is correct.
When correct pressure is reached, unplug the heater,
remove the gauge and replace the plug.
STORAGE
Store the heater in a dry location free from fumes or dust.
At the end of each heating season clean the heater as
described in the MAINTENANCE section. Drain and flush
the fuel tank with clean fuel. The manufacturer recommends completely filling the tank with fuel for extended
storage to minimize condensation inside the tank.
Page 4
HEATER SPECIFICATIONS
MODELS
Input Rating, BTU/hr
Type of Fuel
Fuel Consumption, Gal/Hr
Air Supply Pressure, psig
Fuel Tank Capacity, gals.
Electrical Input
Minimum Operating
Fan
Ignition
Spark Generator
Electrode
Primary Flame Safety
Control
Power Cord
Size (Length x Width x Height)
Net Weight
Shipping Weight
50
50,000
Kerosene or
#1 Fuel Oil Only
.38
3.6
4
115V, 60Hz, 10, 3.5a
100V
1750 rpm, 165 cfm
Direct Spark, continuous
Ignitor, 7000V.sec.
10ma.
Single post electrode
Solid State Control
25-second Timing
1 ft.
30 x 12 x 13
30.5 lbs.
36.0 lbs.
100
100,000
Kerosene or
#1 Fuel Oil Only
.77
4-1/4
12
115V, 60Hz, 10, 5.5a
100V
3450 rpm, 275cfm
Direct Spark, continuous
Transformer, 5,000V.sec.
20ma. or ignitor 7000V 1.0 ma
1/16" gap (.063) or single
post electrode
Solid State Control
25-second Timing
1 ft.
34 x 16 x 25
69 lbs.
74 lbs.
150
150,000
Kerosene or
#1 Fuel Oil Only
1.15
5-1/4
12
115V, 60Hz, 10, 5.5a
110V
3450 rpm, 400cfm
Direct Spark, continuous
Transformer, 5,000V.sec.
20ma. or ignitor 7000V 1.0 ma
1/16" gap (.063) or single
post electrode
Solid State Control
25-second Timing
1 ft.
38 x 16 x 25
76 lbs.
81 lbs.
WIRING DIAGRAM - K100/K150
WIRING DIAGRAM - K50
7428B
8104A
Page 5
K Heaters
Page 7
INSTRUCTIONS FOR ORDERING PARTS - All parts
orders must show heater Model No., Item No., Part
No. and Description. We recommend that only parts
supplied by the manufacturer be used on this unit. A
locally purchased part may appear to be identical,
although in reality it might endanger the heater or the
persons operating the heater.
Kerosene Heaters Parts List
The heater should be serviced only by a trained, experienced service person.
Read the section on "Servicing" before ordering parts.
For parts order, call (909) 981-5343.
Item Part No. Part No. Part No. Description
50 100 150
1 1036 1036 1036 Power Cord Assembly
2 1676 1400 1400 Fuel Tank Assembly
3 1679 1773 1783 Radiation Shield Assy.
4 1688 1779 1782 Control Box Assembly
5 1682 1407 1407 Power Pac Assembly
6 1686 3429 3429 Fuel Tube
7 1685 1771 1768 Grille Assembly
8 ------- 1408 1408 Fuel Filter Assembly
9 4011 4011 4011 Oil Cad Cell Bracket
10 3449 3449 3449 Motor Cord Sleeve
11 1756 1777 3795 Bottom Shell
12 3715 3822 3810 Top Shell
13 3704 3500 3417 Motor Mounting Brkt.
14 3705 3818 3705 Ignition Mounting Brkt.
15 ------ 3427 3427 Access Panel
16 ------ 6864 6864 Start Relay
17 3725 3430 3421 Air Tube
18 6225 6225 6225 Snap Bushing
19 1796 1797 1798 High Limit Control Assy.
20 6831 6831 6831 Air Pump Rotor
21 6832 6832 6832 Backing Plate
22 6833 6833 6833 Air Pump Cylinder
23 6834 6834 6834 Nylon Air Pump Insert
24 6835 6835 6835 Air Pump Vane
25 6836 6836 6836 Lower Housing
26 6837 6837 6837 Upper Housing
27 3761 3761 3761 Nozzle Mounting Plate
28 6839 6839 6839 Gasket
29 6842 6842 6842 Adjustment Screw
30 6843 6843 6843 Outlet Filter
31 6844 6844 6844 Inlet Filter
32 6848 6848 6848 O Ring
33 6849 6849 6849 Nylon Pipe Plug
34 6850 6850 6850 Relief Ball, 1/4" Dia.
35 6851 6851 6851 Spring, 24 O.D. x .58
36 6856 6856 6856 Hose Barb Fitting
Item Part No. Part No. Part No. Description
50 100 150
37 6863 6863 6863 Oil Flame Cntrl Assy.
38 6865 6865 6865 Cad Cell Flame Snsr.
39 ------ 1775 1719 Comb.Cmbr.Cyl. Assy.
40 3843 3843 3843 Electrode Mtg. Brkt.
41 6993 6993 6993 Oil Fuel Cap
42 ------ 3423 3423 Start Relay Brkt.
43 7399 6841 6841 Motor, 1/4 HP
44 7417 7417 7417 Nozzle Adapter
45 7421 6885 6866 Fan
46 ------ 6227 6227 Snap Bushing
47 1684 1684 1684 Ignitor Assembly
48 7416 7538 7537 Fuel Air Aspir. Nozzle
49 6223 6223 6223 Strain Relief Bushing
50 1803 1803 1803 Electrode Assembly
51 7429 7429 7429 Extrnl. Retaining Ring
*
53 3487 3487 3487 Fuel Cap Gasket
54 6847 6847 6847 Hose Barb Fitting
* ------ ------ ----- * 3707 ------ ------ Left Side Panel
* 7094 ------ ------ Clip Handle Mtg.
* 7095 ------ ------ Handle, 3 piece
* 1683 1683 1683 Lead Wire Assy. Grn.
* ------ 1040 1040 Lead Wire Assy. Blk.
61 7424 ------ ------ Snap Bushing, Nylon
* ------ ------ 6225 Snap Bushing, Nylon
* ------ 6862 6862 Fuel Filter Bushing
64 6838 6838 6838 Screw, Tapping #9 x 1¼
65 6908 6908 6908 Screw, Machine #10 x 1¼
66 6906 6906 6906 Screw, Machine #10 x ½
* 1942 1942 Knob Assembly
* 2098 2098 Thermostat Panel Assy.
* 3441 3441 Bracket Thermostat Mtg.
* 1734 1734 Thermostat Assembly
* 6070 6070 Clamp Loop
* K50 items may not be located as shown in exploded view or they may not be shown at all.
FOR THE SPC MODELS ONLY
SPC SPC SPC
Item K50 K100 K150 Description
25-1 1802 1805 3846 Lower Housing
26-1 3701 3845 3847 Upper Housing
Page 6
SCHEU PRODUCTS COMPANY, INCORPORATED
Mail: P.O. Box 250, Upland, CA 91785
Plant: 8855 Baker Ave., Rancho Cucamonga, CA 91730
Telephone: 909/981-5343
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