John Deere AC-350 OPERATOR’S MANUAL

AC-350
SPACE HEATER

Introduction

THANK YOU for purchasing a John Deere product.

READ THIS MANUAL carefully to learn how to operate
and service your machine correctly. Failure to do so
could result in personal injury or equipment damage.
This manual and safety signs on your machine may
also be available in other languages. (See your John
Deere dealer to order.)

THIS MANUAL SHOULD BE CONSIDERED a
permanent part of your machine and should remain
with the machine when you sell it.

MEASUREMENTS in this manual are given in both
metric and customary U.S. unit equivalents. Use only
correct replacement parts and fasteners. Metric and
inch fasteners may require a specific metric or inch
wrench.

GENERAL HAZARD WARNING:
FAILURE TO COMPLY WITH THE PRECAUTIONS
AND INSTRUCTIONS PROVIDED WITH THIS
HEATER, CAN RESULT IN DEATH, SERIOUS
BODILY INJU RY AND PROPERTY LOSS
OR DAMAGE FROM HAZARDS OF FIRE,
EXPOSITION, BURN, ASPHYXIATION, AND/OR
CARBON MONOXIDE POISONING.

The SERIAL NUMBER is located in the Specification
or Identification Numbers section. Accurately record
all the numbers to help in tracing the machine should
it be stolen. Your dealer also needs these numbers
when you order parts. File the identification numbers
in a secure place off the machine.

WARRANTY is provided from your John Deere
dealer for customers who operate and maintain their
equipment as described in this manual. The warranty
is explained on the warranty certificate shown in this
manual.

This warranty provides you the assurance that your
dealer will back products where defects appear
within the warranty period. Should the equipment
be abused, or modified to change its performance
beyond the original factory specifications, the warranty
will become void.

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.

WARNING: FIRE, BURN, INHALATION
AND EXPLOSION HAZARD. KEEP SOLID
COM BUS T IBL E S, SUC H AS BUI LDIN G
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 UNKNOWN CHEMICALS.

WA RN I NG : NO T F OR H OME O R
RECREATIONAL VEHICLE USE.

2 Operator’s Manual

Contents

Page

Safety ........................................................................ 4

Controls ................................................................. 11

Preparation ............................................................... 12

Operation ................................................................ 14

Troubleshooting ..................................................... 16

Service .................................................................... 19

Storage .................................................................... 24

Specifications ......................................................... 25

Wire Diagram ............................................................ 26

Warranty ..................................................................27

Notes ................................................................... 28-29

All information, illustrations and specifications in this manual are based on the latest

information available at the time of publication. The right is reserved to make changes at any

time without notice.

Operator’s Manual 3

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Safety

RECOGNIZE SAFETY INFORMATION

This is the safety alert symbol. When you see this
symbol on your machine or in this manual, be alert to
the potential for personal injury.

Follow recommended precautions and safe operating
practices.

UNDERSTAND SIGNAL WORDS

A signal word--DANGER, WARNING or CAUTION--is
used with the safety-alert symbol. DANGER identifies
the most serious hazards.

DANGER or WARNING safety signs are located near
specific hazards. General precautions are listed on
CAUTION safety signs. CAUTION also calls attention
to safety messages in this manual.

FOLLOW SAFETY INSTRUCTIONS

Carefully read all safety messages in this manual and on
your machine safety signs. Keep safety signs in good
condition. Replace missing or damaged safety signs.
Be sure new equipment components and repair parts
include the current safety signs. Replacement safety
signs are available from your John Deere dealer.

Read this owner’s manual carefully and completely before
trying to assemble, operate, or service this space heater.
Improper use of this space heater can cause serious injury
or death from burns, fire, explosion, electrical shock, and
carbon monoxide poisoning.

Make certain you read and understand all warnings.
Keep this manual for reference. It is your guide to safe
and proper operation of this space heater.

If you do no understand any part of this manual and need
assistance, contact your John Deere dealer.

4 Operator’s Manual

CARBON MONOXIDE - POISONOUS GAS

DANGER: CARBON MONOXIDE POISONING MAY LEAD TO
DEATH!

Space heaters exhaust contains carbon monoxide - a poisonous gas
that can kill you. You CAN NOT smell or see this gas.

Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning
resemble the flu, with headaches, dizziness, and/or nausea. If you have
these signs, the space heater may not be working properly. Get fresh air at
once! Have space heater serviced. Some people are more affected by carbon
monoxide than others. These include pregnant women, persons with heart
or lung disease or anemia, those under the influence of alcohol, and those
at high altitudes.

Never use a space heater in enclosed or partially-enclosed spaces without
proper ventilation. Use only in well-vented areas. Before using space heater,
provide at least a three-square-foot (2800 square cm) opening of fresh,
outside air for each 100,000 Btu / Hr (30 kw) of rating. Space heaters can
produce high levels of carbon mono

xide very quickly. When you use a space
heater, remember that you cannot smell or see carbon monoxide. Even if you
can’t smell exhaust fumes, you may still be exposed to carbon monoxide.

If you start to feel sick, dizzy, or weak while using a space heater, get to fresh
air RIGHT AWAY. DO NOT DELAY. The carbon monoxide from space heaters
can rapidly lead to full incapacitation and death.

If you experience serious symptoms, get medical attention immediately.
Inform medical staff

that carbon monoxide poisoning is suspected. If you
experienced symptoms while indoors, have someone call the fire department
to determine when it is safe to re-enter the building.

NEVER operate the space heater in an explosive atmosphere, near
combustible materials or where ventilation is not sufficient to carry away
exhaust fumes. Exhaust fumes can cause serious injury or death.

NEVER run space heaters inside homes, garages, sheds, or other semi­enclosed spaces without proper ventilation. These spaces can trap poisonous
gases EVEN IF you run a fan or open doors and windows. Use only in well­vented areas. Before using space heater, provide at least a three-square-foot
(2800 square cm) opening of fresh, outside air for each 100,000 Btu / Hr (30
kw) of rating.

If you start to feel sick, dizzy, or weak while using the space heater, shut
if off and get fresh air RIGHT AWAY. See a doctor. You may have carbon
monoxide poisoning.

Install battery-operated carbon monoxide alarms or plug-in carbon monoxide
alarms with battery back-up in your home, according to the manufacturer’s
installation instructions. The carbon monoxide alarms should be certified to
the requirements of the la
(UL 2034, IAS 6-96, or CSA 6.19.01).

test safety standards for carbon monoxide alarms.

Test your carbon monoxide alarm frequently and replace dead batteries.

Operator’s Manual 5

SAFETY WARNING WHEN REFUELING

Use only kerosene or #1 fuel oil to avoid risk of fire or explosion. Never use
gasoline, naphtha, paint thinners, alcohol, or other highly flammable fuels.
Personnel involved with fueling shall be qualified and thoroughly familiar
with the manufacturer

’s instructions and applicable regulations regarding

the safe fueling of heating units.

Only the type of fuel specified on the space heater

’s data plate shall be

used.

All flame, including the pilot light, if any, shall be extinguished and the space
heater allowed to cool, prior to fueling.

During fueling, all fuel lines and fuel-line connections shall be inspected
for leaks. Any leaks shall be repaired prior to returning the space heater to
service.

At no time shall more than one day

’s supply of space heater fuel be stored
inside a building in the vicinity of the space heater. Bulk fuel storage shall
be outside the structure.

All fuel storage shall be located a minimum of 25 feet (762cm) from space
heaters, torches, welding equipment, and similar sources of ignition
(exception: the fuel reservoir integral with the space heater unit).

Whenever possible, fuel storage shall be confined to areas where floor
penetrations do not permit fuel to drip onto or be ignited by a fire at lower
elevation.

Fuel storage shall be in accordance with the authority having jurisdiction.

Observe all safety regulations for the safe handling of fuel. Handle fuel in
safety containers. If the container does not have a spout, use a funnel.

Do not overfill the fuel tank, leave room for the fuel to expand.

Do not refill fuel tank while the unit is running. Before refueling

the space

heater, turn it off and let it cool down.

Fill the tank only on an area of bare ground. While fueling the tank, keep
heat, sparks and open flame away. Carefully clean up any spilled fuel before
starting the unit.

Always fill fuel tank in an area with plenty of ventilation to avoid inhaling
dangerous fumes.

NEVER store fuel for your space heater in the home. Gasoline,

propane,
kerosene, and other flammable liquids should be stored outside of living
areas in properly-labeled, non-glass safety containers. Do not store them
near a fuel-burning appliance, such as a natural gas water heater in a
garage. If the fuel is spilled or the container is not sealed properly, invisible
vapors from the fuel can travel along the ground and can be ignited by the

appliance’s pilot light or by arcs from electric switches in the appliance.

6 Operator’s Manual

ELECTRICAL HAZARDS

DANGER- IMPROPER CONNECTION OF THE EQUIPMENT­ GROUNDING CONDUCTOR CAN RESULT IN A RISK OF
ELECTROCUTION. CHECK WITH A QUALIFIED ELECTRICIAN
OR SERVICE PERSON IF YOU ARE IN DOUBT AS TO WHETHER
THE UNIT IS PROPERLY GROUNDED.

Use only the electrical voltage and frequency specified on
model plate.

Space heater must be grounded. Use only a properly grounded three-wire
extension cord. Plug into grounded outlet only. If it should malfunction or
breakdown, grounding provides a path of least resistance for electric current
to reduce the risk of electric shock.

The space heater is a potential source of electrical shock if not kept dry.
Keep the space heater dry and do not use in rain or wet conditions. To
protect from moisture, operate it on a dry surface under an open, canopy­like structure. Dry your hands if wet before touching the space heater.

Check that the entire cord is free of cuts or tears and that the plug has all
three prongs, especially a grounding pin.

Operator’s Manual 7

IMPORTANT SAFETY INSTRUCTIONS

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Make certain you read and understand all warnings. Keep this
manual for reference. It is your guide to safe and proper operation
of this heater.

1. Use only in areas free of flammable vapors or high dust

content.

2. Minimum heater clearances from combustible materials:

Outlet: 8 Ft. (2.44 m), Sides: 4 Ft. (1.2 m), Top: 6 Ft. (1.83 m),
Rear: 4 Ft. (1.2 m)

3. Locate space heater on a stable and level surface while hot or

operating or a fire may occur.

4. Use only in well-vented areas. Before using space heater, provide

at least a three-square-foot (2800 square cm) opening of fresh,
outside air for each 100,000 Btu / Hr (30 kw) of rating.

5. Keep children and animals away from space heater at all times.

6. Use space heater only in accordance with local ordinances and

codes.

7. Keep space heater area clear and free from combustible materials,

gasoline, paint thinner and other flammable vapors and liquids.

8. Never use space heater in living or sleeping areas.

9. Never leave a space heater plugged in wit h o u t adult

supervision if children or animals are likely to be present. Do not
leave heater unattended.

10. Never move, handle or service a hot or operating heater. Severe

burns may result. You must wait 15 minutes after turning heater
off.

11. Never attach duct work to front or rear of space heater.

12. Space heaters used in the vicinity of tarpaulins, canvas, or

similar enclosure materials shall be located a safe distance from
such materials. The recommended minimum safe distance is
10 feet (304.8cm). It is further recommended that these enclosure
materials be of a fire retardant nature. These enclosure materials
shall be securely fastened to prevent them from igniting or from
upsetting the space heater due to wind action.

13. Unplug space heater when not in use.

14. Never block air inlet (rear) or air outlet (front) of space heater.

15. This product has been approved for use in the Commonwealth

of Massachusetts.

16. Use only the hose and factory preset regulator provided with

the heater.

17. Use only with the electrical voltage and frequency specified on

model plate.

18. For indoor use only. Do not use heater outdoors.

8 Operator’s Manual

IMPORTANT SAFETY INSTRUCTIONS

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19. When moving or storing heater, keep heater in a level position
or fuel spillage may occur.

20. Check heater for damage before each use. Do not use
a damaged heater.

21. Check hose before each use of heater. If highly worn or
cut, replace with hose specified by manufacturer before using
heater.

22. Keep heater away from strong drafts, wind, water spray, rain
or dripping water.

23. To prevent injury, wear gloves when handling heater.

24. Do not alter heater. Keep heater in its original state.

25. Do not use heater if altered.

26. Use only original replacement parts. This heater must
use design-specific parts. Do not su b s titute or use
generic parts. Improper replacement parts could cause
serious or fatal injuries.

27. This heater is equipped with a thermostat. Plugged in heater may
start at anytime!

28. Never start heater when combustion chamber is hot or if fuel has
accumulated in combustion chamber.

29. Never move, handle, refuel or service a hot, operating or plugged­ in heater.

SAVE THESE INSTRUCTIONS

Operator’s Manual 9

WEAR PROTECTIVE CLOTHING

Wear close fitting clothing and safety equipment appropriate
to the job.

Wear a suitable hearing protective device such as
earmuffs or earplugs to protect against objectionable or
uncomfortable loud noises.

Operating equipment safely requires the full attention of
the operator. Do not wear radio or music headphones while
operating machine.

PREPARE FOR EMERGENCIES

Keep a first aid kit and fire extinguisher handy.
Keep emergency numbers for doctors, ambulance service,

hospital and fire department near your telephone.
Be prepared if a fire starts.

INSPECT SPACE HEATER

Be sure all covers, guards and shields are tight and in
place.

Locate all operating controls and safety labels.
Inspect power cord for damage before using. There is a
hazard of electrical shock from crushing, cutting or heat
damage.

Remove all packing items applied to space heater for
shipment. Remove all items from carton. Check items for

any shipping damage. If space heater is damaged, promptly
inform dealer where you bought space heater.

SERVICE SPACE HEATER SAFELY

Before servicing the space hea

ter, disconnect all equipment

and battery (if equipped) and allow unit to cool down.
Service space heater in a clean dry flat area.

10 Operator’s Manual

CONTROLS

A

B

C

D

E

F

G

H

AC-350

Controls

A -- Hot Air Outlet (Front)
B -- Upper Shell
C -- Power Cord

D -- Flame-Out Control Reset Button
E -- Thermostat
F -- Fuel Tank

G -- Fuel Cap
H -- Lower Shell

Operator’s Manual 11

Preparation

VENTILATION

WARNING: FOLLOW THE MINIMUM FRESH, OUTSIDE
AIR VENTILATION REQUIREMENTS. IF PROPER
FRESH, OUTSIDE AIR VENTILATION IS NOT
PROVIDED, CARBON MONOXIDE POISONING
CAN OCCUR. PROVIDE PROPER FRESH, OUTSIDE
AIR VENTILATION BEFORE RUNNING HEATER.

Fresh Air Opening Requirements:
Heater Size Square Feet Opening
350,000 Btu/Hr 10.5

Note: If you use more than one heater, provide extra fresh
air. Provide a fresh air opening of at least three square feet
for each 100,000 Btu/Hr rating.

FUELS

WARNING: USE ONLY KEROSENE OR #1 FUEL OIL
TO AVOID RISK OF FIRE OR EXPLOSION. NEVER
USE GASOLINE, NAPHTHA, PAINT THINNERS,
ALCOHOL OR OTHER HIGHLY FLAMMABLE
FUELS.

Do not use heavy fuels such as No. 2 fuel oil or No. 2 diesel.
Using heavy fuels will result in:

• clogged fuel filter and nozzle

• carbon build-up on spark plug

• the need of non-toxic anti-icer in fuel during very cold
weather

IMPORTANT: Use a KEROSENE ONLY storage container.
Be sure storage container is clean. Foreign matter such as
rust, dirt or water will cause flame-out control to shut down
heater. Foreign matter may also require you to clean fuel
system often.

12 Operator’s Manual

Preparation

Fan

Clean
Heated
Air Out

Combustion Chamber

Spark Plug

Burner
Head

Solenoid
Valve

Motor

Electronic
Ignitor

Fuel Tank

Nozzle

Fuel

Air for
Combustion
and Heating

Fuel Line To
Solenoid Valve

Fuel
Filter

Fuel Pickup
Line

Cool
Air In

Fuel Pump/
Fuel Filter

THEORY OF OPERATION

The Fuel System: The motor turns the fuel pump. The fuel pump pulls fuel from the fuel tank. The fuel pump

pushes fuel through a filter and a solenoid valve and out the burner head nozzle. A fine mist of fuel is sprayed into
the combustion chamber.

The Air System: The motor turns the fan. The fan pushes air into and around the combustion chamber. This air
is heated and provides a stream of clean, hot air.

The Ignition System: The electronic ignitor sends voltage to the spark plug. The spark plug ignites the fuel and
air mixture.

The Flame-Out Control System: This system causes the heater to shut down if the flame goes out. It also allows
the fan to continue running after normal shutdown of heater. This cools the combustion chamber.

Operator’s Manual 13

Operation

Flame-Out
Control
Reset Button

OPERATION

IMPORTANT: Review and understand the warnings in
the Safety Information section. They are needed to safely
operate this space heater. Follow all local ordinances and
codes when using this space heater.

WARNING: FOLLOW THE MINIMUM FRESH,
OUTSIDE AIR VENTILATION
REQUIREMENTS. IF PROPER FRESH,
OUTSIDE AIR VENTILATION IS NOT
PROVIDED, CARBON MONOXIDE
POISONING CAN OCCUR. PROVIDE
PROPER FRESH, OUTSIDE AIR
VENTILATION BEFORE RUNNING
HEATER.

START SPACE HEATER:

1.

Follow all ventilation and safety information.

2. Locate heater to provide maximum circulation of the
heated air. Follow all location requirements noted in the
Safety Information section of this manual.

3. Fill fuel tank with kerosene or #1 fuel oil.

4. Attach fuel cap.

5. Set thermostat dial to desired temperature.

Note: Thermostat setting must be higher than surrounding

air temperature.

6. Plug power cord of heater into three-prong, grounded
extension cord. Extension cord must be at least 6 feet
long.

WARNING: USE ONLY A THREE-PRONG,
GROUNDED EXTENSION CORD. USE CORD
WITH PROPER WIRE SIZE TO ASSURE 120
VOLT OPERATION. (FIG. 1)

7. Plug extension cord into standard 120 volt/60 hertz,
three-hole, grounded outlet.

8. The motor will start when extension cord is plugged
into outlet. The heater should ignite at once. If heater
does not ignite, restart heater. To restart heater, wait 60
seconds, then push in flame-out control reset button.
Flame-out control reset button is at rear of heater near
power cord (Fig. 2).

Note: A cold heater may affect the thermostat setting. This

thermostat is a general-heating control. It is not intended
for precise temperature control. Adjust thermostat until
heater cycles at the desired setting.

Note: If starting heater for first time, you may need to prime

the pump. If equipped, slightly open bleeder valve of pump
to allow air to escape. Quickly close valve once fuel is
seen. Wipe up any excess fuel. If equipped with canister
fuel filter, remove the canister bottom and fill with fuel.
Reassemble filter. Wipe up any excess fuel. You may also
have to do this after taking heater out of storage.

14 Operator’s Manual

Length of Cord: Rated Cord:
Up to 100 feet (30.48 m) 14 AWG
101 to 200 feet (30.78 to 60.96 m) 12 AWG
201 to 300 feet (61.26 to 91.44 m) 10 AWG
301 to 400 feet (191.74 to 121.92 m) 8 AWG
401 to 500 feet (122.22 to 152.40 m) 6 AWG

Extension Cord Size Requirement

(Fig. 1)

(Fig. 2)

Operation

OPERATION (CONTINUED)

STOP SPACE HEATER:

CAUTION: NEVER UNPLUG HEATER WHILE
HEATER IS RUNNING. HEATER MUST GO
THROUGH PURGE CYCLE. THE PURGE CYCLE
COOLS THE COMBUSTIONCHAMBER. DAMAGE
TO HEATER CAN OCCUR IF COMBUSTION
CHAMBER IS NOT COOLED. DO NOT RESTART
HEATER UNTIL PURGE CYCLE IS COMPLETE.

1. Turn thermostat dial to lowest temperature setting. This will
cause heater flame to go out. The motor will continue to
run during the purge cycle. This allows the fan to cool the
combustion chamber. When the purge cycle is finished, the
motor will stop. Do not unplug heater until purge cycle is
finished.

2. Unplug extension cord from outlet.

3. To temporarily

stop heater, set thermostat at a temperature
lower than air around heater. Heater will cycle back on if air
temperature around heater matches thermostat setting.

TO RESTART SPACE HEATER:

CAUTION: DO NOT RESTART HEATER UNTIL
PURGE CYCLE IS FINISHED. THE PURGE
C YC LE CO OL S T HE C OM B US TI O N
CHAMBER.

1. Wait until purge cycle is finished after stopping heater.

2. Repeat steps under

"Start Space Heater".

Operator’s Manual 15

Troubleshooting

WARNING: HIGH VOLTAGE. NEVER SERVICE SPACE HEATER WHILE IT IS PLUGGED IN,
OPERATING, OR HOT. SEVERE BURNS AND ELECTRICAL SHOCK CAN OCCUR.

Symptom Problem Solution

Motor does not start when
heater is plugged in and
thermostat setting is higher
than surrounding air
temperature.

No power or low voltage at
heater due to:
a. Damaged power cord or
extension cord.

b. Wrong size extension cord.

c. Heater plugged into outlet
with voltage lower than 120
volt.

a. Check condition of power cord or
extension cord. Repair or replace if
damaged.
b. Use extension cord with proper wire
size (see Start Heater).
c. Make sure heater is plugged into 120
volt/60 hertz outlet.

Loose electrical connections.

Motor overload protector tripped
due to:
a. Dirty fan.

b. Debris pulled into fan area
by fan.
c. Binding pump.

d. Low voltage.

Flame-out control not reset.

Damaged flame-out control.

Damaged power relay.

Damaged thermostat.

Check connections. Tighten if loose.

a. See "Maintenance: Fan Blades and
Air Deflectors".
b. Remove debris from fan and fan
guard area.
c. Turn fan by hand. If fan is hard to turn,
see "Maintenance: Pump".
d. Follow the extension cord steps listed
above (a & b).

Note: Be sure to reset motor overload
protector by pressing reset button on top
of motor.

Press and release flame-out control
reset button.

Replace flame-out control.

Replace power relay.

Replace thermostat.

Binding pump.

16 Operator’s Manual

Turn fan by hand. If fan is hard to turn,
see "Maintenance: Pump".

Troubleshooting

WARNING: HIGH VOLTAGE. NEVER SERVICE SPACE HEATER WHILE IT IS PLUGGED IN,

.

OPERATING, OR HOT. SEVERE BURNS AND ELECTRICAL SHOCK CAN OC

CUR.

Symptom Problem Solution

Heater will not ignite,
but motor runs for a
short period of time.

Fuel tank empty.

Water in fuel.

Wrong fuel.

Dirt in nozzle.

Very low temperature may
cause fuel to thicken and not
flow.

Dirty fuel filters.

Wrong pump pressure.

Add fuel to tank.

Check fuel tank for bubbles of water
in bottom. If found, remove fuel (see
Storage). Clean tank and fuel filters
(see Maintenance: Fuel Filters). Fill
with clean fuel.

Remove wrong fuel (see Storage).
Clean tank and fuel filters (see Main

­tenance: Fuel Filters). Fill with correct
fuel.

Replace nozzle (see Maintenance:
Nozzle).

Move heater to warmer place until fuel
flows freely.

Clean fuel filters (see Maintenance:Fuel
Filters).

Adjust pump pressure (see
Maintenance: Pump Pressure
Adjustment).

Spark plug wire disconnected

Connect spark plug wire to spark plug.

from plug.

Spark plug problems due to:
a. Wrong gap.

a. Adjust electrode gap to 0.075"
(see Maintenance: Spark Plug).

b. Plug wet with fuel.

b. Clean fuel from spark plug with
clean, soft cloth.

c. Carbon deposits on plug.

c. Replace plug if heavily coated with
carbon

(see Maintenance: Spark `

Plug).

d. Damaged plug.

d. Inspect plug for worn or eroded
electrodes. If found, replace plug

(see Maintenance: Spark Plug).

Solenoid valve not opening.

Check electrical connections and
voltage to solenoid. If good, replace
solenoid valve.

WARNING: HIGH VOLTAGE!

Damaged electronic ignitor.

Operator’s Manual 17

Replace electronic ignitor.

Troubleshooting

WARNING: HIGH VOLTAGE. NEVER SERVICE SPACE HEATER WHILE IT IS PLUGGED IN,
OPERATING, OR HOT. SEVERE BURNS AND ELECTRICAL SHOCK CAN OC

CUR.

Symptom Problem Solution

Heater ignites, but flame­out control shuts off
heater after a short period
of time.

Heater burns, but puffs of
smoke can be seen.
Heater does not burn
steady.
Heater burns with odor.
Heater smokes continu­ously.

Wrong pump pressure.

Dirty fuel filters.

Dirt in nozzle.

Dirty photocell lens.

Open or damaged photocell.

Bad flame-out control.

Damaged fan switch.

Wrong pump pressure

Heater almost out of fuel

Water condensation in fuel tank

Adjust pump pressure (see Mainte­nance: Pump Pressure Adjustment).

Clean fuel filters (Maintenance: Fuel
Filters).

Replace nozzle (see Maintenance:
Nozzle).

Clean photocell lens with clean cotton
swab.

Replace photocell.

Replace flame-out control.

Replace fan switch.

Adjust pump pressure (see Mainte­nance: Pump Pressure Adjustment).

Add fuel to tank

Check fuel tank for bubbles of water
in bottom. If found, remove fuel (see
Storage). Clean tank and fuel filters
(see Maintenance: Fuel Filters). Fill
with clean fuel

Wrong fuel

Remove wrong fuel (see Storage).
Clean tank and fuel filters

(see Main­tenance: Fuel Filters). Fill with correct
fuel

Dirty fuel filters

Clean fuel filters

(see Maintenance:

Fuel Filters).

Air leak in suction system

Tighten all fuel line connections (see
Maintenance: Fuel Lines).

Dirty nozzle

Replace nozzle (see Maintenance:
Nozzles).

Low voltage causing motor to
operate below rated speed

Check voltage at heater. Voltage at
heater should be not less than 90%
of rated voltage (108V minimum for
120V heaters)

Loose fuel line

Check and tighten all fuel line connec­tions (see Maintenance: Fuel Lines).

18 Operator’s Manual

Service

MAINTENANCE

PREVENTATIVE MAINTENANCE SCHEDULE:

WARNING: HIGH VOLTAGE. NEVER SERVICE SPACE HEATER WHILE IT IS PLUGGED IN,
OPERATING, OR HOT. SEVERE BURNS AND ELECTRICAL SHOCK CAN OCCUR.

Item How Often How to

Fuel tank

Flush every 150-200 hours of
operation or as needed

See "Storage".

Filler Neck Screen

Fuel Filter Assembly
(Fuel Tank)

Fuel Filter Lines

Fuel Filter (In Pump or
External Canister)

Spark Plug

Fan Blades and Air
Deflectors

Air Passages around
Burner Head

Motor

Check for particles in fuel
when filling fuel tank. Clean
when dirty

Clean twice a heating season
or replace as needed

Check and tighten loose con­nections occasionally

Clean fuel filter element every
250 hours

Clean and regap every 300
hours of operation or replace
as needed

Clean each season or as
needed

Check each season for dirt
and debris

Not required, permanently
lubricated

Lift out of fuel tank and rinse with
clean kerosene

See "Maintenance: Fuel Filters".

See "Maintenance: Fuel Filters".

See "Maintenance: Fuel Filters".

See "Maintenance: Spark Plug".

See "Maintenance: Fan Blades
and Air Deflectors".

Remove debris and trash with a
clean, soft cloth

Operator’s Manual 19

Service

MAINTENANCE:

WARNING: TO AVOID RISK OF BURN AND
ELECTRICAL SHOCK, NEVER ATTEMPT
TO SERVICE SPACE HEATER WHILE IT IS
PLUGGED IN, OPERATING, OR HOT.

KEEP HEATER CLEAR AND FREE FROM
COMBUSTIBLE MATERIALS, GASOLINE AND
OTHER FLAMMABLE VAPORS AND LIQUIDS

DO NOT BLOCK THE FLOW OF COMBUSTION
OR VENTILATION AIR.

1. Keep heater clean. Clean heater annually or as
needed to remove dust and debris. If heater is dirty or
dusty, clean heater with a damp cloth. Use household
cleaners on difficult spots.

2. Inspect heater before each use.

3. Have heater inspected yearly by a qualified service
agency.

4. Keep inside of heater free from combustible and
foreign objects. Remove motor and other internal
parts if needed to clean inside of heater.

5. Clean fan blades each season or as needed.

20 Operator’s Manual

MAINTENANCE (CONTINUED):

Upper Shell

Fan
Blade

Air
Deflector

Spark Plug
Wire

Spark Plug

Burner
Head

.075
inch

Service

WARNING: NEVER SERVICE HEATER WHILE
IT IS PLUGGED IN, CONNECTED TO
PROPANE SUPPLY, OPERATING OR
HOT. SEVERE BURNS AND ELECTRICAL
SHOCK CAN OCCUR.

ONLY A QUALIFIED SERVICE PERSON
S H OU L D SE RV ICE AN D R EPA IR
HEATER.

UPPER SHELL REMOVAL

:

1. Remove screws along each side and top of heater using

5/16" nut-driver. These screws attach upper and lower
shells together (Fig. 3).

2. Lift upper shell off.

FAN BLADES AND AIR DEFLECTORS:

1. Remove upper shell. (see Mantenance: Upper Shell

Removal).

2. Clean fan blades and air deflectors with clean, soft cloth

moistened with kerosene or solvent (Fig. 4).

3. Dry fan blades and air deflectors thoroughly.

4. Replace upper shell.

(Fig. 3)

SPARK PLUG:

1.

Remove upper shell.

(see Mantenance: Upper Shell

Removal).

2. Remove spark plug wire from spark plug (Fig. 5).

3. Remove spark plug from burner head using 13/16"

open-end wrench (Fig. 5).

4. Replace spark plug if damaged or heavily coated with

carbon.

5. Clean and regap spark plug electrodes to .075 inch

(Fig. 6).

6. Install spark plug in burner head.

7. Attach spark plug wire to spark plug.

8. Replace upper shell.

(Fig. 4)

(Fig. 5)

(Fig. 6)

Operator’s Manual 21

Service

Spark Plug

Burner
Head

Fuel Line

Solenoid Valve

Plug

Nozzle

Spark Plug
Wire

Pump Pressure
100 PSI

Pressure
Gauge

Fuel Pump Port
Marked "GAUGE"

Fuel Pump
Port Marked
"PRESS ADJ"

Hex Screw
On Flange
Clamp

NOZZLE:

1. Remove upper shell. (see Mantenance: Upper Shell
Removal).

2. Remove fuel line from solenoid valve using 7/16"
wrench.

3. Remove spark plug wire from spark plug.

4. Remove spark plug from burner head using 13/16" open­end wrench.

5. Remove five screws using 5/16" nut-driver and remove
burner head from combustion chamber.

6. Place burner head into vise and lightly tighten.

7. Carefully remove nozzle from burner head using 5/8"
socket wrench (Fig. 7).

8. Inspect nozzle for damage. If damaged or clogged, replace
nozzle.

9. Make sure plug is in place on burner head.

10. Replace nozzle into burner head and tighten firmly
(175-200 inch-pounds).

11. Attach burner head to combustion chamber.

12. Install spark plug in burner head.

13. Attach spark plug wire to spark plug.

14. Attach fuel line to solenoid valve. Tighten firmly.

15. Replace upper shell.

(Fig. 7)

(Fig. 8)

PUMP PRESSURE ADJUSTMENT:

1. Remove pressure gauge plug from fuel pump port marked

2. Install pressure gauge to fuel pump port marked “GAUGE

3. Start heater. Allow motor to reach full speed.

4. Adjust pressure. Use small flat blade screwdriver to

5. Stop heater.

6. Remove pressure gauge. Replace pressure gauge plug

PUMP:
(Procedure if Pump is Binding)

1. Remove upper she ll (Maintenance: Upper Shell

2. Loosen hex screw on flange clamp at rear of motor with

3. Turn fan with hand (Fig. 10).

4. If fan turns freely, tighten screw on flange clamp.

5. If fan does not turn freely, replace pump.

6. Replace upper shell.

22 Operator’s Manual

“GAUGE.”

(Fig. 8).

turn slotted screw at fuel pump pressure adjusting port.
Turn screw clockwise to increase pressure. Turn screw
counterclockwise to decrease pressure. See specifications
in Figure 8 for correct pressure for each model.

in fuel pump port marked “GAUGE.”

Removal).

5/16" nut-driver (Fig. 9).

”

(Fig. 9)

(Fig. 10)

Service

Fuel
Line

Solenoid

Valve

Burner Head

Fuel
Pump

Fuel
Lines

Fuel
Filter

Fuel
Lines

Fuel Pump (Filter
Under Cover)

Canister
Top

Gasket

Canister
Bottom

Fuel
Filter

Fuel
Lines

FUEL LINES:
(Procedure for Tightening Fuel Lines)

1. Remove upper shell (see Mantenance: Upper Shell
Removal).

2. Use an adjustable wrench as a backup on fittings.

3. Use 7/16" wrench and tighten fuel lines at solenoid valve,
pump and fuel filter canister (if equipped) (Fig. 11 and

12).

FUEL FILTERS:

Tank Fuel Filter

1. Disconnect fuel lines from pump and fuel filter canister
(if equipped) with 7/16" wrench (Fig. 13 or 14).

2. Carefully pry fuel filter loose from fuel tank with flat end of
screwdriver.

3. Inspect fuel filter for water or dirt.

4. Rinse fuel filter and fuel lines with clean kerosene.

5. Replace fuel filter into fuel tank.

6. Connect fuel lines to pump and fuel filter canister
(if equipped).

Filter/Canister External To Pump

1. Unscrew canister bottom from canister top with adjustable
pliers.

2. Remove fuel filter and gasket from canister bottom
(Fig. 14).

3. Inspect canister bottom and fuel filter for water droplets
or dirt.

4. Rinse canister bottom in clean kerosene.

5. Wipe inside of canister bottom dry with clean cloth.

6. Rinse fuel filter in clean kerosene.

7. Put clean fuel filter and gasket back in canister bottom.

8. Screw canister bottom into canister top.

9. Tighten securely. Check for leaks.

(Fig. 11)

(Fig. 12)

(Fig. 13)

Operator’s Manual 23

(Fig. 14)

Storage

STORAGE

Note: If shipping, transport companies require fuel tanks
to be empty.

1. Drain all fuel from fuel lines and pump/filter (see
Maintenance: Fuel Filters).

2. Clean and flush fuel filter in fuel pump if equipped (see
Maintenance: Fuel Filters).

3. Remove drain plug and drain fuel tank.

4. Replace drain plug.

5. If any debris is noted in old fuel, add 1 or 2 quarts of
clean kerosene to tank, stir and drain again. This will
prevent excess debris from clogging filters during future
use.

6. Replace fuel cap or drain plug. Properly dispose of
old and dirty fuel. Check with local automotive service
stations that recycle oil.

7. Add two gallons of clean kerosene or #1 fuel oil to fuel
tank.

8. Replace fuel cap.

9. Operate heater for 5 minutes (see Operation).

10. Stop heater and let cool completely.

11. Remove drain plug and drain fuel tank.

12. Replace drain plug.

13. Properly dispose of old and dirty fuel.

14. If storing, store heater in a dry location. Make sure
storage place is free of dust and corrosive fumes.

IMPORTANT: Do not store kerosene over summer months
for use during next heating season. Using old fuel could
damage heater.

24 Operator’s Manual

Specifications

ITEM SPECIFICATION

Model Size AC-350

Output Rating (BTU / Hr) 350,000

Fuel Use only Kerosene or #1 Fuel Oil

Fuel Tank Capacity 30 Gallons / 113.5 Liters

Fuel Consumption:
(Gal. Per Hr / Liters Per Hr) 2.25 / 8.51

Fuel Pump Pressure 100 PSI

Motor 1725 RPM

Electric Requirements 115V / 60Hz

Amperage (Normal Run) 7.1

Spark Plug Gap 0.075"

Space Heater Weight - Dry
(Approximate Pounds /
Kilograms) 180 / 81.6

Space Heater Weight - Full Tank
(Approximate Pounds /
Kilograms) 390 / 176.9

RECORD SERIAL NUMBER

Write you model number, machine serial number and
date of purchase in the spaces provided below. Your
dealer needs this information when ordering parts.

Model No. ______________________________________________

Machine Serial No. _______________________________________

Date of Purchase ________________________________________
(To be filled in by purchaser)

Operator’s Manual 25

Wire Diagram

26 Operator’s Manual