Desa Tech AC100LP, AC155LP Owner's Manual

AC-155LP
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.

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.

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.

The heater is designed for use as a construction heater in
accordance with ANSI Z83.7/CGA 2.14. Other standards
govern the use of fuel gases and heating products for
specific uses. Your local authority can advise you about
these. The primary purpose of construction heaters is to
provide temporary heating of buildings under construction,
alteration or repair. Properly used, the heater provides
safe economical heating. Products of combustion are
vented into the area being heated.

We cannot foresee every use which may be made of our
heaters. Check with your local fire safety authority if

you have questions about heater use.

Other standards govern the use of fuel gases and
heat producing products for specific uses. Your local
authorities can advise you about these.

Propane gas is odorless. An odor-making agent is added
to propane gas. The odor helps you detect a propane
gas leak. However, the odor added to propane gas can
fade. Propane gas may be present even though no
odor exists.

Install and use heater with care. Follow all local
ordinances and codes. In the absence of local
ordinances and codes, refer to the Standard for Storage

and Handling of Liquefied Petroleum Gas, ANSI/NFPA
58 and the Propane Installation Code, CAN/CGA
B149.2. This instructs on the safe storage and handling

of propane gases.

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

2 Operator’s Manual

Contents

Page

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

Controls ................................................................... 9

Preparation ............................................................... 10

Installation ................................................................ 12

Operation ................................................................ 12

Troubleshooting

Service .................................................................... 16

Storage .................................................................... 17

Specifications ......................................................... 18

Wire Diagram ............................................................ 19

Warr

anty .................................................................. 20

Notes ........................................................................ 21

..................................................... 14

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

ELECTRICAL HAZARDS

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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. The electrical connections and grounding of the heater shall
follow the National Electric Code, ANSI/NFPA 70 or the Canadian
Electrical Code, Part 1.

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, canopy-like 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.

IMPORTANT SAFETY INSTRUCTIONS

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: 2 Ft. (60.96 cm), Top: 6 Ft. (1.83 m), Rear:
2 Ft. (60.96 cm)

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 without 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.

6 Operator’s Manual

IMPORTANT SAFETY INSTRUCTIONS

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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 Propane / L.P. gas set up for vapor withdrawal.

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

19. Do not use heater in basement or below ground level. Propane / L.P.
gas is heavier than air. If a leak occurs, Propane / L.P. gas will sink
to the lowest possible level.

20. Keep heater at least six feet from Propane / L.P. tank(s). Do
not point heater at Propane / L.P. tank(s) within 20 feet.

21. Keep Propane / L.P. tank(s) below 100° F (37.8° C).

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

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

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

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

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

27. Do not use heater if altered.

28. Turn off Propane / L.P. supply to heater when not in use.

29. Use only original replacement parts. This heater must use design­ specific parts. Do not substitute or use generic parts. Improper
replacement parts could cause serious or fatal injuries.

SAVE THESE INSTRUCTIONS

Operator’s Manual 7

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.

8 Operator’s Manual

CONTROLS

A

B

C

D

E

F

G

H

I

J

AC-155LP

Controls

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

D -- Fan Guard
E -- Power Cord
F -- Thermostat Knob

G -- Hose / Regulator Assembly
H -- Inlet Connector
I -- On / Off Switch
J -- Lower Shell

Operator’s Manual 9

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.

Provide a fresh air opening of at least three square feet for
each 100,000 Btu/Hr rating. Provide extra fresh air if more
heaters are being used.

PROPANE SUPPLY

Propane / L.P. gas and Propane / L.P. tank(s) are to be
furnished by the user.

Use this heater only with a propane vapor withdrawal
supply system. See Chapter 5 of the Standard for Storage

and Handling of Liquefied Petroleum Gas, ANSI/NFPA 58

and the Propane Installation Code CAN/CGA B149.2. Your
local library or fire department will have this booklet.

The amount of Propane / L.P. gas ready for use from
Propane / L.P. tanks varies. Two factors decide this amount:

1. The amount of Propane / L.P. gas in tank(s)

2. The temperature of tank(s)
The chart below shows the number of 100 pound (45 kg)

tanks needed to run this heater. Smaller tanks can be used
for limited run times but it is recommended to use larger
tanks for optimum performance.

Temperature at Tank # of 100 lbs. Tanks

32°F (0°C) to 20°F (-6.7°C) 2
20°F (-6.7°C) to -10°F (-23.3°C) 3
Below -10°F (-23.3°C) (Use larger tank)

Less gas is vaporized at lower temperatures. You may need
two or more 100 pound (45 kg) tanks or one larger tank in
colder weather. Your local Propane / L.P. gas dealer will
help you select the proper supply system. The minimum
surrounding air temperature rating for each heater is -20°
F (-29° C).

10 Operator’s Manual

Preparation

Air For Combustion
And Heating

Fuel

Combustion Chamber

Ignitor

Clean
Heated
Air Out
(Front)

Cool
Air In
(Back)

Fan

Motor

Power Cord

Hose/
Regulator
Assembly

Solenoid Valve

On/Off Switch

DSI

Nozzle

THEORY OF OPERATION

The Fuel System: The hose / regulator assembly attaches to the Propane / L.P. gas supply. The Propane / L.P.

gas moves through the solenoid valve and out the nozzle.

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 direct spark ignitor (DSI) sends voltage to the spark plug/ignitor. The spark plug / ignitor
ignites the fuel and air mixture.

The Safety Control System: This system causes the heater to shut down if the flame goes out.

Operator’s Manual 11

Installation

Propane
Tank

Hose

Regulator

Vent
(pointing
down)

POL
Fitting

Supply
Valve

Hose

Inlet Connector

INSTALLATION

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.

WA RN I NG: TEST ALL GAS PIP ING AND
CONNECTIONS FOR LEAKS AFTER
INSTALLING OR SERVICING. NEVER
USE AN OPEN FLAME TO CHECK FOR
A LEAK. APPLY A MIXTURE OF LIQUID
SOAP AND WATER TO ALL JOINTS.
BUBBLES FORMING SHOW A LEAK.
CORRECT ALL LEAKS AT ONCE.

1. Provide propane supply system (see Propane Supply
section).

2. Connect POL fitting on hose / regulator assembly
to Propane / L.P. tank(s). (Fig. 1) Turn POL fitting
counterclockwise into threads on tank. Tighten firmly
using wrench. Tighten regulator with vent pointing
down.

3. Connect hose to inlet connector. Tighten firmly using a
wrench. (Fig. 2)

IMPORTANT: Extra hose or piping may be used if needed.

Install extra hose or piping between hose/regulator
assembly and Propane / L.P. tank. You must use the
regulator supplied with heater.

4. Open propane supply valve on Propane / L.P. tank(s)
slowly.

Note: If not opened slowly, excess-flow check valve on

Propane / L.P. tank will stop gas flow. If this happens,
close propane supply valve and open again slowly.

5. Check all connections for leaks.

6. Close propane supply valve.

(Fig. 1)

(Fig. 2)

OPERATION

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.

2. Place the space heater in an area that provides

3. Locate heater on stable and level surface. Make sure

4. Plug power cord of heater into a three-prong, grounded

12 Operator’s Manual

Operation

Follow all ventilation and safety information.

maximum circulation of the heated air. Follow all location
requirements noted in the Safety Information.

strong drafts do not blow into front or rear of heater.

extension cord. Extension cord must be at least 6
feet (1.83 m) long, UL listed and of a proper size. See
Extension Cord Chart.

Extension Cord Size Requirement

Length of Cord: Rated Cord:
Up to 50 feet (15 m) 18 AWG
51 to 100 feet (15.5 to 30.48 m) 16 AWG
101 to 200 feet (30.78 to 60.96 m) 14 AWG

Operation

OPERATION

5. Plug extension cord into a 120 volt/60 hertz, 3-hole,
grounded outlet.

6. Open propane supply valve on Propane / L.P. tank(s)
slowly.

Note: If not opened slowly, excess-flow check valve on

Propane / L.P. tank will stop gas flow. You may hear a click
from the excess-flow check valve closing. If this
happens, reset the excess-flow check valve by closing
propane supply valve and open again slowly.

7. Turn thermostat control knob fully counterclockwise to
the "cooler" position. Turn ON/OFF switch to the ON
position. Turn thermostat control knob slowly clockwise
until electric motor and fan begin to run. Heater will start
in approximately 3 seconds. Adjust thermostat control
knob to warmer or cooler setting as needed.

Note: If heater does not start after 3 seconds, the ignition

control will automatically attempt to start heater one time.
If heater fails to start on this attempt, the safety control
will "lock out" and no further automatic restarts will be
attempted. This could occur if air remains in fuel line. If
heater fails to start on this attempt, turn ON/OFF switch
to OFF position. Wait ten seconds for safety control to
reset, then turn ON/OFF switch back to ON position and
try to start heater again.

8. Thermostat Operation Only: During normal thermostat
operation, heater will cycle off when air temperature
rises to thermostat setting. When air temperature drops
sufficiently below thermostat setting, the electric motor
and fan will begin to run. After 15 to 60 seconds, heater
burner should automatically ignite and provide heat to
maintain temperature setting.

STOP SPACE HEATER:

1. Tightly close propane supply valve on Propane / L.P.
tank(s).

2. Wait a few seconds. Heater will burn gas left in supply
hoses.

3. Turn ON/OFF switch to the OFF position.

4. Unplug heater.

Operator’s Manual 13

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

Fan does not turn when heater
is plugged in.

Heater will not ignite.

No electrical power to heater.

Fan hitting inside of heater shell.

Fan blades bent.

Defective motor.

User did not follow installation or
operation instructions properly.

Check voltage to electrical outlet. If volt­age is good, check heater power cord
for breaks.

Adjust motor / fan mount to keep fan
from hitting inside of heater shell.

Replace fan.

Replace motor.

Repeat installation and operation
instructions.

No spark at ignitor. To test for
spark, see "Maintenance: Ignitor"
and follow step 8. If you see spark
at ignitor, have heater serviced by
qualified service person. If no spark
seen:

a. Loose or disconnected ignitor
wire

b. Wrong spark gap

c. Bad ignitor electrode

d. Bad spark transformer

a. Check ignitor wire. Tighten or reattach
loose ignitor wire. See "Maintenance:
Spark Transformer" for ignitor wire
location

b. Set gap between ignitor electrode and
nozzle to .13"/.15" (3.3/3.8 mm)

c. Replace ignitor electrode. See
"Maintenance: Ignitor".

d. Replace spark transformer. See
"Maintenance: Spark Transformer".

14 Operator’s Manual

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 shuts down while

running.

Propane / L.P. supply may be
inadequate.

High surrounding air temperature
causing thermal limit device to shut
down heater.

Restricted air flow.

Damaged fan.

Excessive dust or debris in
surrounding area.

WARNING: Use only in areas free

a. Refill tank
b. Provide additional and/or larger
tanks. See "Preparation: Propane
Supply".

This can happen when running heater
in temperatures above 85° F (30° C).
Run heater in cooler temperatures.

Check heater inlet and outlet. Re­move any obstructions.

Replace fan. See "Maintenance:
Fan".

Clean heater. See "Maintenance".

of high dust content.

Heater producing odor.

Gas leak.

Heater operating on a 20 lb.
Propane / L.P. cylinder. Insufficient
Propane / L.P. gas will be supplied
by a 20 lb. cylinder resulting in odor.

Propane / L.P. supply tank is "freez
ing up". Evaporation and consump­tion rate of Propane / L.P. from
supply tank is to great for the size of
the tank and air temperature.

Check all connections for leaks. Apply
mixture of liquid soap and water to
gas joints. Bubbles forming show a
leak that must be corrected

To obtain correct mixture of Propane /
L.P. gas and air, use a larger cylinder
size, i.e. 100 lb. See "Preparation:
Propane Supply".

Use a larger supply cylinder size,

­i.e. 100 lb.

Operator’s Manual 15

Service

MAINTENANCE:

WARNING: TO AVOID RISK OF BURN AND
ELECTRICAL SHOCK, NEVER ATTEMPT
TO SERVICE SPACE HEATER WHILE IT IS
PLUG G ED I N, OP ER AT I NG , 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. Check connections
for leaks. Apply mixture of liquid soap and water to
connections. Bubbles forming show a leak. Correct
all leaks at once.

3. Inspect hose / regulator assembly before each use. If
hose is highly worn or cut, replace with hose specified
by manufacturer.

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

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

6. Clean fan blades each season or as needed.

WARNING: NEVER SERVICE HEATER WHILE
IT IS P LUG GE D IN , CO N NE CTE D TO
P RO PA NE SU P PLY, OP E RAT I NG OR
HOT. SEVERE BURNS AND ELECTRICAL
SHOCK CAN OCCUR.

UPPER SHELL REMOVAL:

1. Remove screws along each side of heater using 5/16"

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

2. Lift or slide upper shell off.

3. Remove fan guard.

(Fig. 3)

16 Operator’s Manual

Service

Fan

Motor

Motor
Shaft

Fan

Setscrew

Fan

Hub

Setscrew

Motor
Shaft

MAINTENANCE (CONTINUED):

:

FAN

IMPORTANT: Remove fan from motor shaft before
removing motor from heater. The weight of the motor
resting on the fan could damage the fan pitch.

1. Remove upper shell.

2. Use 1/8" hex wrench to loosen setscrew which holds
fan to motor shaft.

3. Slip fan off motor shaft. (Fig. 4 & 5)

4. Clean fan using soft cloth moistened with kerosene or
solvent.

5. Dry fan thoroughly.

6. Replace fan on motor shaft. Make sure setscrew is
touching back of flat surface on motor shaft (Fig. 6).

7. Place setscrew on flat of shaft. Tighten setscrew firmly
(40-50 inch-pounds).

8. Replace fan guard and upper shell.

(Fig. 4)

(Fig. 5)

IGNITOR:
Make sure gap between ignitor electrode and burner
nozzle is 0.13/0.15". Access ignitor electrode from inside
combustion chamber. No other maintenance is needed
for ignitor.

(Fig. 6)

Storage

CAUTION: DISCONNECT HEATER FROM

PROPANE L.P. SUPPLY TANK(S).

1. Store Propane / L.P. tank(s) in safe manner. See Chapter
5 of Standard for Storage and Handling of Liquefied

Petroleum Gases, ANSI/NFPA 58
Installation Code CAN/CGA B149.2. Follow all local

codes. Always store Propane / L.P. tanks outdoors.

2. Place plastic cover caps over brass fittings on inlet
connector and hose / regulator assembly.

3. Store in dry, clean and safe place. Do not store
hose / regulator assembly inside heater combustion
chamber.

4. When taking heater out of storage, always check inside
of heater. Insects and small animals may place foreign
objects in heater. Keep inside of heater free from
combustible and foreign objects.

Operator’s Manual 17

and the Propane

Specifications

ITEM SPECIFICATION

Model Size AC-155LP

Output Rating (BTU / Hr) 150,000

Fuel Propane Vapor Only

Fuel Consumption:
(Gal. Per Hr / Liters Per Hr) 1.6 / 6.1
(Pounds Per Hr / Kilograms Per Hr) 7.0 / 3.2

Supply Pressure to Regulator:
Minimum (for input adjustment) 10 PSI / 65.98 kPa
Maximum Tank Pressure

Regulator Outlet Pressure Factory Preset @ 12.5" WC / 31.8 cm

Manifold Pressure 9.8" WC / 24.9 cm

Hot Air Output (Approx.) 550 CFM / 15.6 cubic meter / minute

Motor RPM 3450

Motor HP 1/8

Electric Input 120V / 60Hz

Amperage (Normal Run) 2.2

Ignition Electronic Direct Spark, D.S.I.

Ignitor Gap 0.13 in / 0.15 in (3.3 mm / 3.8 mm)

Shipping Weight
(Approximate Pounds /
Kilograms) 35 / 15.9

Space Heater Weight
(Approximate Pounds /
Kilograms) 27 / 12.2

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)

18 Operator’s Manual

Electrical Connection Diagram

Electrical Ladder Diagram

Wire Diagram

Operator’s Manual 19

STATEMENT OF WARRANTY

John Deere warrants all parts, (except those referred to below), of your new space heater
to be free from defects in materials and workmanship during the following periods:

For One (1) Year from the date of original purchase.

Defective parts not subject to normal wear and tear will be repaired or replaced at
our option during the warranty period. In any event, reimbursement is limited to the
purchase price paid.

EXCLUSIONS

1. This warranty does not cover parts damaged due to normal wear, misapplication,
misuse, operation at other than recommended. Failure to follow recommended
operating and maintenance procedures also voids warranty.

2. The use of other than genuine manufacturer repair parts will void warranty.

3. Warranty will be void if used in any application other than consumer / homeowner.
Parts returned, prepaid to our factory or to an Authorized John Deere Service Center
will be inspected and replaced free of charge if found to be defective and subject
to warranty. There are no warranties which extend beyond the description of the
face hereof. Under no circumstances shall the manufacturer bear any responsibility
for loss of use of the unit, loss of time or rental, inconvenience, commercial loss or
consequential damages.

For Service or Warranty Consideration, contact

Mi-T-M

®

Corporation, 8650 Enterprise Drive, Peosta, IA 52068

1-877-JD-KLEEN / (1-877-535-5336) Fax [phone]

Monday - Friday 8:00 a.m. - 5:00 p.m. CST

20 Operator’s Manual