Master MH-400T-KFA User Manual

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Page 1

Model Number

DANGER

MH-400T-KFA

KEROSENE FORCED AIR

HEATER

User’s Manual &

Operating Instructions

CONSUMER: READ AND SAVE THESE INSTRUCTIONS

IMPORTANT: Read and understand all of the directions in this manual before assembling,

starting, or servicing the heater. Improper use of this heater can cause serious injury. Keep this manual for future reference. The requirements of local authorities having jurisdiction shall be followed.

GENERAL HAZARD WARNING: Be sure to comply with the instructions and warnings provided with this heater, or death,

serious bodily injury and property loss, damage from the hazards of fire, explosion, burn,asphyxiation, and carbon monoxide poisoning can result. Only persons who can follow and understand these instructions should use or service this heater. If you need heater information such as an instruction manual, labels, etcetera, contact the manufacturer.

Not for use in residential living areas or in non-adequately ventilated

enclosed spaces. For outdoor use. Indoor use permitted for: The

temporary heating of adequately ventilated buildings or structures under construction, alteration or repair.

Fax: 320-251-2922 • Web: www.masterindustrialproducts.com • Email: info@pinnacleclimate.com

1 Industrial Blvd #101, Sauk Rapids, MN 56379 USA • Toll Free (800) 779-3267

Page 2

NEVER LEAVE HEATER UNATTENDED WHILE BURNING

WARNING

DANGER

CAUTION

DANGER

WARNING

OR WHILE CONNECTED TO A POWER SOURCE

Table of Contents

Safety Information ...................................................................... 2-3

Features ........................................................................................ 3

Specifications ................................................................................ 4

Unpacking...................................................................................... 5

Assembly .................................................................................... 5-6

Operation .................................................................................... 6-8

Maintenance ............................................................................. 9-11

Wiring Diagram ............................................................................ 11

Exploded View ............................................................................. 12

Parts List ..................................................................................... 13

Troubleshooting Guide ................................................................ 14

Warranty ...................................................................................... 15

FIRE, BURN, INHALATION AND EXPLOSION HAZARD. Keep com-

bustibles such as building materials, paper or cardboard a safe distance away from the heater as recommended by these instructions. Never use the heater in spaces which contain products such as gasoline, solvents, paint thinners, dust particles, volatile or airborne combustibles or any unknown chemicals. This is an unvented portable heater. It

uses air (Oxygen) from the area in which it is used. Adequate

combustion and ventilation air must be provided. Refer to “Ventilation” on page 7.

DO NOT OPERATE THIS HEATER

UNTIL YOU HAVE READ AND

THOROUGHLY UNDERSTAND THESE SAFETY AND OPERATING INSTRUCTIONS. Failure

to comply with the precautions and instructions provided with this heater can result in death, serious bodily injury, property loss or damage from the hazards of fire, soot production, explosions, burns, asphyxiation or carbon monoxide poisoning. Only persons who can read and understand these instructions should use or service this heater.

Safety Information

Indicates an imminently hazardous situation which, if not avoided, WILL result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, COULD result in death or serious injury.

Indicates a potentially hazardous situation which, if not avoided, MAY result in minor or moderate injury.

This is a kerosene direct-red, forced air heater. Kerosene forced

air heaters are primarily intended for use for temporary heating

of buildings under construction, alteration or repair. Direct-red

means that all of the combustion products of the heater enter the

heated space. This appliance is rated at 98% combustion efciency,

but does produce small amounts of carbon monoxide. Carbon monoxide is toxic.

CARBON MONOXIDE POISONING MAY LEAD TO DEATH!

Humans can tolerate small amounts of carbon monoxide, and precautions should be taken to provide proper ventilation. Failure to provide proper ventilation according to this manual can result in death. Early signs of carbon monoxide poisoning resemble the

u. Symptoms of improper ventilation are: Symptoms of improper

ventilation / carbon monoxide poisoning are:

Headache • Dizziness • Nausea • Dry Mouth Sore Throat •

Burning of Nose and Eyes

For optimal performance of this heater, it is strongly suggested that K-1 kerosene be used. K-1 kerosene has been refined to virtually eliminate contaminants, such as sulfur, which can cause a rotten egg odor during the operation of the heater. However, #1 or #2 fuel oil (diesel fuel) may also be used if K-1 kerosene is not available. Be advised that these fuels do not burn as clean as K-1 kerosene, and care should be taken to provide more fresh air ventilation to accommodate any added contaminants that may be added to the heated space. Use of #1 or #2 fuel oil may result in more periodic maintenance.

CALIFORNIA RESIDENTS: This product contains

chemicals, including lead, known to the State of California to

cause birth defects or other reproductive harm. Wash hands after handling.

MASSACHUSETTS RESIDENTS: Massachusetts

state law prohibits the use of this heater in any building which is used in whole or in part for human habitation. Use of this heating device in Massachusetts requires local fire department

permit (M.G.L.C. 148, Section 10A).

NEW YORK CITY RESIDENTS: The New York City

Fire Code prohibits the storage, handling and use of kerosene

fueled heaters for space heating. Any person violating that

provision may be punished by a fine up to $10,000 and a term of imprisonment of up to 6 months.

Risk of indoor air pollution!

- Use this heater only in well ventilated areas! Provide, at heater level, at least a three square foot (2,800 sq. cm) opening of outside air for every 100,000 BTU/hr of heater rating.

- People with breathing problems should consult a physician before using the heater.

- Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning resemble flu-like symptoms such as headaches, dizziness, and/or nausea. If you have these symptoms, your heater may not be working properly.

- Get fresh air at once! Have the heater serviced. Some people

are more affected by carbon monoxide than others. These include pregnant women, those with heart or lung problems, anemia, or those under the influence of alcohol, or at high altitudes.

Risk of burns / fire / explosion!

- NEVER use fuels such as gasoline, benzene, paint thinners,

crankcase drainings, or other oil compounds in this heater (RISK OF FIRE OR EXPLOSION).

Page 3

NEVER LEAVE HEATER UNATTENDED WHILE BURNING

WARNING

OR WHILE CONNECTED TO A POWER SOURCE

Safety Information (Continued)

- NEVER refill the heater’s fuel tank while heater is operating or still hot. This heater is EXTREMELY HOT while in operation.

- Keep all combustible materials away from this heater.

- NEVER block air inlet (rear) or air outlet (front) of heater.

- NEVER use duct work in front or at rear of heater.

- NEVER move or handle heater while still hot.

- NEVER transport heater with fuel in its tank.

- If equipped with a thermostat, the heater may start at any time.

- ALWAYS locate heater on a stable and level surface.

- ALWAYS keep children and animals away from heater.

- Bulk fuel storage should be a minimum of 25 ft. from heaters,

torches, portable generators, or other sources of ignition. All

fuel storage should be in accordance with federal, state, or local authorities having jurisdiction.

- Never use this heater in living or sleeping areas.

- NEVER use this heater where flammable vapors may be present.

Risk of electric shock!

- Use only the electrical power (voltage and frequency) specified on the model plate of the heater. Use only a three- prong, grounded outlet and extension cord.

- ALWAYS install the heater so that it is not directly exposed to

water spray, rain, dripping water, or wind.

- ALWAYS unplug the heater when not in use.

Minimum Clearance From Combustibles

MH-400T-KFA

Top

Sides

Front

4 ft. (125 cm)

8 ft. (250 cm)

Front Handle

Hot Air outlet

Safety Guard

Lower Shell

Drain Bolt

(Bottom-Front

of Fuel Tank)

Side Cover

Control Panel

Features

Extension Cord Wrap

Upper Shell

Fuel Cap

Fuel Gauge

Rear Handle

Fan Guard

Fuel Tank

Power Cord

Figure 1. Features of Model MH-400T-KFA

Page 4

NEVER LEAVE HEATER UNATTENDED WHILE BURNING

OR WHILE CONNECTED TO A POWER SOURCE

Unpacking

Remove the heater and all of the packaging materials from the shipping carton.

NOTE: Save the box and packaging materials for future storage.

Specications

36"

Check the diagram on the following page to be sure that you have all of the parts required to assemble your heater. If you find that any parts are missing, call 800-779-3267 for assistance in receiving the missing components.

MH-400T-KFA

L 53"

"03"35

Figure 2. Dimensions of Model MH-400T-KFA

W 30"

H 36"

Page 5

Model MH-400T-KFA

CAUTION

Wheel Yes

Wheels and Axle Yes

Wheel Caps No

Front Handle Yes

Rear Handle Yes

Cord Wraps Yes

Screws, Nuts, and Washers Yes

Cotter Pins and Bushings Yes

NEVER LEAVE HEATER UNATTENDED WHILE BURNING

OR WHILE CONNECTED TO A POWER SOURCE

Assembly

Wheels (Pneumatic)

Screws (L) Screws (S)

Cord Wraps

Nuts

Wheel Support Frame

Front Handle

Figure 3. Component Identication

TOOLS REQUIRED

• MEDIUM PHILLIPS SCREWDRIVER

• OPEN END OR ADJUSTABLE WRENCH

• LONG NOSE PLIERS

ASSEMBLING WHEEL & HANDLE

1. Slide axle through wheel support frame. Install wheel bushings, flat washers (S) and wheel on axle.

NOTE: When installing wheels, tube valve should face out from support frame (Figure 4).

2. Place flat washers (L) and cotter pins on axle ends and bend cotter pins with long nose pliers to secure.

Flat Washers (S)

Rear Handle

Axle

4. Place heater on wheel support frame. Make sure air inlet end

(rear) of heater is over wheels. Align the holes on fuel tank

flange. Insert screws through handles (front and rear), fuel tank flange, and wheel support frame as shown in Figure 4 and attach nut finger tight after each screw is inserted.

5. After all screws are inserted, tighten nuts firmly.

Do not operate heater without support frame fully assembled.

Flat Washers (L)Cotter PinsBushings

Page 6

NEVER LEAVE HEATER UNATTENDED WHILE BURNING

Fuel

Wheel

OR WHILE CONNECTED TO A POWER SOURCE

Operation

KEROSENE (K-1)

- NEVER store kerosene in the living space. Kerosene should be stored

in a well ventilated area outside the living area.

- NEVER use fuel such as, benzene, alcohol, white glass, camp stove

fuel, paint thinners, or other oil compounds in this heater. THESE ARE VOLATILE FUELS THAT CAN CAUSE A FIRE OR EXPLOSION.

- NEVER store kerosene in direct sunlight or near a source of heat.

- NEVER use kerosene that has been stored from one season to the

next. Kerosene deteriorates over time. OLD KEROSENE WILL NOT BURN PROPERLY IN THIS HEATER.

THE SAFETY SYSTEM Temperature Limit Control: This heater is equipped with a

Temperature Limit Control designed to turn the heater off should the internal temperature rise to an unsafe level. If this device activates and turns your heater off, it may require service. Once the temperature falls below the reset temperature, you will be able to start your heater.

Electrical System Protection: This heater’s electrical system is protected by a fuse that protects it and other electrical components from

damage. Fuse is located inside of an in-line “FUSE BARREL”. If your

heater fails to operate, check this fuse first and replace as needed.

Refer to Specification Chart on page 4.

Flame-Out Sensor: Utilizes a photocell to monitor the flame in burn chamber during normal operation. It will cause the heater to shut off should the burner flame extinguish.

FUELING YOUR HEATER

NEVER fill the heater fuel tank in the living space: fill the tank outdoors. Do not overfill your heater and be sure heater is leveled.

IMPORTANT: REGARDING FIRST IGNITION OF HEATER. The first time you light the heater, it should be done OUTDOORS. This allows

the oils, etc. used in manufacturing the heater to burn off outside.

- Use K-1 kerosene in this heater. A suitable substitute is #1 fuel.

OVERVIEW OF HEATER DESIGN Fuel System: This heater is equipped with an electric magnet

pump that forces fuel through the fuel line connected to the fuel intake, and then through a nozzle in the burner head. This fuel is then sprayed into the combustion chamber in a fine mist.

“SureFire Ignition”: The electronic ignitor sends voltage to a specially designed spark plug. The spark plug ignites the fuel and air mixture.

The Air System: The heavy duty motor turns a fan that forces air into and around the combustion chamber. Here, the air is heated and then forced out the front of the heater.

MH-400T-KFA 176°F / 80°C 149°F / 65°C

Safety Guard

Tank Flange

Support Frame

Wheel (Semi-Pneumatic)

Flat Washer (L)

Cotter Pin

Model Internal Shut-off Temp.

+/-10 Degrees

Cord Wrap

Screw (L)

Nut

Axle

Flat Washer (S)

Bushing

Figure 4. Wheel and Handle Assembly

Reset Temp.

+/-10 Degrees

Screw (S)

Air Inlet

Wheel Tube Valve

Page 7

NEVER LEAVE HEATER UNATTENDED WHILE BURNING

CAUTION

OR WHILE CONNECTED TO A POWER SOURCE

Operation (Continued)

VENTILATION

Risk of indoor air pollution. Use heater only in well ventilated areas.

Provide a fresh air opening of at least 3 square feet. (2,800 sq. cm.) for each 100,000 BTU/Hr. rating. Provide extra fresh air if more heaters are being used.

TO START HEATER

1. Fill fuel tank with K-1 kerosene.

2. Attach fuel cap.

3. Plug power cord into three-prong, grounded extension cord. Extension cord must be at least six feet long.

Extension Cord Wire Size Requirements:

• 6 to 10 feet long, use 14 AWG conductor.

• 101 to 200 feet long, use 12 AWG conductor.

• 201 to 300 feet long, use 10 AWG conductor.

• 301 to 400 feet long, use 8 AWG conductor.

• 401 to 500 feet long, use 6 AWG conductor.

4. Push “OPERATION BUTTON” (see Figure 5). Power indicator

lamp and room temperature display will light and heater will start. Push the up and down arrow keys on the control panel to adjust the thermostat settings.

If heater does not start, the thermostat setting may be too low.

Push “TEMP CONTROL UP ARROW” to higher setting to start

heater. If heater still does not start, see Troubleshooting Guide on page 14.

NOTE: The major electrical components of this heater are protected by a circuit breaker (fuse) mounted to the power switch. If

your heater fails to start, check this rst and replace as necessary.

You should also check your power source to insure that proper voltage and frequency are being supplied to the heater.

NEVER FILL THE FUEL TANK INDOORS. ALWAYS FILL THE

TANK OUTDOORS. BE SURE THAT THE HEATER IS ON LEVEL GROUND WHEN FUELING, AND NEVER OVERFILL THE FUEL TANK.

Temp Control Buttons

TO STOP HEATER

Never unplug heater while heater is running.

Heater must go through cooling cycle. The cooling cycle cools the combustion chamber.

Damage to heater can occur if combustion chamber is not cooled. Do not restart heater until cooling cycle is complete.

1. Push “OPERATION BUTTON” (see Figure 5). This will cause heater ame to go out. The motor will continue to run during the

cooling cycle. This allows the fan to cool the combustion chamber.

When the cooling cycle (approx. 2 minutes) is nished, the motor will stop. Do not unplug heater until cooling cycle is nished.

2. Disconnect heater from power source.

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 HEATER

DO NOT restart heater until cooling

cycle is nished.

The cooling cycle cools the combustion chamber.

1. Wait until cooling cycle is nished after stopping heater.

2. Repeat steps under TO START HEATER.

LONG-TERM STORAGE OF HEATER

1. Remove drain nut from rear bottom side of fuel tank by un-

screwing nut and drain. See Figure 6 on page 8.

2. Using a small amount of kerosene, swirl and rinse the inside of the tank.

NEVER MIX WATER WITH KEROSENE, as it will cause rust

inside the tank. Pour the kerosene out, making sure that you remove it all.

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

3. Reinstall drain bolt as follows:

i. Insert bolt’s seal head fully into drain hole so that ange is

ush to tank’s bottom. See Figure 6.

ii. Insert seal cap fully into head hole so that cap ange is ush

to head ange. See Figure 6.

Operation

Button

Figure 5. Control Panel

Page 8

NEVER LEAVE HEATER UNATTENDED WHILE BURNING

(Bottom-Front of Fuel Tank)

WARNING

OR WHILE CONNECTED TO A POWER SOURCE

Operation (Continued)

Drain Bolt

Drain Nut

Maintenance

Never service heater while it is plugged in or while hot!

NOTE: USE ORIGINAL EQUIPMENT REPLACEMENT PARTS.

Use of third-party or other alternate components will void warranty and may cause unsafe operating conditions.

FUEL TANK

- Flush every 200 hours of operation or as needed (see Long-

Term Storage of Heater, page 7).

FAN BLADES

CLEAN EVERY SEASON OR AS NEEDED.

1. Remove upper shell.

2. Use Allen wrench to loosen set screw which holds fan blade to

motor shaft.

3. Slip fan blade off motor shaft.

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

solvent.

5. Dry fan blade thoroughly.

6. Reinstall fan blade to motor shaft.

7. Place fan hub ush with end of motor shaft.

8. Place set screw on at end of shaft.

9. Tighten screw rmly (40-50 inch pounds/ 4.5-5.6 N-m). Rein-

stall upper shell

Drain Bolt

Figure 6. Drain Bolt Reinstall

IMPORTANT: Reinstall bolt fully into hole in tank; otherwise it will

not seal completely.

- Make sure storage place is free of dust and corrosive fumes.

- Store the heater in the original box with the original packing material and keep the USER’S MANUAL with heater.

NOZZLE

Remove dirt in nozzle as needed (see page 9).

1. Remove upper shell.

2. Remove fuel line B from burner assembly by using wrench.

3. Remove burner head from burner assembly.

4. Remove lead wire from spark plug.

5. Remove spark plug from burner head.

6. Carefully remove nozzle from burner head using socket wrench.

7. Blow compressed air through face of nozzle (This will remove any dirt).

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

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

10. Reinstall nozzle into burner head and tighten rmly (175-200

inch-pounds).

11. Reinstall spark plug in burner head.

12. Attach burner head to combustion chamber (directions

continued on next page).

Page 9

Nozzle

Photocell

Plug

Photocell

NEVER LEAVE HEATER UNATTENDED WHILE BURNING

OR WHILE CONNECTED TO A POWER SOURCE

Maintenance (Continued)

PHOTOCELL

CLEAN PHOTOCELL ANNUALLY OR AS NEEDED.

1. Remove upper shell.

2. Remove fan (see FAN BLADES, page 8).

3. Remove photocell from its mounting bracket

4. Clean photocell lens with cotton swab.

TO REPLACE: 1. Remove side cover near Operation switch.

2. Disconnect wires from Operation switch and remove photocell.

3. Disconnect wires from circuit board and remove side cover.

4. Install new photocell and attach wires to circuit board.

5. Replace switch wires to operation switch and side cover.

6. Replace fan and upper shell.

Figure 7. Nozzle Replacement

NOZZLE (Continued)

13. Attach spark plug wire to spark plug

14. Attach fuel line to burner head and tighten rmly.

15. Replace upper shell.

16. Attach ignitor wire to spark plug.

17. Attach fuel and air line hoses to burner head.

18. Reinstall fan blade and upper shell.

Nozzle

Figure 8. Nozzle

Spark Plug

Nozzle

Figure 9. Spark Plug Replacement

Spark

Figure 10. Photocell Lead Wire

SPARK PLUG

CLEAN AND REGAP EVERY 600 HOURS OF OPERATION OR REPLACE AS NEEDED.

1. Remove upper shell.

2. Remove spark plug wire from spark plug (see Figure 9).

3. Remove spark plug from burner head using medium Phillips screwdriver.

4. Clean and regap spark plug electrodes to 3.5 mm gap (+/-

0.5mm).

5. Reinstall spark plug into burner head.

6. Attach spark plug wire to spark plug.

7. Reinstall upper shell.

Figure 11. Photocell Replacement

Page 10

NEVER LEAVE HEATER UNATTENDED WHILE BURNING

OR WHILE CONNECTED TO A POWER SOURCE

Maintenance (Continued)

FUEL FILTER

CLEAN TWICE PER HEATING SEASON OR AS NEEDED.

Fuel lter A on fuel cap (see Figure 12)

1. Remove fuel cap.

2. Take out fuel lter with clean kerosene.

3. Wash fuel lter with clean kerosene.

4. Replace fuel lter on fuel tank.

5. Replace fuel cap on fuel tank.

Fuel lter B on fuel line (see Figure 12)

1. Remove fuel line A from fuel pump by using wrench.

2. Take out fuel line from fuel tank by pulling out fuel lter gasket.

3. Remove fuel lter assembly from fuel line

4. Wash fuel lter in clean kerosene.

5. Reassemble fuel lter in reverse order. Use of diesel may require additional maintenance. Improper

maintenance can lead to poor combustion and soot production.

6. Stop heater (see OPERATION, page 7).

7. If accessory pressure gauge is being used, remove pressure gauge.

8. Plug in end of lter cover, and replace air vent screw and panel..

NOTE: If heater does not ignite when heater is turned on, please

turn AIR VENT SCREW counter clockwise to release air, then turn OPERATION SWITCH back on.

NOTE: An accessory service fuel pressure gauge is available for

accurate fuel pressure testing. Please call 1-800-779-3267 for more information.

Pressure Adjusting Screw

Fuel Cap

Fuel Line A

Fuel Line

Fuel Cap Gasket

A Gasket

Fuel Filter A

Fuel Filter B

Figure 12. Remove Tank Fuel Filter

PUMP PRESSURE ADJUSTMENT

1. Remove right side panel. (If not using an accessory fuel pressure gauge, please skip to #4)

2. Remove air vent screw.

3. Insert accessory fuel pressure gauge at outlet of air vent screw.

4. Adjust pump pressure by turning pressure adjusting screw. See

Figure 13. i. Turn pressure adjusting screw clockwise to increase pressure. ii. Turn pressure adjusting screw counterclockwise to decrease

pressure.

5. Set pump pressure to 125 PSI (+/- 6 PSI).

We do not recommend adjusting the pump pressure if the red markings on the pump body and pressure adjusting screw are aligned with each other.

NOTE: Use only original equipment replacement parts. Use of

alternate or third party components will void any warranty and may cause unsafe operating conditions.

Air Vent Screw

Figure 13. Pump Pressure Adjustment

AIR BLEED DIRECTIONS

If your heater fails to ignite, having air trapped in the fuel pump

may be the cause. Air in the fuel pump will cause ignition failure

and is often accompanied by a loud “grinding” or vibrating sound being made by the fuel pump. This heater is designed to easily remove any air in the fuel pump by simply following the air bleeding procedure below:

1. Fill fuel tank with K-1 kerosene. Turn the Air Vent Screw 3 full

turns counterclockwise from the factory closed / fully clockwise

position. (This will allow air to escape during operation). See

Figure 14.

2 Start the ignition sequence by following the standard ignition

procedures outlined on page 6 (directions continued on next page).

Figure 14. Opening Air Vent Screw

Page 11

NEVER LEAVE HEATER UNATTENDED WHILE BURNING

OR WHILE CONNECTED TO A POWER SOURCE

Maintenance (Continued)

AIR BLEED DIRECTIONS (Continued)

3. Allow the heater to attempt ignition for 3-5 seconds, during

which time you may hear a loud “grinding” or vibration sound.

4. If your heater has not ignited, re-start the ignition sequence.

Once the heater has ignited, turn the Air Vent Screw clockwise until fully hand-tightened. See Figure 15. Any air trapped in the

fuel pump will have been purged.

5. Your heater is now ready for operation.

6. Re-ll your heater with fuel before it runs out. This will prevent

the fuel lines and fuel pump from drawing in air and having to go through the air bleeding procedure again.

Wiring Diagram

Figure 15. Tightening Air Vent Screw

Page 12

NEVER LEAVE HEATER UNATTENDED WHILE BURNING

OR WHILE CONNECTED TO A POWER SOURCE

Exploded View

Page 13

NEVER LEAVE HEATER UNATTENDED WHILE BURNING

OR WHILE CONNECTED TO A POWER SOURCE

Parts List

# Description MH-400T-KFA

1 PCB Assembly 70-027-0800

2 Fuel Cap Assembly 70-006-0200

3 Pneumatic Wheel 70-041-0110

4 Photocell 70-016-0150

5 Nozzle 70-015-0750

6 Fan Assembly 70-024-0700

Page 14

Problem Possible Cause Solution

Heater Ignites, but main PCB shuts off after a short period of time.

Lamp ickers and LED display

shows “E1”.

Heater will not operate or motor runs for a short time.

Lamp ickers and LED display

shows “E1”.

Fan does not operate when heater is plugged in and power switch is in the “ON” position. The lamp is

ickering or and LED display shows

“E1” or “E2”.

Lamp is ickering and LED display

shows “E3”.

Lamp is ickering and LED display

shows “E4”.

NEVER LEAVE HEATER UNATTENDED WHILE BURNING

OR WHILE CONNECTED TO A POWER SOURCE

Troubleshooting Guide

1. Incorrect pump pressure.

2. Dirty fuel lter.

3. Nozzle is dirty.

4. Photocell lens is dirty.

5. Photocell not installed properly..

6. Improper electrical connection between main PCB and photocell.

7. Photocell is defective

1. No kerosene in the fuel tank.

2. Incorrect pump pressure.

3. Corroded spark plug or incorrect plug gap.

4. Dirty fuel lter.

5. Dirty nozzle.

6. Moisture in fuel tank.

7. Improper electrical connection between transformer and circuit board.

8. Ignitor wire not connected to spark plug.

9. Defective ignitor.

10. Air in fuel line

1. Thermostat is set too low.

2. Broken electrical connection between main PCB and motor.

1. Thermostat switch has failed.

2. Short circuit

1. Sensor disconnected 1. Check limit control thermostat and/

1. Adjust pump pressure (see page 10).

2. Clean / replace fuel lter (see page 10).

3. Clean / replace Nozzle (see page 8).

4. Clean / replace photocell (see page 9).

5. Adjust photocell position (see page 9).

6. Check wiring connections (see wiring diagram on page 11).

7. Replace photocell (see page 9).

1. Fill tank with fresh kerosene.

2. Adjust pump pressure (see page 10).

3. Clean / replace spark plug (see page 9).

4. Clean / replace fuel lter (see page 10).

5. Clean / replace nozzle (see page 8).

6. Rinse fuel tank with clean, fresh kerosene (see page 7).

7. Inspect all electrical connections (See wiring diagram on page 11).

8. Re-attach ignitor wire to spark plug (see page 9).

9. Replace ignitor.

10. See air bleed directions, page 10.

1. Rotate thermostat to a higher setting

2. Inspect all electrical connections (see wiring diagram on page 11).

1. Replace thermostat switch (see wiring diagram on page 11).

2. Inspect all electrical connections (see wiring diagram on page 11).

or check sensor connection

Lamp is ickering and LED display

shows “E5”.

Master MH-400T-KFA User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual