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© 2017, Pinnacle Climate Technologies, Inc. 

Kerosene Radiant Heater User’s Manual 

NEVER LEAVE HEATER UNATTENDED WHILE BURNING 

OR WHILE CONNECTED TO A POWER SOURCE

10

Troubleshooting Guide: 70-SS / 125-OFR

Problem

Possible Cause

Solution

Heater fires, but shuts down after a 

short period of time. 

1. Dirty Fuel Filter.

2. Nozzle Dirty.

3. Photocell Dirty.

4. Photocell not installed properly.

5. Photocell Defective .

6. Improper electrical connec-

tion between Circuit Board and 

Photocell.

7. Cooling Fan is obstructed

8. Improper pressure.

1. Clean/replace Fuel Filter.

2. Clean/replace Nozzle 

3. Clean/replace Photocell .

4. Adjust Photocell position.

5. Replace Photocell.

6. Check wiring connections (See 

Wiring Diagrams, Page 11).

7. Check to be sure cooling fan is not 

obstructed.

8. Adjust pump pressure.

Heater will not operate, or motor 

runs for short time.

1. No Kerosene/ diesel in fuel tank.

2. Corroded Spark Plug or incorrect 

plug gap.

3. Dirty Fuel Filter.

4. Dirty Nozzle.

5. Moisture in Fuel/Fuel Tank.

6. Improper electrical connection 

between Transformer and Circuit 

Board.

7. Transformer Wires not connected to 

Spark Plug.

8. Defective Transformer.

1. Fill tank with fresh Kerosene/ diesel.

2. Clean/replace Spark Plug.

3. Clean/replace Fuel Filter.

4. Clean/replace Nozzle.

5. Rinse out fuel tank with clean fresh 

Kerosene/ diesel.

6. Inspect all electrical connections. 

(See Wiring Diagrams, Page 11).

7. Re-attach Transformer wires to 

Spark Plug.

8. Replace Transformer.

Fan does not operate when heater 

is plugged in and Operating Switch 

is in the “ON” position.

1. Broken electrical connection 

between Circuit Board and motor.

2. Not enough amps available to power 

heater.

1. Inspect all electrical connections on 

Wiring Diagrams (Page 11).

2. Use a new extension cord or try 

another electrical socket.

Heater makes grinding noise.

1. Air in fuel pump.

1. Sound will stop after 3 seconds.  If 

grinding sound continues, add fuel to 

tank.

Heater does not turn on and the 

lamp is not lit.

1. Temperature limit sensor has over-

heated.

2. No electrical power.

3. Fuse break down.

4. Improper electrical connection 

between Temperature Limit Sensor 

and Circuit Board.

1. Push Operating Switch to “OFF” and 

allow heater to cool for 5 minutes. 

Push Operating Switch back to “ON”.

2. Check power cord and extension 

cord to insure of proper connection. 

Test power supply.

3. Check/replace Fuse.

4. Inspect all electrical connections. 

(See Wiring Diagrams, Page 11).

Poor combustion and / or soot 

production.

1. Pump Pressure.

2. Poor fuel quality.

1. Be sure pump pressure is adjusted 

correctly.

2. Be sure Kerosene/ diesel is not old 

or contaminated.

Summary of Contents for MASTER MH-125-OFR-A

Page 1: ...Safety Information FIRE BURN INHALATION AND EXPLOSION HAZARD Keep combustibles such as building materials paper or cardboard a safe distance away from the heater as recommended by these instruc tions...

Page 2: ...for temporary heating of buildings under construction alteration or repair Direct fired means that all of the combustion products of the heater enter the heated space This appliance is rated at 98 com...

Page 3: ...use with an external fuel tank Keep all combustible materials away from this heater Minimum Clearance From Combustibles 70 SS 125 OFR Top 4 ft 125 cm 6 ft 185 cm Sides 4 ft 125 cm 6 ft 185 cm Front 8...

Page 4: ...EAVE HEATER UNATTENDED WHILE BURNING OR WHILE CONNECTED TO A POWER SOURCE 3 Features FUEL PRESSURE GAUGE BEHIND REMOVABLE COVER 70 SS 125 OFR Top Safety Guard Radiant Cone Front Safety Guard Radiant V...

Page 5: ...iver Figure 1 Figure 2 Attach the handle while still in the box for easier unpacking see Figure 2 Carry Handle 1 Black Screws 2 Step 1 Remove existing screws from shell ring on either side of heater s...

Page 6: ...attach wheels washers and nuts see Figure 6 2 Place main structure on wheel frame and fasten with long screws provided see Figure 7 3 Attach safety guard to front of heater with screws provided see F...

Page 7: ...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 NOTE...

Page 8: ...heater fails to ignite check this fuse first and replace if necessary Also check the power source to be sure the proper voltage is being provided to the heater 1 Complete steps 1 3 above 2 Push the p...

Page 9: ...ush with water use fresh Kerosene only SPARK PLUG Clean and re gap every 600 hours of operation or replace as needed After removing the Spark Plug clean the terminals with a wire brush Re gap the term...

Page 10: ...n clean Kerosene or diesel to help loosen any particles see Figure 14a and 14b PHOTOCELL The photocell should be cleaned at least once per heating season or more depending on conditions Use a cotton s...

Page 11: ...Spark Plug 3 Clean replace Fuel Filter 4 Clean replace Nozzle 5 Rinse out fuel tank with clean fresh Kerosene diesel 6 Inspect all electrical connections See Wiring Diagrams Page 11 7 Re attach Transf...

Page 12: ...imate Technologies Inc Kerosene Radiant Heater User s Manual NEVER LEAVE HEATER UNATTENDED WHILE BURNING OR WHILE CONNECTED TO A POWER SOURCE 125 OFR 11 Wiring Diagram AC 120V 60Hz AC 250V 3 15A ELECT...

Page 13: ...es Inc Kerosene Radiant Heater User s Manual NEVER LEAVE HEATER UNATTENDED WHILE BURNING OR WHILE CONNECTED TO A POWER SOURCE Exploded View 12 25 23 24 9 21 22 20 19 26 10 7 28 6 4 3 1 2 27 8 12 13 29...

Page 14: ...0 9 Ignitor 75 025 0120 10 Main PCB Assembly 75 025 0400 11 Tip Over Sensor 75 051 0200 12 Cooling Motor Assembly 75 047 0250 13 Cooling Fan 75 047 0200 14 Handle 75 001 0060 15 Temperature Limit Swit...

Page 15: ...Kerosene Radiant Heater User s Manual NEVER LEAVE HEATER UNATTENDED WHILE BURNING OR WHILE CONNECTED TO A POWER SOURCE 1 2 4 3 5 6 7 8 9 10 11 12 13 14 15 16 17 18 24 20 22 21 30 23 26 19 34 27 29 42...

Page 16: ...p 72 027 0100 11 Main PCB and Fuse 72 025 0450 12 Tip Over Sensor 75 051 0200 13 Power Cord 72 032 0150 14 Power Switch 72 012 0120 15 Back Cover 72 013 0110 16 Panel sub PCB 72 014 0100 17 Blower Mot...

Page 17: ...If Pinnacle Climate Technnologies Inc finds the item to be in normal operating condition or not defective the item will be returned freight collect This Limited Warranty is in lieu of all other expres...

Page 18: ...1 Industrial Blvd 101 Sauk Rapids MN 56379 USA Toll Free 800 779 3267 Fax 320 251 2922 Web www masterindustrialproducts com Email info pinnacleclimate com 2017 Pinnacle Climate Technologies Inc...

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