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104133

OWNER’S MANUAL

OPERATION

 WARNING: Review and un-

derstand the warnings in the
Safety Information Section, page
2. They are needed to safely op-
erate this heater. Follow all local
codes when using this heater.

Figure 3 - Main Burner Valve Handle, Automatic Control Valve Button, and Piezo
Ignitor Button Locations, With Regulator Installed

Piezo Ignitor
Button

Main Burner
Valve Handle

To Start Heater

1.

Follow all installation, ventilation, and
safety information.

2.

Locate heater on stable and level sur-
face. Make sure strong drafts do not
blow on heater.

 WARNING: Fully close main

burner valve before lighting pi-
lot. If not, severe burns can oc-
cur. Do this by turning valve
handle  towards the OFF position
until it stops.

3.

Open natural gas supply valve slowly.

4.

Push in and hold automatic control
valve button (see Figure 3). Push piezo
ignitor button (see Figure 3). You may
need to push the piezo ignitor button
3-8 times until the pilot lights. 

Note:

Hose may be filled with air. If so, keep
automatic control valve button pressed
and wait 20 seconds for gas to clear
before pressing ignitor button again.
When pilot lights, keep automatic con-
trol valve button pushed in. Release
button after 30 seconds.

5.

If pilot light goes out, repeat step 4.

6.

When pilot remains lit, fully open main
burner valve. Do this by turning main
burner valve handle towards the ON
position until it stops. 

Note:

 Arrows on

main burner valve handle show direc-
tions for ON and OFF.

Automatic
Control
Valve Button

To Stop Heater

1.

Tightly close natural gas supply valve.

2.

Using a gloved hand, shut off main
burner valve. Do this by turning main
burner valve handle towards the OFF
position until it stops. 

Note:

 Arrows on

main burner valve handle show direc-
tion for ON and OFF.

To Restart Heater

1.

Wait five minutes after stopping heater.

2.

Restart heater by following steps un-
der To Start Heater.

ON

OFF

Summary of Contents for TC250RNG

Page 1: ...ARNING FAILURE TO COMPLY WITH THE PRECAUTIONS AND INSTRUCTIONS PROVIDED WITH THIS HEATER CANRESULTINDEATH SERIOUSBODILYINJURYANDPROPERTYLOSSORDAMAGE FROM HAZARDS OF FIRE EXPLOSION BURN ASPHYXIATION CARBON MONOXIDE POISON ING AND OR ELECTRICAL SHOCK ONLY PERSONS WHO CAN UNDERSTAND AND FOLLOW THE INSTRUCTIONS SHOULD USE OR SERVICE THIS HEATER IF YOU NEED ASSISTANCE OR HEATER INFORMATION SUCH AS AN I...

Page 2: ...e heater serviced Natural Gas Natural gas has a distinctive odor This odor helps you detect a natural gasleak However theodormayfade Natu ral gas may be present even though no odor exists 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 Install and use heater with care Follow all local ordinances and codes...

Page 3: ...re Feet Opening 7 5 WARNING Provide at least a 7 5 square foot opening of fresh outside air while running heater If proper fresh outside air venti lation is not provided carbon monoxide poisoning can occur Provide proper fresh outside air ventilationbeforerunningheater Theusermustfurnishthenaturalgassupply and the connections to the heater Regulate the natural gas supply down to 4 psi If over 4 ps...

Page 4: ...des when using this heater gas at 4 psi pressure for each heater connected to the system 2 Mount regulator to heater base below piezo ignitor button see Figure 2 Use 1 4 20 screws from hardware bag to at tach regulator to heater Mount regula tor so the outlet with male connector points toward the heater inlet 3 Attach the 1 2 copper fuel tube sup plied to male connector on regulator Attach other e...

Page 5: ... ignitor button see Figure 3 You may need to push the piezo ignitor button 3 8 times until the pilot lights Note Hose may be filled with air If so keep automatic control valve button pressed and wait 20 seconds for gas to clear before pressing ignitor button again When pilot lights keep automatic con trol valve button pushed in Release button after 30 seconds 5 If pilot light goes out repeat step ...

Page 6: ...ton de pressed 3 Replace pilot orifice 4 Adjust ignitor electrode gap to 120 Check wire lead for damage Replace piezo ignitor and or ignitor electrode as necessary 1 Relight hold automatic control valve button in 45 seconds 2 Check for proper gas supply 3 Tighten connection or replace thermo couple 4 Replace automatic control valve 1 Fully open main burner valve by turn ing the valve handle toward...

Page 7: ...er from natural gas supply Parts Under Warranty Contact authorized dealers of this product If they can t supply original replacement part s either contact your nearest Parts Central or call DESA International s Tech nical Service Department at 1 800 323 5190 When calling DESA International have ready your name how heater was malfunctioning your address purchase date model number of your heater In ...

Page 8: ...8 104133 NATURAL GAS CONSTRUCTION HEATER MODEL TC250RNG ILLUSTRATED PARTS ON OFF 4 29 5 1 3 2 6 9 10 11 12 13 14 15 16 17 18 19 21 22 23 24 26 28 27 20 25 30 7 31 8 ...

Page 9: ...lectrode 1 13 097163 07 Pilot Burner Assembly 1 14 099237 01 Thermocouple Clip 1 15 097161 01 Pilot Burner Orifice 1 16 M5788 Sleeve 1 17 M5787 Hex Nut 1 18 103028 02 Pilot Tube 1 19 097152 01 Manual Control Valve 1 20 103901 01 Burner Support 1 21 099461 01 Tee Compression Gauge 1 22 099460 01 Brass Hex Cap 1 23 097155 01 Automatic Control Valve 1 24 097157 03 Female Connector 1 25 104142 01 Fuel...

Page 10: ...____________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ ___________________________________________________________________________...

Page 11: ...____________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ ___________________________________________________________________________________________...

Page 12: ...RRANTIES OR MERCHANTABILITY AND FITNESS FOR A PARTICULAR PUR POSE DESA International assumes no responsibility for indirect incidental or consequential damages Some states do not allow the exclusion or limitation of incidental or consequential damages or limitations or exclusions may not apply to you This Limited Warranty gives you specific legal rights and you may also have other rights which var...

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