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104133

OWNER’S MANUAL

PRODUCT
IDENTIFICATION

Figure 1 - Product Identification

Top

Emitter

Piezo Ignitor Button

Regulator/Fuel
Tube Assembly
Installed

Base

Base Shell

Main Burner
Valve Handle

Valve Inlet

Automatic Control
Valve Button

Main Burner
Tube

Nozzle

Ignitor Electrode

Thermocouple

NATURAL GAS
SUPPLY

SPECIFICATIONS

Rating(BTU/Hr)

250,000

Fuel

Natural Gas Only

Fuel Consumption

243 cubic ft/hr

Supply Pressure

Maximum (To regulator)

200 psi

Minimum (To heater)

4 psi

Maximum To Heater
Without Regulator

4 psi

Manifold Pressure

3.5 psi

Weight (Pounds)

33

Shipping Weight (Pounds)

40

Size -

46L x 16W x 16H (Inches)

VENTILATION

Fresh Outside Air Opening

Requirements

Heater Size - 250,000 BTU/Hr
Square 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
ventilation before running heater.

The user must furnish the natural gas supply
and the connections to the heater.

Regulate the natural gas supply down to
4 psi. If over 4 psi is supplied, then use the
supplied regulator on the heater. The natural
gas supply capacity should be able to supply
a minimum of 250 cubic feet of gas at
pressure for each heater connected to the
system.

Consult your natural gas supplier for proper
sizing of the natural gas supply lines.

Follow all local ordinances and codes.  In
the absence of local ordinances and codes,
refer to the National Fuel Gas Code Hand-
book, NFPA54/ANSI Z223.1 
and the Natu-
ral gas Installation Code, CAN/CGA B149.2.

Shell

Pilot Burner

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...

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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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