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104133

NATURAL GAS CONSTRUCTION HEATER

MODEL TC250RNG

THEORY OF
OPERATION

The Fuel System:

  The gas supply at-

taches to the heater by a minimum 3/8 inch
i.d. hose or flexible connector. User must
supply hose or flexible connector. The length
should be no more than 10 feet long. The
natural gas moves through the regulator (if
used) and through the control valve, then
out the nozzle.

The Ignition System:

 The piezo ignitor

lights the burner fuel supply.

The Automatic Control System:

 The

automatic control valve shuts off the heater
if the flame goes out.

1.

Remove all packing items applied to
heater for shipment. Keep plastic cover
caps (attached to valve inlet) for storage.

2.

Remove all items from carton.

3.

Check all items for shipping damage.
If heater is damaged, promptly inform
dealer where you bought heater.

Note:

 A gas hose is not included. User

must supply hose or flexible connec-
tor.

UNPACKING

SAFETY
INFORMATION

 WARNING: FIRE, BURN, IN-

HALATION, AND EXPLOSION
HAZARD. KEEP SOLID COMBUS-
TIBLES, SUCH AS BUILDING MA-
TERIALS, PAPER OR CARD-
BOARD, A SAFE DISTANCE
AWAY FROM THE HEATER AS
RECOMMENDED BY THE IN-
STRUCTIONS. NEVER USE THE
HEATER IN SPACES WHICH DO
OR MAY CONTAIN VOLATILE OR
AIRBORNE COMBUSTIBLES, OR
PRODUCTS SUCH AS GASO-
LINE, SOLVENTS, PAINT THIN-
NER, DUST PARTICLES OR UN-
KNOWN CHEMICALS.

 WARNING: NOT FOR HOME

OR RECREATIONAL VEHICLE
USE.

WARNINGS

The heater is designed for use as a construc-
tion heater.  Certain standards govern the
use of fuel gases and heating products for
specific uses. Your local authority can ad-
vise you about these. The primary purpose
of construction heaters is to provide tempo-
rary heating of buildings under construc-
tion, 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
.

Carbon Monoxide Poisoning:

  Some

people are more affected by carbon monox-
ide than others. Early signs of carbon mon-
oxide poisoning resemble the flu, with head-
aches, dizziness, and/or nausea. If you have
these signs, the heater may not be working
properly. Get fresh air at once! Check for
proper ventilation and have heater serviced.

Natural Gas:

  Natural gas has a distinctive

odor. This odor helps you detect a natural
gas leak. However, the odor may fade. 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. In the
absence of local ordinances and codes,
refer to the National Fuel Gas Code
Handbook, NFPA54/ANSI Z223.1 
and
the Natural Gas Installation Code, CAN/
CGA B149.2.
 This instructs on the safe
storage and handling of flammable gases.

• Use only with natural gas. Do not attempt

to use with LP gas.

• Provide adequate ventilation. Before us-

ing heater, provide at least a three-square-
foot opening of fresh, outside air for each
100,000 Btu/Hr of rating. This heater
produces carbon monoxide, which is
listed by the State of California as a re-
productive toxin under Proposition 65.

• For indoor use only. Do not use heater

outdoors.

• Do not use heater in occupied dwellings

or in living or sleeping quarters.

• Do not use heater below ground level.

• Keep appliance area clear and free from

combustible materials, gasoline, paint
thinner, and other flammable vapors and
liquids. Do not use heater in areas with
high dust content.

• Minimum heater clearances from com-

bustible materials:

Sides: 6 Ft.

Top: 5 Ft.

• Check heater for damage before each use.

Do not use a damaged heater.

• Check hose (if used) before each use of

heater. If highly worn or cut, replace be-
fore using heater.

• Locate heater on stable and level surface

if heater is hot or operating.

• Not intended for use on finished floors.

• Never block air inlet (bottom of shell) or

air outlet (top of shell) of heater.

• Keep heater away from strong drafts,

water spray, rain, or dripping water.

• Keep children and animals away from

heater.

• Do not leave heater unattended.

• Never move, handle, or service a hot or

operating heater. Severe burns may res-
ult. You must wait 20 minutes after turn-
ing heater off.

• To prevent injury, wear gloves when han-

dling heater.

• Never attach duct work to heater.

• Do not alter heater. Keep heater in its

original state.

• Do not use heater if altered.

• Turn off natural gas supply to heater

when not in use.

• Use only original replacement parts. This

heater must use design-specific parts. Do
not substitute or use generic parts. Im-
proper replacement parts could cause
serious or fatal injuries.

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 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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