Desa BNG150T User Manual

NATURAL GAS CONSTRUCTION HEATER

OWNER’S MANUAL

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150 LP SIDE PV 017

Model BNG150T 150,000 Btu/Hr

With Built-in Thermostat

IMPORTANT: Read and understand this manual before assembling, starting, or servicing heater. Improper use of heater can cause serious injury. Keep this manual for future reference.

GENERAL HAZARD WARNING:

FAILURE TO COMPLY WITH THE PRECAUTIONS AND INSTRUCTIONS PROVIDED WITH THIS HEATER, CAN RESULT IN DEATH, SERIOUS BODILY INJURY AND PROPERTY LOSS OR DAMAGE FROM HAZARDS OF FIRE, EXPLOSION, BURN, ASPHYXIATION, CARBON MONOXIDE POISONING, 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 INSTRUCTIONS MANUAL, LABELS, ETC. CONTACT THE MANUFACTURER.

TABLE OF CONTENTS

SAFETY INFORMATION ............................................................ 2

PRODUCT IDENTIFICATION ..................................................... 3

UNPACKING............................................................................... 3

THEORY OF OPERATION ......................................................... 3

NATURAL GAS SUPPLY ............................................................ 3

VENTILATION............................................................................. 3

INSTALLATION........................................................................... 4

OPERATION ............................................................................... 4

STORAGE................................................................................... 5

MAINTENANCE .......................................................................... 5

SERVICE PROCEDURES .......................................................... 5

ILLUSTRATED PARTS BREAKDOWN AND PARTS LIST ......... 6

SPECIFICATIONS ...................................................................... 8

TECHNICAL SERVICE ............................................................... 8

REPLACEMENT PARTS ............................................................ 8

WIRING DIAGRAMS................................................................... 8

WARRANTY INFORMATION.....................................Back Cover

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\SAFETY INFORMATION

SAFETY INFORMATION

WARNINGS

WARNING: FIRE, BURN, INHALATION, AND EXPLOSION HAZARD. KEEP SOLID COMBUSTIBLES, SUCH AS BUILDING MATERIALS, PAPER OR CARDBOARD, A SAFE DISTANCE AWAY FROM THE HEATER AS RECOMMENDED BY THE INSTRUCTIONS. NEVER USE THE HEATER IN SPACES WHICH DO OR MAY CONTAIN VOLATILE OR AIRBORNE COMBUSTIBLES, OR PRODUCTS SUCH AS GASOLINE, SOLVENTS, PAINT THINNER, DUST PARTICLES OR UNKNOWN CHEMICALS.

WARNING: Not for home or recreational vehicle use.

The heater is designed for use as a construction heater. Certain standards govern the use of fuel gases and heating products for specific uses. Your local authority can advise you about these. The primary purpose of construction heaters is to provide temporary heating of buildings under construction, 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 monoxide than others. Early signs of carbon monoxide poisoning resemble the ﬂu, with headaches, 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. Natural 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 B149.1. This instructs on the safe storage and handling of flammable gases.

• Use only the electrical voltage and frequency specified on model plate. The electrical connections and grounding of the heater shall follow the National Electric Code, ANSI/NFPA 70 or the Canadian Electrical Code, Part 1.

• Electrical grounding instructions — This appliance is equipped with a three-prong (grounding) plug for your protection against shock hazard and should be plugged directly into a properly grounded three-prong receptacle or extension cord.

• Use only with natural gas. Do not attempt to use with propane/LP gas.

• Provide adequate ventilation. Before using 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 reproductive toxin under Proposition 65.

• For indoor use only. Do not use heater outdoors.

• Keep heater away from strong drafts, wind, water spray, rain, or dripping water.

• Do not use heater in occupied dwellings or in living or sleeping quarters.

• Do not use heater in a basement or below ground level.

• Keep appliance area clear and free from combustible materials, gasoline, paint thinner, and other flammable vapors and liquids. Dust is combustible. Do not use heater in areas with high dust content.

• Minimum heater clearances from combustible materials: Outlet: 8 Ft. Sides: 2 Ft. Top: 6 Ft. Rear: 2 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 with hose specified by manufacturer before using heater.

• Do not alter heater. Keep heater in its original state.

• Do not use heater if altered.

• Locate heater on stable and level surface if heater is hot or operating.

• Never block air inlet (rear) or air outlet (front) of heater.

• Do not leave heater unattended.

• Keep children and animals away from heater.

• This heater is equipped with a thermostat. Heater may start at anytime.

• Never move, handle, or service a hot or operating heater. Severe burns may result. You must wait 15 minutes after turning heater off.

• To prevent injury, wear gloves when handling heater.

• Never attach duct work to heater.

• Turn off natural gas supply to heater and unplug heater when not in use.

• Use only original replacement parts. This heater must use design-specific parts. Do not substitute or use generic parts. Improper replacement parts could cause serious or fatal injuries.

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PRODUCT IDENTIFICATION

UNPACKING

THEORY OF OPERATION

NATURAL GAS SUPPLY

VENTILATION

PRODUCT IDENTIFICATION

Hot Air Outlet (Front)

Lower Shell

Figure 1 - 150,000 Btu/Hr Model

On/Off Switch

Upper Shell

Handle

Fan Guard

Power Cord

Thermostat Knob

Inlet Connector

UNPACKING

1. Remove all packing items applied to heater for shipment. Keep plastic cover cap (attached to inlet connector) 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.

4. Hose not included. User must supply hose or flexible connector.

THEORY OF OPERATION

The Fuel System: The gas supply attaches to the heater by a

minimum 3/4 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 solenoid valve and the internal regulator and out the nozzle.

The Air System: The motor turns the fan. The fan pushes air into and

around the combustion chamber. This air is heated and provides a stream of clean, hot air.

The Ignition System: The direct spark ignitor (DSI) sends voltage

to the ignitor. The ignitor ignites the fuel and air mixture.

The Safety Control System: This system causes the heater to shut

down if the flame goes out.

Combustion Chamber

Clean Heated Air Out (Front)

Nozzle

DSI

Air For Combustion And Heating

Figure 2 - Cross Section Operational View

Ignitor

Internal Regulator

Fan

Motor

On/Off Switch

Solenoid Valve

Fuel

NATURAL GAS SUPPLY

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

Regulate the natural gas supply down from a minimum 5 inches water column to a maximum of 1/2 psi. The natural gas supply capacity should be able to supply a minimum of 150 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 Natural gas Installation Code, CAN/CGA B149.1.

VENTILATION

WARNING: Follow the minimum fresh, outside air ventilation requirements. If proper fresh, outside air ventilation is not provided, carbon monoxide poisoning can occur. Provide proper fresh, outside air ventilation before running heater.

Provide a fresh air opening of at least three square feet for each 100,000 Btu/Hr rating. Provide extra fresh air if more heaters are being used.

Cool Air In (Back)

Power Cord

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INSTALLATION OPERATION

To Start Heater To Stop Heater

INSTALLATION

WARNING: Review and understand the warnings in the needed to safely operate this heater. Follow all local codes when using this heater.

for leaks after installing or servicing. Never use an open flame to check for a leak. Apply a mixture of liquid soap and water to all joints. Bubbles forming show a leak. Correct all leaks at once.

1. Provide natural gas supply system.

2. Install plumbing to a low pressure natural gas source. The

3. Connect the hose to the heater at the 1/2 inch SAE flare fitting

4. Open natural gas supply valve slowly.

5. Check all connections for leaks.

6. Close natural gas supply valve.

Figure 3 - Hose and Inlet Connector

Safety Information

WARNING: Test all gas piping and connections

source must be regulated to a maximum 1/2 psi. The plumbing must be a minimum 3/4 inch i.d. hose or flexible connector not over 10 feet long.

at the inlet.

Inlet Connector

section, page 2. They are

Hose (not included)

OPERATION

WARNING: Review and understand the warnings in the needed to safely operate this heater. Follow all local codes when using this heater.

TO START HEATER

1. Follow all installation, ventilation and safety information.

2. Locate heater on stable and level surface. Make sure strong

3. Plug power cord of heater into a three-prong, grounded exten-

4. Plug extension cord into a 120 volt/60 hertz, three-hole,

5. Open natural gas supply valve slowly.

6. Turn thermostat control knob fully counterclockwise to the

7. Thermostat Operation Only: During normal thermostat op-

Safety Information

drafts do not blow into front or rear of heater.

sion cord. Extension cord must be at least six feet long. Extension cord must be UL listed.

Extension Cord Size Requirement

Up to 50 feet long, use 18 AWG rated cord. 51 to 100 feet long, use 16 AWG rated cord. 101 to 200 feet long, use 14 AWG rated cord.

grounded outlet.

"COOLER" position. Turn ON/OFF switch to the ON position. Turn thermostat control knob slowly clockwise until electric motor and fan begin to run. Heater will start in approximately 3 seconds. Adjust thermostat control knob to WARMER or COOLER setting as needed.

Note:

If heater does not start after 3 seconds, the ignition control will automatically attempt to start heater one time. If heater fails to start on this attempt, the safety control will "lock out" and no further automatic restarts will be attempted. This could occur if air remains in fuel line. If heater fails to start on this attempt, turn ON/OFF switch to OFF position. Wait ten seconds for safety control to reset, then turn ON/OFF switch back to ON position and try to start heater again.

eration, heater will cycle off when air temperature rises to thermostat setting. When air temperature drops sufficiently below thermostat setting, the electric motor and fan will begin to run. After 15 to 60 seconds, heater burner should automatically ignite and provide heat to maintain temperature setting.

section, page 2. They are

TO STOP HEATER

1. Tightly close natural gas supply valve.

2. Wait a few seconds. Heater will burn gas left in supply hoses.

3. Turn on/off switch to the OFF position.

4. Unplug heater.

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