Desa BLP155AT User Manual

PROPANE

CONSTRUCTION

HEATER

OWNER’S MANUAL

Heater Size: 50,000 BTU/Hr

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.

®

CONTENTS

SECTION PAGE

Safety Information.........................................................................2

Product Identification .................................................................... 4

Unpacking......................................................................................4

Theory of Operation ......................................................................5

Propane Supply..............................................................................5

Installation .....................................................................................6

Ventilation .....................................................................................7

Operation .......................................................................................7

Storage ........................................................................................... 9

Maintenance .................................................................................. 9

Troubleshooting.............................................................................10

Service Procedures ........................................................................ 11

Specifications.................................................................................14

Wiring Diagram.............................................................................14

Accessories .................................................................................... 15

Technical Service ..........................................................................15

Replacement Parts .........................................................................15

Illustrated Parts List.......................................................................16

Warranty and Repair Service.........................................................Back Cover

SAFETY

INFORMATION

2

W ARNINGS

WARNING ICON G 001

WARNING: FIRE, BURN, INHALATION, AND EXPLOSION

WARNING ICON G 001

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

WARNING ICON G 001

NOT FOR HOME OR RECREATIONAL VEHICLE USE.

The heater is designed for use as a construction heater in accordance with ANSI
Z83.7•CGA2.14. Other 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.

Other standards govern the use of fuel gases and heat producing products for
specific uses. Your local authorities can advise you about these.

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.

Safety Information continues on next page

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SAFETY

INFORMATION

Continued

2

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!

WARNINGS

Propane Gas: Propane gas is odorless. An odor-making agent is added to propane

gas. The odor helps you detect a propane gas leak. However, the odor added to
propane gas may fade. Propane 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 Standard for Storage and

Handling of Liquefied Petroleum Gas, ANSI/NFPA 58 and the Natural Gas
Installation Code, CAN/CGA B149.2. This instructs on the safe storage and

handling of propane 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 Canadian Electrical Code, Part 1.

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

• Use only a three-prong, grounded extension cord.

• Use only the hose and factory preset regulator provided with the heater.

• Use only propane gas set up for vapor withdrawal.

• Provide adequate ventilation. Before using heater, provide at least a 1.5 square
foot opening of fresh, outside air. 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.

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

• Do not use heater below ground level. Propane gas is heavier than air. If a leak
occurs, propane gas will sink to the lowest possible 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 combustibles:
Outlet: 6 Ft. Sides: 2 Ft. Top: 6 Ft. Rear: 2 Ft.

• Keep heater at least six feet from propane tank(s). Do not point heater at
propane tank(s) within 20 feet.

• Keep propane tank(s) below 100° F.

• Check heater for damage before each use. Do not use a damaged heater.

• Check hose before each use of heater. If highly worn or cut, replace before
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 (rear) or air outlet (front) of heater.

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

• Do not leave heater unattended.

• Keep children and animals away from heater.

• Never move, handle, or service a hot, operating, or plugged-in heater. Severe
burns may result. Wait 20 minutes after turning heater off.

• To prevent injury, wear gloves when handling 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 propane supply 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.

Continued

3

PRODUCT

IDENTIFICATION

Hot Air Outlet
(Front)

Shell

Handle

Motor

Fan Guard

Heater Base

UNPACKING

Piezo Ignitor
Button

Automatic
Control Valve
Button

Hose /Regulator
Assembly

Figure 1 - 50,000 BTU/Hr Model

Inlet
Connector

Power
Cord

1. Remove all packing items applied to heater for shipment. Keep plastic cover
caps (attached to inlet connector and hose/regulator assembly) 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

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THEORY OF

OPERATION

Clean
Heated
Air Out
(Front)

The Fuel System: The hose/regulator assembly attaches to the propane gas
supply. This provides fuel to the heater.

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 piezo ignitor lights the burner.
The Automatic Control System: This system causes the heater to shut down

if the flame goes out.

Combustion
Chamber

Fan

Motor

Cool Air In
(Back)

PROPANE

SUPPLY

Hose/Regulator
Assembly

Air For Combustion Air For Heating

Figure 2 - Cross Section Operational View

Propane gas and propane tank(s) are to be furnished by the user.
Use this heater only with a propane vapor withdrawal supply system. See Chapter 5

of the Standard for Storage and Handling of Liquefied Petroleum Gas, ANSI/NFPA
58 and or CAN/CGA B149.2. Your local library or fire department will have this
booklet.

The amount of propane gas ready for use from propane tanks varies. Two factors
decide this amount:

1. The amount of propane gas in tank(s)

2. The temperature of tank(s)
This heater is designed to operate with a minimum 20-pound propane tank. You

may need two or more tanks or one larger tank in colder weather. Use a 100-pound
tank for longer operation or in very cold weather. Less gas is vaporized at lower
temperatures. Your local propane gas dealer will help you select the proper supply
system. The minimum surrounding air temperature rating for each heater is -20°F
(-29°C).

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Average Temperature (°F)
At Tank Location 40° 32° 20° 10° 0° -10° -20°

Number Of Tanks
(100-pound) 1111 1 2 2

5

INSTALLATION

Review and understand the warnings in the Safety Informa­tion Section, pages 2 and 3. They are needed to safely
operate this heater. Follow all local codes when using this
heater.

!

WARNING

Test all gas piping and connections for leaks after installa­tion 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 propane supply system (see Propane Supply, page 5).

2. Connect POL fitting on hose/regulator assembly to propane tank(s). Turn POL
fitting counterclockwise into threads on tank. Tighten firmly using
wrench.
in a horizontal position (see Figure 3). This places the regulator vent in the
proper position to protect it from the weather.

IMPORTANT:

Propane
Tank

Position regulator so that hose leaving the regulator is

Propane
Supply
Valve

WARNING

!

Regulator

Hose

POL Fitting

Figure 3 - Regulator Position

3. Connect hose to inlet connector. Tighten firmly using a wrench.

IMPORTANT:

between hose/regulator assembly and propane tank. You must use the regula­tor supplied with heater.

Use extra hose or piping if needed. Install extra hose or piping

Inlet Connector

Figure 4 - Hose and Inlet Connector

Hose

6

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