Desa Tech BLP50V, REM50PV, RLP50V Owner's Manual

PROPANE

CONSTRUCTION

HEATER

OWNER’S MANUAL

Models: RLP50V, BLP50V, and REM50PV

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.

®

50,000 BTU/HR
PROPANE CONSTRUCTION HEATER

SAFETY
INFORMATION

WARNINGS

WARNING ICON G 001

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 in accordance with ANSI Z83.7/
CGA 2.14. 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.

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 three-prong
(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-square­foot 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 may 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.

• T o 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.

2

103868

OWNER’S MANUAL

PRODUCT
IDENTIFICATION

Hot Air Outlet
(Front)

Heater Base

Piezo Ignitor
Button

Automatic Control
Valve Knob

Hose /Regulator
Assembly

Figure 1 - 50,000 BTU/Hr Model

Shell

Fan Guard

Valve
Inlet

Handle

Motor

Power
Cord

UNPACKING

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.

PROPANE
SUPPLY

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 li-

brary 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).

Average Number Of

Temperature (°F) Tanks
At Tank Location (100-pound)

40° 1
32° 1
20° 1
10° 1

0° 1

-10° 2

-20° 2

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3

50,000 BTU/HR
PROPANE CONSTRUCTION HEATER

THEORY OF
OPERATION

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.

INSTALLATION

WARNING: Review and un­derstand the warnings in the
Safety Information Section, page

2. 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).

2. Connect fuel gas fitting on hose/regu­lator assembly to propane tank(s). Turn
fuel gas fitting counterclockwise into
threads on tank. Tighten firmly using a
wrench.
lator so that hose leaving the regulator
is in a horizontal position (see Figure

3). This places the regulator vent in the
proper position to protect it from the
weather.

3. Connect hose to valve inlet. Tighten
firmly using a wrench. You must use
the regulator supplied with heater.

IMPORT ANT:

Position regu-

4. Open propane supply valve on propane
tank(s) slowly. Note: If not opened
slowly, excess-flow check valve on pro­pane tank may stop gas flow. If this
happens, close propane supply valve
and open again slowly.

5. Check all connections for leaks. Apply
mixture of liquid soap and water to gas
joints. Bubbles forming show a leak
that must be corrected.

6. Close propane supply valve.

WARNING: 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 that must be cor­rected. Correct all leaks at once.

Regulator
Propane
Supply
Valve

Propane
Tank

Figure 3 - Regulator Position

Hose

Fuel Gas
Fitting

Combustion Chamber

Clean
Heated Air
Out
(Front)

Air For Combustion Air For Heating

Figure 2 - Cross Section Operational View

Fan

4

Motor

Cool Air
In (Back)

Hose/
Regulator
Assembly

Knob

Valve Inlet

Figure 4 - Hose and Inlet Connector

Hose

103868