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105338

PROPANE CONSTRUCTION HEATER

50,000 BTU/HR

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.

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 re-
pair. 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 AU-
THORITY 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 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.

WARNING ICON

G 001

 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 In-
stallation Code, CAN/CGA B149.2.
 This
instructs on the safe storage and handling
of propane gases.

• Use only the electrical voltage and fre-

quency specified on model plate.

• The electrical connections and ground-

ing of the heater shall follow the National
Electric Code, ANSI/NFPA 70
, or Cana-
dian 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 exten-

sion 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 us-

ing heater, provide at least a 1.5-square-
foot opening of fresh, outside air.

• Approved by the New York City Fire

Department under Certificate of Ap-
proval #4953. To be used only at con-
struction site with applicable New York
City codes, regulations, rules, directives,
permits, etc.

• This product has been approved for use

in the Commonwealth of Massachusetts.

• 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 low-
est 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 com-

bustibles:

Outlet: 6 Ft.

Sides: 2 Ft.

Top: 6 Ft.

Rear: 2 Ft.

• Keep heater at least six feet from pro-

pane tank(s). Do not point heater at pro-
pane 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 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 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. Im-
proper replacement parts could cause
serious or fatal injuries.

Summary of Contents for RM50PVA

Page 1: ...SPHYXIATION CARBON MONOXIDE POI SONING 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 Model RM50PVA IMPORTANT Read and understand this manual before assembling starting or servicing heater Improper use of heater can c...

Page 2: ...Electric Code ANSI NFPA 70 or Cana dian 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 exten sion cord Use only the hose and factory preset regulator provided with the heater Us...

Page 3: ... fire department will have this booklet The amount of propane gas ready for use from propane tanks varies Two factors de cide 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 minimum20 poundpropanetank Youmay need two or more tanks or one larger tank in colder weather Use a 100 pound tank for longer operation or in very cold we...

Page 4: ...ber Motor Clean Heated Air Out Front Hose Regulator Assembly Cool Air In Back Figure 2 Cross Section Operational View Fan ASSEMBLY 1 Remove screw from top of fan guard Discard screw 2 Insert nut clip provided with handle with flat side facing up through slot in top of shell Align holes in nut clip with screw hole behind slot in top of shell see Figure 4 3 Place handle over hole and clip Insert two...

Page 5: ...plied with heater 4 Open propane supply valve on propane tank s slowly Note If not opened slowly excess flow check valve on pro pane 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 Test...

Page 6: ...If main burner fails to light hose mayhaveairinit Ifso keepcontrolknob pressedandwait20seconds Releasecon trolknobandwait20secondsforunburned fuel to exit heater Repeat step 6 7 If main burner goes out repeat step 6 8 When main burner remains lit rotate control knob to the desired heat level WARNING Besuremotorand fan are running before pushing in automatic control valve but ton Flames could flash...

Page 7: ...rmal limit device to shut down heater 2 Restricted air flow 3 Damaged fan 4 Excessive dust or debris in surrounding area OBSERVED FAULT Fan does not turn when heater is plugged in Heater will not ignite Heater shuts down while running WARNING Never service heater while it is plugged in connected to propane supply operating or hot Severe burns and electrical shock can occur TROUBLESHOOTING MAINTENA...

Page 8: ...rd old motor 7 Attach green power cord wire to motor 8 Attach fan guard to new motor with two nuts and two screws 9 Replace black and white terminals 10 Place fan onto motor shaft of new mo tor Make sure set screw contacts flat surface on motor shaft Tighten set screw firmly 40 50 inch pounds 11 Place motor and fan guard into rear of heater shell Make sure power cord is properly located see Figure...

Page 9: ...l not to damage the fan blade pitch 5a If replacing fan remove old fan and discard Go to step 7 below 5b If cleaning fan use soft cloth moistened with kerosene or solvent 6 Dry fan thoroughly 7 Place fan onto motor shaft Make sure set screw contacts flat surface on mo tor shaft Tighten set screw firmly 40 50 inch pounds 8 Place motor and fan guard into rear of heater shell Make sure power cord is ...

Page 10: ...10 105338 PROPANE CONSTRUCTION HEATER 50 000 BTU HR ILLUSTRATED PARTS BREAKDOWN RM50PVA 28 27 15 17 18 21 1 2 3 2 4 6 7 9 11 21 22 23 24 25 19 2 10 26 16 12 13 14 5 20 20 8 ...

Page 11: ...84 38 Hex Tap Screw 8 18 x 3 8 1 12 101478 03 Fan 1 13 105332 01 Motor 1 14 103863 01 Fan Guard 1 15 097384 02 Captive Washer Nut 3 16 097968 05 Hex Screw 4 40 x 1 2 2 17 NPC 00C Hex Nut 4 40 2 18 101481 04 Thermal Switch 1 19 097776 01 Universal Bushing 1 20 099237 01 Thermocouple Nut 2 21 104146 01 Thermocouple 1 22 103921 01 Valve Orifice Assembly 1 23 102445 01 Piezo Ignitor 1 24 078978 03 Sle...

Page 12: ...w heater was malfunctioning purchase date In most cases we will ask you to return the defective part to the factory PARTS NOT 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 Parts Department at 1 800 972 7879 for referral information When calling DESA International have...

Page 13: ...____________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ _______________________________________________________________________________________________ ___________________________________________________________________________________________...

Page 14: ...enance is the responsibility of the owner THISEXPRESSWARRANTYISGIVENINLIEUOFANYOTHERWARRANTYEITHEREXPRESSEDORIMPLIED INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE DESA International assumes no responsibility for indirect incidental or consequential damages Some states do not allow the exclusion or limitationofincidentalorconsequentialdamages orlimitationsorexclusions...

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