Desa Tech BLP42, REM30LP Owner's Manual
PROPANE CONSTRUCTION FORCED AIR HEATER
OWNER'S MANUAL
30/35/40,000
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.
Safety Information ............................................... 2
Unpacking ........................................................... 3
Product Identifica
Theory of Operation ............................................ 3
Assembly ............................................................. 4
Propane Supply ................................................... 4
Installation ........................................................... 5
Ventilation
Operation ............................................................ 6
Storage ................................................................ 6
tion ........................................... 3
........................................................... 5
TABLE OF CONTENTS
Maintenance ........................................................ 7
Service Procedures ............................................. 7
Specifications
Troubleshooting ................................................. 10
Accessories ........................................................11
Technical Service ...............................................
Replacement Parts .............................................11
Illustrated Parts Breakdown and Parts List ....... 12
Warranty and Repair Service ..............Back Cover
Save this manual for future reference.
For more information, visit www.desatech.com
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SAFETY INFORMATION
WARNING: This product
contains and/or generates
chemicals known to the State
of California to cause cancer or
birth defects or other reproductive harm.
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•CGA2.14-
2000. 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 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 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 can fade. Propane gas
may be present even though no odor exists.
Make certain you read and understand all warn
ings. Keep this manual for reference. It is your
guide to safe and proper operation of this heater.
1. 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 Lique
fied Petroleum Gas, ANSI/NFPA 58 and the
Propane Gas Installation Code, CAN/CGA
B149.2. This instructs on the safe storage and
handling of propane gases.
2. Use only the electrical voltage and frequency
specified on model plate. The electrical con
nections and grounding of the heater shall fol
low the National Electric Code, ANSI/NFPA
70 or the Canadian Electrical Code, Part 1.
3. Electrical grounding instructions: This appli
ance is equipped with a three-prong (ground
ing) plug for your protection against shock
hazard and should be plugged directly into a
properly grounded three-prong receptacle or
extension cord.
4. This product has been approved for use in the
Commonwealth of Massachusetts.
5. Use only a three-prong, grounded extension
cord.
6. Use only the hose and factory preset regulator
provided with the heater.
7. Use only propane gas set up for vapor with
drawal.
8. Provide adequate ventilation. Before using
heater, provide at least a 1.5 square-foot
(1400 cm
9. For indoor use only. Do not use heater out
doors.
10. Do not use heater in occupied dwellings or in
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living or sleeping quarters.
11. Do not use heater in basement or below ground
level. Propane gas is heavier than air. If a leak
occurs, propane gas will sink to the lowest
possible level.
12. Keep appliance area clear and free from com
bustible materials, gasoline, paint thinner and
other flammable vapors and liquids.
13. Do not use heater in areas with high dust
content. Dust is combustible.
2
) opening of fresh, outside air.
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SAFETY INFORMATION
Air For Combustion
Air For Heating
Continued
14.
Minimum heater clearances from combustibles: Outlet: 6 Ft. (1.83 m) Sides: 2 Ft. (0.61 m)
Top: 6 Ft. (1.83 m) Rear: 2 Ft. (0.61 m)
15. Keep heater at least six feet from propane
tank(s). Do not point heater at propane tank(s)
within 20 feet.
16. Keep propane tank(s) below 100° F (37.8° C).
17. Check heater for damage before each use. Do
not use a damaged heater.
18. Check hose before each use of heater. If highly
worn or cut, replace with hose specified by
manufacturer before using heater.
19. Locate heater on stable and level surface if
heater is hot or operating.
20. Not intended for use on finished floors.
21. Never block air inlet (rear) or air outlet (front)
of heater.
22. Keep heater away from strong drafts, water
spray, rain or dripping water.
23. Do not leave heater unattended.
24. Keep children and animals away from
heater.
25. Never move, handle or service a hot, operat
ing or plugged-in heater. Severe burns may
result. You must wait 15 minutes after turning
heater off.
26. To prevent injury, wear gloves when handling
heater.
27. Never attach duct work to front or rear of
heater.
28. Do not alter heater. Keep heater in its original
state.
29. Do not use heater if altered.
30. Turn off propane supply and unplug heater
when not in use.
31. Use only original replacement parts. This heater
must use design-specific parts. Do not substi
tute or use generic parts. Improper replacement
parts could cause serious or fatal injuries.
PRODUCT
IDENTIFICATION
Hot Air Outlet
(Front)
Outer Shell
Handle
Piezo
Ignitor
Button
Automatic
Control Valve
Button
Hose/
Regulator
Assembly
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Figure 1 - 30,000 Btu/Hr Model Shown
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.
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Clean Heated
Air Out (Front)
Fan
Motor
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.
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Cool
Air In
(Back)
Combustion
Chamber
Air For
Combustion
Air For
Heating
Hose/Regulator Assembly
Figure 2 - Cross Section Operational View
3
ASSEMBLY
1. Remove screw from top of fan guard (see
Figure 3). 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
screws (provided with handle) through
handle and tighten into shell (see Figure 3).
Make sure rear screw goes through shell and
into fan guard. Tighten screws firmly.
Remove
Screw
Figure 3 - Removing Screw from Top of
Fan Guard
Flat Side
Facing Up
Nut Clip
Shell
Slot
Figure 4 - Installing Nut Clip
Screws
Nut Clip
Figure 5 - Attaching Handle
Handle
Rear of
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
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 (9 kg) propane tank. You may need two
or more tanks or one larger tank in colder weather.
Use a 100 pound (45 kg) 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 Temp Number Of Tanks
At Tank Location 100 pound (45 kg)
above 0° F (-18° C) 1
below 0° F (-18° C) 2
Smaller tanks can be used for limited run times
but it is recommended to use larger tanks for
optimum performance.
and/or CAN/CGA
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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, page 4).
2. Connect POL fitting on hose/regulator as
sembly to propane tank(s). Turn POL fitting
counterclockwise into threads on tank. Tighten
firmly using wrench. IMPORTANT: Position
regulator so that hose leaving the regulator is
in a horizontal position (see Figure 6). This
places the regulator vent in the proper position
to protect it from the weather.
3. Connect hose to valve inlet (see Figure 7).
Tighten firmly using a wrench.
IMPORTANT: Use extra hose or piping if
needed. Install extra hose or piping between
hose/regulator assembly and propane tank. You
must use the regulator supplied with heater.
4. Open propane supply valve on propane
tank(s) slowly.
excess-flow check valve on propane tank will
stop gas flow. You may hear a click from the
excess-flow check valve closing. If this hap
pens, reset the excess-flow check valve by
closing propane supply valve and open again
slowly.
5. Check all connections for leaks. Apply mix
ture of liquid soap and water to gas joints.
Bubbles forming show a leak that must be
corrected.
6. Close propane supply valve.
Note: If not opened slowly,
Propane Supply
Valve
Propane
Tank
Figure 6 - Regulator Position
Inlet Connector
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Figure 7 - Hose and Inlet Connector
POL
Fitting
VENTILATION
WARNING: Provide at least
a 1.5 square foot (1400 cm
opening of fresh, outside air
while running heater. If proper
fresh, outside air ventilation is
not provided, carbon monoxide
poisoning can occur. Provide
proper fresh, outside air ventilation before running heater.
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Hose
Regulator
Hose
2
)
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OPERATION
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.
TO START HEATER
1. Follow all installation, ventilation and safety
information.
2. Locate heater on stable and level surface.
Make sure strong drafts do not blow into front
or rear of heater.
3. Plug power cord of heater into a three-prong,
grounded extension cord. Extension cord must
be at least six feet long. Extension cord must
be UL listed.
Extension Cord Wire Size Requirements
Up to 50 ft (15.24 m) long, use 18 AWG rated
cord.
51 to 100 ft (15.54 to 30.48 m) long, use 16
AWG rated cord.
101 to 200 ft (30.78 to 60.96 m) long, use 14
AWG rated cord.
4. Plug extension cord into a 120 volt/60 hertz,
3-hole, grounded outlet. Motor will start. Fan
will turn, forcing air out front of heater.
5. Open propane supply valve on propane
tank(s) slowly.
excess-flow check valve on propane tank will
stop gas flow. You may hear a click from the
excess-flow check valve closing. If this happens, reset the excess-flow check valve by
closing propane supply valve and open again
slowly.
WARNING: Be sure motor
and fan are running before
pushing in automatic control
valve button. Flames could flash
outside heater if motor and fan
are not running.
6. Push in and hold automatic control valve button (see Figure 8). Push piezo ignitor button
(see Figure 8). Keep pushing ignitor button
until the burner lights. When burner lights,
keep automatic control valve button pushed in.
Release button after 30 seconds. This activates
the automatic control system.
Note: If not opened slowly,
Note: If heater fails to ignite, hose may have
air in it. If so, keep automatic control valve
button pressed and wait 20 seconds. Release
automatic control valve button and wait 20
seconds for unburned fuel to exit heater.
Repeat this step.
NOTICE: If heater is unplugged or
power outage occurs while heater
is running, the thermal limit device
will stop fuel flow. A few seconds
occur before the thermal limit device activates. During this short
time, flames may appear outside
the heater. This is normal. The
flames will go out when thermal
limit device activates.
Piezo
Ignitor
Button
Automatic Control
Valve Button
Figure 8 - Automatic Control Valve
Button and Piezo Ignitor Button
TO STOP HEATER
1. Tightly close propane supply valve on propane
tank(s).
2. Wait a few seconds. Heater will burn gas left
in supply hose.
3. Unplug heater.
TO RESTART HEATER
1. Wait five minutes after stopping heater.
2. Repeat steps under To Start Heater
.
STORAGE
CAUTION: Disconnect heater
from propane supply tank(s).
1. Store propane tank(s) in safe manner. See
Chapter 5 of Standard for Storage and Han
dling of Liquefied Petroleum Gases, ANSI/
NFPA 58. Follow all local codes. Always store
propane tanks outdoors.
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111656-01E
STORAGE
Continued
2. Place plastic cover caps over brass fittings on
inlet connector and hose/regulator assembly.
3. Store in dry, clean and safe place. Do not
store hose/regulator assembly inside heater
combustion chamber.
4. When taking heater out of storage, always
check inside of heater. Insects and small
animals may place foreign objects in heater.
Remove motor and other internal parts if
needed to remove foreign objects (see Service
Procedures
).
MAINTENANCE
WARNINGS
• Never service heater while it
is plugged in, connected to
propane supply, operating or
hot. Severe burns and electri
cal shock can occur.
• Keep heater clear and free
from combustible materials,
gasoline and other flammable
vapors and liquids.
• Do not block the flow of combustion or ventilation air.
1. Keep heater clean. Clean heater annually or as
needed to remove dust and debris. If heater is
dirty or dusty, clean heater with a damp cloth.
Use household cleaners on difficult spots.
2. Inspect heater before each use. Check connec
tions for leaks. Apply mixture of liquid soap
and water to connections. Bubbles forming
show a leak. Correct all leaks at once.
3. Inspect hose/regulator assembly before each
use. If hose is highly worn or cut, replace with
hose specified by manufacturer.
4. Have heater inspected yearly by a qualified
service agency.
5. Keep inside of heater free from combustible
and foreign objects. Remove motor and other
internal parts if needed to clean inside of
heater (see Service Procedures).
6. Clean fan blades each season or as needed (see
Fan, page 8).
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SERVICE PROCEDURES
WARNING: Never service
heater while it is plugged in,
connected to propane supply,
operating or hot. Severe burns
and electrical shock can occur.
ELECTRICAL SYSTEM
The entire electrical system for this heater is contained within the motor. If any part of the electrical
system is damaged, you must replace motor.
MOTOR
1. Remove three screws that attach fan guard to
heater shell.
2. Remove motor and fan guard from heater shell
(see Figure 9).
3. Use hex wrench to loosen set screw which
holds fan to motor shaft (see Figure 10). Re
move fan. Be careful not to damage the fan
blade pitch.
4. Remove two nuts and two screws that attach
fan guard to motor using nut-driver. Remove
fan guard from motor (see Figure 11, page 8).
Screw
Screw
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Screw
Figure 9 - Removing Motor and Fan
Guard from Heater
Motor and
Fan Guard
Setscrew
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Figure 10 - Setscrew Location
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SERVICE PROCEDURES
Continued
5 Disconnect the green power cord wire from
motor and remove black and white wire ter
minals.
6. Discard 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 motor.
Make sure set screw contacts flat surface on
motor shaft. Tighten set screw firmly (40-50
inch-pounds [46.08-57.60 kg-cm]).
11. Place motor and fan guard into rear of heater
shell. Make sure power cord is properly lo
cated (see Figure 12).
12. Insert three screws through heater shell and
into fan guard (see Figure 12). Tighten screws
firmly.
Fan Guard
Nut
Motor
Figure 11 - Removing or Attaching Fan
Guard from Motor
Screw
FAN
1. Remove three screws that attach fan guard to
heater shell.
2. Remove motor and fan guard from heater shell
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(see Figure 9, page 7).
3. Use hex wrench to loosen set screw that holds
fan to motor shaft (see Figure 10, page 7).
4. Remove fan. Be careful 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 motor shaft.
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Tighten set screw firmly (40-50 inch-pounds
[46.08-57.60 kilogram-centimeters]).
8. Place motor and fan guard into rear of heater
shell. Make sure power cord is properly lo
cated (see Figure 12).
9. Insert three screws through heater shell and
into fan guard. Tighten screws firmly.
IGNITOR
1. Remove motor and fan guard from heater (see
Motor, page 7, steps 1 and 2).
2. Remove black ignitor wire from piezo ignitor.
Access ignitor wire through underside of
heater base (see Figure 13). Push wire up
through notch in filler panel.
3. Remove ignitor mounting screw from rear
head using nut-driver or standard screwdriver
(see Figure 14).
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Screw
Screw
Screw
Figure 12 - Replacing Motor and Fan
Guard Into Heater
8
Motor and
Fan Guard
Piezo
Ignitor
Ignitor Wire
Figure 13 - Removing Ignitor Wire from
Ignitor
Figure 14 - Removing Ignitor Mounting
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Underside
of Heater
Piezo Ignitor
Mounting
Screw
Screw and Ignitor
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SERVICE PROCEDURES
Continued
4. Remove ignitor from rear head.
5. Install new ignitor. Attach ignitor to rear head
with ignitor mounting screw.
6. Run ignitor wire from new ignitor through
notch in filler panel. Attach ignitor wire to
piezo ignitor.
7. Set gap between ignitor electrode and target
plate to .17" (0.43 cm) (see Figure 15).
8. Test for spark. Push piezo ignitor button and
watch for spark between ignitor electrode and
target plate.
9. Place motor and fan guard into rear of heater
shell (see Motor, page 7, steps 9 and 10).
Ignitor Electrode
Gap
Area
WARNING: Make sure heater
is disconnected from propane
supply. Heater could ignite causing severe burns.
Figure 15 - Clearance Between Ignitor
Electrode and Target Plate
SPECIFICATIONS
BLP30, NLP30, REM30LP, RLP30
• Output Rating: 30,000 Btu/Hr
• Fuel: Propane Vapor Only
• Ignition: Manual, Piezo
• Fuel Consumption/Hour: 0.33 gal (1.25 liters)
1.4 lb (0.63 kg)
• Supply Pressure To Regulator:
Min* - 20 psi, Max - Tank Pressure or 200 psi
• Regulator Outlet Pressure: 10 PSI
• Manifold Pressure: 10.1 PSI
RLLP35
• Output Rating: 35,000 Btu/Hr
• Fuel: Propane Vapor Only
• Ignition: Manual, Piezo
• Fuel Consumption/Hour: 0.38 gal (1.44 liters)
1.62 lb (0.74 kg)
• Supply Pressure To Regulator:
Min* - 20 psi, Max - Tank Pressure or 200 psi
• Regulator Outlet Pressure: 10 PSI
• Manifold Pressure: 9.7 PSI
* For purposes of input adjustment
** When running heater in temperatures above 85° F (29.44° C), high internal temperatures may cause
thermal limit device to shut down heater.
RM40LP, RM40SP, SPC-40B
• Output Rating: 40,000 Btu/Hr
• Fuel: Propane Vapor Only
• Ignition: Manual, Piezo
• Fuel Consumption/Hour: 0.44 gal (1.65 liters)
1.86 lb (0.84 kg)
• Supply Pressure To Regulator:
Min* - 20 psi, Max - Tank Pressure or 200 psi
• Regulator Outlet Pressure: 10 PSI
• Manifold Pressure: 9.7 PSI
REMAINDER OF LIST APPLIES TO
ALL MODELS
• Hot Air Output (CFM Approx): 175
• Motor: 3045 RPM, 1/40 HP
• Electric Input: 120 volt/60 hertz
• Amperage: 0.6
• Temperature Range for Heater Operation:
-20° F to 85° F** (-29° C to 29.4° C)**
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