Desa RCP25 User manual

CANADIAN
PROPANE
CONSTRUCTION
HEATER
OWNER’S MANUAL
Heater Size: 50,000 BTU/Hr
IMPORTANT
Readandunderstandthismanualbeforeassembling,starting,orservicingheater.
Improper use of heater can cause serious injury. Keep this manual for future
reference.

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101489
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
Service Publications ......................................................................15
Replacement Parts .........................................................................15
Warranty and Repair Service.........................................................Back Cover
SECTION PAGE
CONTENTS
Safety Information continues on next page
Carbon Monoxide Poisoning: Some people are more affected by carbon
monoxidethan others. Earlysignsof carbon monoxide poisoningresemble 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! Have heater serviced.
WARNING ICON G 001
WARNINGS
IMPORTANT: Read this owner’s manual carefully and completely before
trying to assemble, operate, or service this heater. Improper use of this
heater can cause serious injury or death from burns, fire, explosion, electri-
cal shock, or carbon monoxide poisoning.
SAFETY
INFORMATION
FOR YOUR SAFETY
Do not use this heater in a space where gasoline or other liquids
having flammable vapors are stored or used.

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2
SAFETY
INFORMATION
Continued
PropaneGas:Propanegasisodorless.Anodor-makingagentisaddedtopropane
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.
Makecertainyoureadandunderstandallwarnings.Keepthismanualforreference.
It is your guide to safe and proper operation of this heater.
• For indoor use only. Provide adequate ventilation.
• Do not use heater outdoors or in occupied dwellings.
• Do not use heater in living or sleeping quarters.
• Use only in well-vented areas. Before using heater, provide at least a 0.14 m2
(1.5-square-foot) opening of fresh, outside air.
• 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.
• Keep heater away from strong drafts, water spray, rain, or dripping water.
• Install and use heater with care. Follow all local ordinances and codes. In the
absence of local ordinances and codes, refer to CAN/CGA-B149.2 Installation
Code for Propane. This instructs on the safe storage and handling of propane
gases.
• Check heater for damage before each use. Do not use a damaged heater.
• Use only propane gas set up for vapor withdrawal.
• Keep propane tank(s) below 38°C (100° F).
• 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.
• Use only the electrical voltage and frequency specified on model plate.
• Use only a three-prong, grounded extension cord.
• Use only the hose and factory preset regulator provided with the heater.
• Inspect hose before each use of heater. If highly worn or cut, replace before
using heater. Use the replacement hose assembly specified in this manual.
• Keep heater at least 2 meters (six feet) from propane tank(s). Do not point
heater at propane tank(s) within 6 meters (20 feet).
• Minimum heater clearances from combustibles:
Front outlet: 2 m (6 Ft.) Sides: 0.61 m (2 Ft.)
Top: 2 m (6 Ft.) Rear: 0.61 m (2 Ft.)
• Locate heater on stable and level surface if heater is hot or running.
• Keep children and animals away from heater.
• Turn off propane supply and unplug heater when not in use.
• Never block air inlet (rear) or air outlet (front) of heater.
• Never move, handle, or service a hot, operating, or plugged-in heater.
• Do not alter heater. Do not use heater if altered. Keep heater in its original state.
• Never attach duct work to front or rear of heater.
• 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.
WARNING ICON G 001
WARNINGS Continued

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101489
PRODUCT
IDENTIFICATION
Figure 1 - 50,000 BTU/Hr Model
Power
Cord
Hose /Regulator
Assembly
Inlet
Connector
Handle
Shell
Hot Air Outlet
(Front)
Fan Guard
Piezo Ignitor
Button
Automatic
Control Valve
Button
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.
Motor
Start Switch
Button
Heater Base

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Air For Combustion Air For Heating
THEORY OF
OPERATION
Combustion
Chamber
Clean
Heated
Air Out
(Front)
Hose/Regulator
Assembly
Cool Air In
(Back)
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.
Motor
Fan
Figure 2 - Cross Section Operational View
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. 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 9-kg (20-pound) propane tank.
You may need two or more tanks or one larger tank in colder weather. Use a 45-kg
(100-pound) tank for longer operation or in very cold weather. Less gas is vapor-
ized at lower temperatures. Your local propane gas dealer will help you select the
proper supply system.
Average Temperature 0°C -6.7°C -12°C -17.7°C -23.3°C -28.9°C
At Tank Location (32°F) (20°F) (10°F) (0°F) (-10°F) (-20°F)
Number Of Tanks
(45 kg/100-pound) 1111 22

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INSTALLATION
Inlet Connector Hose
Figure 4 - Hose and Inlet Connector
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
2.22 cm (7/8 inch) wrench.
IMPORTANT: Position regulator 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.
WARNING ICON G 001
WARNING
ReviewandunderstandthewarningsintheSafetyInformation
Section, pages 2 and 3. They are needed to safely operate this
heater. Follow all local codes when using this heater.
3. Connect hose to inlet connector. 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 regula-
tor supplied with heater.
Propane
Tank
Propane
Supply
Valve Regulator
Hose
POL Fitting
Figure 3 - Regulator Position
WARNING ICON G001
WARNING
Test all gas piping and connections 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.

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101489
4. Open propane supply valve on propane tank(s) slowly. Note: If not opened
slowly, excess-flow check valve on propane tank will stop gas flow. If this
happens, close propane supply valve and open again slowly.
5. Check all connections for leaks.
WARNING ICON G001
WARNING
Never use an open flame to check for a leak. Apply a mix-
ture of liquid soap and water to all joints. Bubbles forming
show a leak. Correct all leaks at once.
6. Close propane supply valve.
VENTILATION
OPERATION
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 two meters (six feet) long, CSA listed, and of
a proper size.
4. Plug extension cord into a 120 volt/60 hertz, 3-hole, grounded outlet. Depress
start switch for three seconds to start motor and fan. This will force air out
front of heater.
Extension Cord Wire Size Requirements
Up to 15 meters (50 feet) long, use 18 AWG rated cord.
15.5 to 30.5 meters (51 to 100 feet) long, use 16 AWG rated cord.
31 to 61 meters (101 to 200 feet) long, use 14 AWG rated cord.
Continued
IMPORTANT: Provide extra fresh air if more heaters are being used.
WARNING ICON G001
WARNING
Provide at least a 0.14 m2(1.5-square-foot) 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.
WARNING ICON G001
WARNING
Review and understand the warnings in the Safety Informa-
tionsection, pages 2and 3.They areneeded tosafelyoperate
this heater. Follow all local codes when using this heater.
INSTALLATION
Continued

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5. Open propane supply valve on propane tank(s) slowly. Note: If not opened
slowly, excess-flow check valve on propane tank will stop gas flow. If this
happens, close propane supply valve and open again slowly.
OPERATION
Continued
6. Push in and hold automatic control valve button (see Figure 5). Push piezo
ignitor button (see Figure 5). You may need to push piezo ignitor button 3-8
times until the burner lights. When burner lights, keep automatic control valve
button pushed in. Release button after 30 seconds.
Note: If heaterfailstoignite,hosemayhave airinit.Ifso,keepautomatic control
valvebutton pressedandwait20seconds.Releaseautomaticcontrolvalvebutton
and wait 20 seconds for unburned fuel to exit heater. Repeat step 6.
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, page 7.
If heater does not start or restart
• Check manual valves (if any) and supply valves on propane tank. Make sure
they are open.
• Check fuel level in propane tank(s). If fuel level is too low, contact local
propane gas company.
If heater still does not start or restart, contact your local service center.
Automatic Control
Valve Button
Piezo Ignitor
Button
Start Switch
Button
Figure 5 - Automatic Control Valve Button, Piezo Ignitor Button, and
Start Switch Button
WARNING ICON G001
WARNING
Be sure motor and fan are running before pushing in auto-
matic control valve button. Flames could flash outside
heater if motor and fan are not running.

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101489
STORAGE
1. Store propane tank(s) in safe manner. Follow all local codes. Always store
propane tanks outdoors.
2. Place plastic cover caps over brass fittings on inlet connector and hose/regula-
tor 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,
page 11).
MAINTENANCE
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 house-
hold cleaners on difficult spots.
2. Inspect heater before each use. Check connections 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.
4. Have heater inspected yearly by a qualified service person.
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, page 11).
6. Clean fan blades each season or as needed (see Fan, page 12).
WARNING ICON G001
CAUTION
Disconnect heater from propane supply tank(s).
WARNING ICON G001
WARNINGS
•Never service heater while it is plugged in, connected
to propane supply, operating, or hot. Severe burns and
electrical 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.

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101489
TROUBLE-
SHOOTING
Checkvoltagetoelectricalout-
let. If voltage is good, check
heater power cord for breaks.
Adjustmotor/fanguardtokeep
fanfromhittinginsideofheater
shell. Bend fan guard if neces-
sary.
Replace fan. See Fan, page 12.
Replace motor. See Motor,
page 11.
Repeat installation and opera-
tion instructions. See Installa-
tion, page 6 and Operation,
page 7.
A)Checkignitorwire.Tighten
or reattach loose ignitor wire.
SeeFigure13,page13forigni-
tor wire location.
B) Set gap between ignitor
electrode and target plate to
4.32 mm (.17").
C) Tighten nut holding piezo
ignitor to base of heater.
D) Replace ignitor electrode.
See Ignitor, page 13.
This can happen when running
heater in temperatures above
29°C (85°F). Run heater in
cooler temperatures.
Check heater inlet and outlet.
Remove any obstructions.
Replace fan. See Fan, page 12.
WARNING ICON G001
WARNING
Use only in areas free of
high dust content.
Clean heater. See Mainte-
nance, page 9.
Fan does not turn
when heater is
plugged in and start
switch depressed.
Heater will not
ignite.
Heater shuts down
while running.
OBSERVED FAULT POSSIBLE CAUSE REMEDY
No electrical power
to heater
Fan hitting inside of
heater shell
Fan blades bent
Defective motor
Userdidnotfollowinstal-
lation or operation in-
structions properly
No spark at ignitor. To
test for spark, follow step
9 under Ignitor, page 13.
If you see spark at ignitor,
have heater serviced by
qualified service person.
If no spark seen:
A) Loose or disconnected
ignitor wire
B) Wrong spark gap
C) Piezo ignitor loose
D) Bad ignitor electrode
Highsurroundingairtem-
perature causing thermal
limit device to shut down
heater.
Restricted air flow
Damaged fan
Excessive dust or debris
in surrounding area
WARNING ICON G001
WARNING
Never service heater while it is plugged in, connected to
propane supply, operating, or hot. Severe burns and
electrical shock can occur.