Desa PRV125EDI User manual

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.
PORTABLE
FORCED
AIR HEATER
OWNER’S MANUAL
125 SIDE PFA/PV 004
Model PRV125EDI

2
Safety Information.........................................................................3
Introduction ...................................................................................4
Product Identification .................................................................... 4
Unpacking......................................................................................4
Assembly .......................................................................................5
Theory of Operation ......................................................................6
Fuels ..............................................................................................6
Ventilation .....................................................................................7
Operation .......................................................................................7
Storage ........................................................................................... 8
Preventative Maintenance Schedule..............................................8
Troubleshooting.............................................................................9
Service Procedures ........................................................................ 10
Upper Shell Removal ..............................................................10
Fan........................................................................................... 10
Air Output, Air Intake, and Lint Filters .................................. 11
Pump Pressure Adjustment .....................................................11
Fuel Filter ................................................................................ 12
Spark Plug ............................................................................... 12
Nozzle .....................................................................................13
Pump Rotor ............................................................................. 14
Specifications................................................................................. 15
Wiring Diagram.............................................................................15
Accessory ......................................................................................15
Illustrated Parts Breakdown and Parts List....................................16
Wheels and Handles................................................................ 17
Burner Head Assembly ...........................................................18
Motor and Pump Assembly ....................................................18
Warranty and Repair Service......................................................... Back Cover
CONTENTS SECTION PAGE

3
SAFETY
INFORMATION WARNINGS
!
IMPORTANT: Read this owner’s manual carefully and completely
beforetryingtoassemble,operate,orservicethisheater.Improperuse
of this heater can cause serious injury or death from burns, fire,
explosion, electrical shock, and carbon monoxide poisoning.
Carbon Monoxide Poisoning: Early signs of carbon monoxide poisoning
resemble the flu, with headaches, dizziness, and/or nausea. If you have these signs,
theheatermaynotbeworkingproperly.Getfreshairatonce!Haveheaterserviced.
Some people are more affected by carbon monoxide than others. These include
pregnant women, persons with heart or lung disease or anemia, those under the
influence of alcohol, and those at high altitudes.
Makecertainyoureadandunderstandallwarnings.Keepthismanualforreference.
It is your guide to safe and proper operation of this heater.
!
DANGER
Carbon monoxide poisoning may lead to death!
•Use only kerosene or No. 1 fuel oil to avoid risk of fire or explosion. Never use
gasoline, naphtha, paint thinners, alcohol, or other highly flammable fuels.
•Never use heater where gasoline, paint thinner, or other highly flammable
vapors are present.
•Follow all local ordinances and codes when using heater.
•Never use heater without properly installed vent piping and regulator.
•This heater must have fresh air for proper operation. If not, poor fuel combus-
tion and improper venting of flue gases will result. Carbon monoxide poison-
ing from backed-up flue gases could occur.
•Use only in places free of flammable vapors or high dust content.
•Use only with the electrical voltage and frequency specified on model plate.
•Use only a three-wire, grounded (earthed) extension cord.
•Minimum heater clearances from combustibles:
Outlet: 8 Ft. (250 cm) Sides, Top, and Rear: 4 Ft. (188 cm)
•Locate heater on a stable and level surface while hot or running or a fire may
occur.
•When moving or storing heater, keep heater in a level position or fuel spillage
may occur.
•Keep children and animals away from heater.
•Unplug heater when not in use.
•When used with thermostat, heater may start anytime.
•Never use heater in living or sleeping areas.
•Never block air inlet (rear) or air outlet (front) of heater.
•Never move, handle, refuel, or service a hot, operating, or plugged-in heater.
•Never attach duct work to front or rear of heater.

4
INTRODUCTION
Fuel Cap
Lower
Shell
Power Cord
Figure 1 - PRV125EDI
Hot Air
Outlet
Safety Control
Reset Button
Fuel
Tank
Fan Guard
Air Filter
End Cover
PRODUCT
IDENTIFICATION
UNPACKING
Upper Shell
Interrupter
This heater is designed to provide heated air. The heated air is free of harmful
exhaust gases. Vent exhaust gases to the outdoors through a flue pipe, smoke-
stack, or chimney. When using the heater, provide enough air for combustion and
ventilation. Provide proper power supply for the heater.
This manual contains operating, maintenance, and troubleshooting instructions. A
complete parts list is also included.
1. Remove all packing items applied to heater for shipment.
2. Remove all items from carton.
3. Check items for shipping damage. If heater is damaged, promptly inform
dealer where you bought heater.
Exhaust
Gases Outlet

5
ASSEMBLY This heater is furnished with wheels, handles, and an interrupter. These items and
the mounting hardware are found in the shipping carton.
Tools Needed
•Medium Phillips Screwdriver
•3/8" Open or Adjustable Wrench
•Hammer
1. Slide axle through wheel support frame. Install wheels on axle.
IMPORTANT: When installing wheels, point extended hub of wheels toward
wheel support frame (see Figure 2).
2. Place cap nuts on axle ends. Gently tap with hammer to secure.
3. Place heater on wheel support frame. Make sure air inlet end (rear) of heater is
over wheels. Line up holes on fuel tank flange with holes on wheel support frame.
4. Place front handle and rear handle on top of fuel tank flange. Insert screws
through handles, fuel tank flange, and wheel support frame. Attach nut finger
tight after each screw is inserted.
5. After all screws are inserted, tighten nuts firmly.
6. Place interrupter onto combustion chamber. Secure with two screws. Save two
additional screws for mounting vent pipe.
Figure 2 - Wheel, Handle, and Interrupter Assembly
Screw
Hot Air
Outlet
Fuel
Tank
Flange
Wheel
Support
Frame
Wheel
Cap Nut
Nut
Axle Extended
Hub
Air
Inlet
Rear
Handle
Front
Handle
Screw
Interrupter

6
THEORY CUTAWAY 125 EURO
THEORY OF
OPERATION
WARNING
!
FUELS
Use only kerosene or No. 1 fuel oil to avoid risk of fire or
explosion. Never use gasoline, naphtha, paint thinners,
alcohol, or other highly flammable fuels.
Clean
Heated
Air Out
Cool
Air
In
Output
Air
Filter
Figure 3 - Cross Section Operational View
Spark
Plug
Burner
Head Fan
Motor Air Pump
Intake
Air Filter
Nozzle
Heat Exchanger
Outer Shell
Exhaust Gases
Outlet
Exhaust gases cross over
from combustion chamber
to heat exchanger
Fuel
Tank Air line
To Burner Electronic
Ignitor
Exhaust
Gases Air For Fuel
System Air For Combustion And Heating Fuel
The Fuel System: The air pump forces air through the air line. The air is then
pushed through the burner head nozzle. This air causes fuel to lift from the tank.
A fine mist of fuel is sprayed into the combustion chamber.
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.
Exhaust gases are ducted out of the heater through a vent pipe. The user must
supply the vent pipe.
The Ignition System: The electronic ignitor sends voltage to the spark plug.
The spark plug ignites the fuel and air mixture.
The Safety Control System: This system causes the heater to shut down if
the flame goes out.
Do not use heavy fuels such as No. 2 fuel oil or No. 2 Diesel. Using heavy fuels
will result in:
•clogged fuel filter and nozzle
•carbon build up on spark plug
•the need of non-toxic anti-icer in fuel during very cold weather
IMPORTANT: Use a KEROSENE ONLY storage container. Be sure storage
container is clean. Foreign matter such as rust, dirt or water will cause the safety
control to shut down heater. Foreign matter may also require you to clean fuel
system often.

7
VENTILATION WARNING
!
A standard 4 inch (10.16 cm) draft regulator is required only if total vertical and
horizontal length of the vent pipe exceeds 20 feet (6.1 meters). Regulator, vent
pipe, and fittings are not supplied with the heater. Purchase these items at a local
hardware store.
OPERATION
Figure 4 - Ventilation Requirements
125 VENTILATION PFA/PV 023
If horizontal run is
needed, use at least
1 foot (30.48 cm) rise
for each 10 feet (3.05
meters) of run.
Safety Control
Reset Button
(Fan Guard
Removed)
Figure 5 - Safety Control Reset Button
Continued
Never use heater without properly installed vent pipe and
regulator. You must vent heater to the outdoors. This assures
proper combustion and avoids air contamination in the room.
30" (76.2
cm) Mini-
mum
Standard 4 inch
(10.16 cm) draft
regulator (required
if vent pipe ex-
ceeds 20 feet [6.1
meters] in length).
WARNING
!
Review and understand the warnings in the Safety Informa-
tion Section. They are needed to safely operate this heater.
Follow all local codes when using this heater.
To Start Heater
1. Follow all ventilation and safety information.
2. Fill fuel tank with kerosene or No. 1 fuel oil.
3. Attach fuel cap.
4. Plugpowercordinto standard 230 volt/50hertz,grounded(earthed)outlet.Use an
extensioncordifneeded.Useonlyathree-wire,grounded(earthed)extensioncord.
Extension Cord Wire Size Requirements
Up to 100 feet (30.5 meters) long, use 16 AWG (1.0 mm2) conductor
101 to 200 feet (30.6 to 61 meters) long, use 14 AWG (1.5 mm2) conductor
Heater will start when power cord is plugged into outlet. If not, push in safety
control reset button (see Figure 5).

8
OPERATION
Continued
To Stop Heater
1. Unplug power cord from outlet.
To Restart Heater
1. Wait 2 minutes after stopping heater.
2. Repeat steps under “To Start Heater,”page 7.
WARNING
!
PREVENTATIVE
MAINTENANCE
SCHEDULE
STORAGE 1. Drain fuel tank. Locate drain plug on underside of fuel tank. Remove drain
plug to drain all fuel. Be sure all fuel is removed.
2. Replace drain plug.
3. Add one gallon (4 liters) of clean kerosene to fuel tank.
4. Attach fuel cap.
5. Move heater forwards and backwards to stir fuel.
6. Remove drain plug and drain fuel tank. Be sure all fuel is removed.
7. Replace drain plug. Properly dispose of old and dirty fuel.
8. Store heater in dry place. Make sure storage place is free of dust and corrosive
fumes.
IMPORTANT: Do not store kerosene over summer months for use during next
heating season. Using old fuel could damage heater.
Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
Item How Often How To
Fuel tank Flush every 150-200 hours See Storage above.
of operation or as needed.
Air output and Replace every 500 hours of See Air Output, Air Intake,
lint filters operation or once a year. and Lint Filters, page 11.
Air intake Wash and dry with soap and See Air Output, Air Intake,
filter water every 500 hours of and Lint Filters, page 11.
operation or replace as needed.
Fuel filter Clean twice a heating season See Fuel Filter, page 12.
or replace as needed.
Spark plug Clean and regap every 600 See Spark Plug, page 12.
hours operation or replace
as needed.
Fan blades Clean each season or as needed. See Fan, page 10.
Motor Not required/permanently lubricated

9
WARNING
!
TROUBLE-
SHOOTING
OBSERVED FAULT POSSIBLE CAUSE REMEDY
Wrong pump pressure
Dirty air output, air intake
and lint filters
Dirty fuel filter
Dirt in nozzle
Dirty photocell lens
Bad safety control
See Pump Pressure
Adjustment, page 11.
See Air Output, Air Intake
and Lint Filters, page 11.
See Fuel Filter,
page 12.
See Nozzle, page 13.
Clean photocell lens.
Replace safety control.
Heater ignites, but
safety control shuts
off heater after a
short period of time.
Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
Wrong pump pressure
Carbon deposits on spark
plug and/or improper
gap
Dirty fuel filter
Dirt in nozzle
Water in fuel tank
Electronic ignitor not
grounded (earthed)
Bad electronic
ignitor
See Pump Pressure
Adjustment, page 11.
See Spark Plug, page 12.
See Fuel Filter,
page 12.
See Nozzle, page 13.
Drain and flush fuel
tank with clean
kerosene. See Storage,
page 8.
Make sure electronic ig-
nitor mounting is tight.
Replace electronic
ignitor.
Heater will not
ignite, but motor runs
for a short period of
time.
WARNING: High voltage!
!
Motor does not start
when heater is
plugged in, fan turns
slowly or does not
turn.
Safety control not reset
Binding pump rotor
Reset safety control
button (see Figure 5,
page 7).
If fan is hard to
turn, see Pump Rotor,
page 14.

10
SERVICE
PROCEDURES WARNING
!
Upper Shell Removal
1. Remove screws along each
side of heater using 5/16"
nut-driver. These screws
attach upper and lower
shells together.
2. Lift upper shell off.
3. Remove fan guard.
125 SHELL REMOVAL PFA/P 050
Upper
Shell
Fan Guard
Figure 6 - Upper Shell Removal
Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
Fan
IMPORTANT: Remove fan
from motor shaft before
removing motor from heater.
The weight of the motor
resting on the fan could
damage the fan pitch.
1. Remove upper shell (see
above).
2. Use 1/8" Allen wrench to
loosen setscrew which
holds fan to motor shaft.
3. Slip fan off motor shaft.
4. Clean fan using a soft cloth
moistened with kerosene or
solvent.
5. Dry fan thoroughly.
6. Replace fan on motor
shaft. Place fan hub flush
with end of motor shaft
(see Figure 8).
7. Place setscrew on flat of
shaft. Tighten setscrew
firmly (40-50 inch-pounds/
4.5-5.6 n-m).
8. Replace fan guard and
upper shell.
Setscrew Fan
Motor
Shaft
Figure 7 - Fan, Motor Shaft, and Setscrew Location
Setscrew
Motor
Shaft
Fan
Flush
Figure 8 - Fan Cross Section