Toyotomi Oil Miser OM-22 User manual

VENTED HEATER SERVICE MANUAL
OM-22 (Type B, C, D)
Oil Miser 23 (Type E)
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LASER HEATING SYSTEMS
Table of Contents
1- 1 Introduction
1- 2 Physical Specifications
1- 3 Description of Functions
1- 4 Description
1- 5 Combustion System
1- 6 Combustion Chamber
1- 7 Burner
1- 8 Burner Ring Assembly
1- 9 Burner Coating
1-10 Flame Rod Sensor
1-11 Igniter
1-12 Forced Flue Venting System
1-13 Flue Pipe
1-14 Blower Motor Assembly
1-15 Air Circulation Fan
1-16 Fuel Delivery System
1-17 External Fuel Tank
1-18 Fusible Link Valve
1-19 Fuel Sump
1-20 Fuel Pump
1-21 Electrical System
1-22 Control Circuit Board
1-23 Room Temperature Sensor
1-24 Safety Mechanisms
1-25 Power Failure Recovery System
1-26 Cloth Covered Exhaust Pipe
1-27 Fuse
1-28 Overheat Protector Switch
1-29 Pressure Relief Plate
1-30 Igniter Cleaning System
2- 1 Introduction
2- 2 Physical Placement of Heater
2- 3 Drilling Requirements
2- 4 Power Requirements
2- 5 Fuel Tank Requirements
2- 6 Room Temperature Sensor Wiring
Requirements
2- 7 Building Codes
2- 8 Unpacking
2- 9 Heater Installation
2-10 Typical Fuel Lifter
Pump Installations
2-11 Fuel Tank Installation
2-12 For High Altitude Use
3- 1 Introduction
3- 2 Operating Specifications
3- 3 Operating Controls and Indicators
3- 4 Pre-Operation Check List
3- 5 Before Operation
3- 6 Operation
3- 7 Power Saver Operation
3- 8 Timer operation
3- 9 Room Temperature Sensor
3-10 Turning Heater Off
3-11 Manual Combustion System for
Testing Purposes
3-12 Power Failure Recovery System
3-13 Recovery from Overheat Condition
Description
Page 1-6
Page 7-14
Page 15-21
Installation
Operation
Section 1
Section 2
Section 3
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LASER HEATING SYSTEMS
Table of Contents
4- 1 Introduction
4- 2 Routine Maintenance
4- 3 Inspect Intake/Exhaust Air Lines
4- 4 Verify Igniter Operation
4- 5 Clean Fuel Inlet Strainer
4- 6 Replacement of Fuses
4- 7 Fuel Contamination
5- 1 Introduction
5- 2 Cleaning the Heat Exchanger and
Burner
5- 3 Removal of Water Deposits and
Contaminants from Fuel Sump and
Fuel Lines
5- 4Cleaning the Fuel Filter or Water
Block Filter
5- 5 Error Message
6- 1 Electrical System
6- 2 Schematic Wiring Diagram
6- 3 Resistor/Capacitor Value
6- 4 Control Circuit Board Time Chart
6- 5 Trouble Shooting Guide
6- 6 Parts Description
Page 22-25
Page 26-28
Page 29-45
Maintenance
Servicing
Trouble Shooting
Section 4
Section 5
Section 6
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LASER HEATING SYSTEMS
1SERVICE MANUAL
Description
The Laser Heating System is a completely new type of
sophisticated and fuel-efficient vented system featuring
its own housing, combustion and air circulation systems
and a micro computer control system.
In addition to superior design and technology, rigorous
testing for quality and safety have made the Laser
Heating System unmatched for efficiency, convenience,
economy and flexibility. Plus, the Laser is easy to
maintain nand requires minimal service.
The following section outkines the Laser Heater and its
various components
Listed below, are the physical specifications that apply
to the Laser:
OM-22/23
W × D × H (inches):
19-5/8 "× 16-1/2" × 23-5/8"
(496 × 418 × 600mm)
Weight: 38 lbs. (17kg)
Flue Pipe Hole: 2-3/4 to 3" diameter
(70 to 80mm)
See Fig. 1-1.
The heating cysle begins with a purge of any existing
fuel vapors along with a pre-heat period. The fuel and air
are then delivered to the heated burner, resulting in
ignition.
After several minutes of low and medium mode
combustion, the circulation fan starts to blow air through
the heat exchanger and automatically maintains the
proper burn rate. When the room temp. increaces
sufficiently, the heater shuts down and goes through a
post-purge mode for approx. 3 minutes.
OM-22/23 is equipped with a programmable timer which
allows for fully automatic operation 24 hours a day. The
heater will rum at four stages "HIGH", "MEDIUM",
"LOW" and "OFF" cycle to maintain the desired
temperature setting.
The OM-22/23 is composed of the following:
•Adrip tray
•Acabinet
•Aforced flue venting system
•Acombustion system
•An air circulation system
•Afuel delivery system
•Electrical and electronics systems
•Avariety of safety mechanisms
In the combustion system a mixture of fuel and air is
burned to produce heat. Air is drawn from outside the
dwelling to the burner. At the same time, fuel is metered
from a storage tank into this same burner. Within the
burner, the air/fuel mixture is ignited to produce heat.
The Laser combustion systems are safeguarded by an
overheat protector switch that will shut down the heater
(to protect it from damage) in the event of excessive
heat build-up. The error code "EE12" will be displayed
on the digital indicator at this time. The overheat
protector switch will be reset after the cooling down
period. Turn the ON/OFF switch to "ON" again to restart.
Section 1
1-1 INTRODUCTION
SHUTDOWN
OFF
HEATING
POST-PURGE
COMBUSTION
IGNITION
Figure 1-1 SIMPLIFIED OPERATIVE CYCLE
1-2 PHYSICAL SPECIFICATIONS
1-3 DESCRIPTION OF FUNCTIONS
1-4 DESCRIPTION
1-5 COMBUSTION SYSTEM
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SERVICE MANUAL 2
LASER HEATING SYSTEMS
Description
The combustion chamber consists of two main parts;
one is the heat chamber and the other is the heat
exchanger. The combustion chamber is secured to the
top of the burner. The heat chamber has a window,
allowing the serviceman to visually examine the
combustion process (i.e. glowing igniter or proper
flame). The exhaust vapors pass through the heat
exchanger. While exhaust vapors are moving through
the heat exchanger, the heat is extracted from the heat
exchanger by the air circulation fan.
The burner is positioned on the cabinet base.
The burner has a double wall construction and contains
an igniter tube, a fuel inlet fitting and a series of air holes
on the inner wall.
Connected to the burner are the igniter (located within
the burner) , a fuel line and a flame sensor. Within the
burner is the burner ring. An airway on the rear panel
channels air from the intake fan of the combustion
blower to the burner. The flame rod sensor is mounted
through the wall of the burner.
This assembly is designed to promote efficient burning.
The burner ring assembly is held by spring clops to
mounting posts within the burner.
The textured burner coating insures the even
vaporization of fuel for proper combustion.
The flame rod sensor checks the condition of the flame
for proper burning.
The flame rod sensor is mounted through the wall of the
burner.
The ceramic-type igniter is designed to pre-heat the burner
pot and to vaporize and ignite the air/fuel mixture to start
the combustion process.
The forced flue venting system channels air to and from the
heater. Outside air is drawn into the heater by the combustion
blower through the flue pipe and is blown into the burner. It
then combines with the vaporized fuel and ignites.
As the heated air passes through the heat exchanger, a
room air circulation fan blows air past the heat exchanger
and out again into the room from the front of the heater.
Exhaust vapors are vented out of the room through the
flue pipe.
The wall thickness which the flue pipe can be installed is from
4 in. to 9 in. The extension flue pipe (option) is available for
installation in wall thickness from 9 in. to 13 in. This provides
the flexibility to meet the installation requirements of dwellings
of various wall thicknesses up to 13 inches (330 mm).
The flue pipe assembly is a “pipe-within-a-pipe” design
which consists of two concentric tubes. Outside air is drawn
through the cylindrical space between the tubes.
Combustion by-products are vented through the inner tube.
As cool air the enters the flue pipe, it is heated by the hot
air that is exiting the system.
The turbo fan is used for the combustion blower on the
intake air side only. The exhaust gas is expelled through
the flue pipe.
The OM-22 blower motor has a 3-speed. A magnetic
sensor insures proper fan speeds for each burning mode.
The blower motor will keep running for 180 seconds
after the heater is turned off to exhaust vapor in the
system and cool off the unit.
Section 1
1-6 COMBUSTION CHAMBER
1-7 BURNER
1-8 BURNER RING ASSEMBLY
1-9 BURNER COATING
1-10 FLAME ROD SENSOR
1-11 IGNITER
1-12 FORCED FLUE VENTING SYSTEM
1-13 FLUE PIPE
1-14 BLOWER MOTOR ASSEMBLY
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LASER HEATING SYSTEMS
3SERVICE MANUAL
Description
The air circulation fan forces room air through the heat
exchanger, then out of the louvered front panel to be
distributed throughout the room. The OM-22 circulation
fan motor has three speeds. The circulation fan will keep
running for 180 seconds after the heater shuts down.
This cools the heater.
Fuel moves by gravity from the external fuel storage
tank to the fuel sump.
Fuel must be maintained at the level corresponding to
the burn mode so that combustion can be conducted
efficiently.
The fuel pump meters the flow of fuel from the fuel sump
to the burner through a copper fuel pipe and a fuel
nozzle.
The external tank (which generally is dealer installed)
should contain at least one shutoff valve, a fuel filter and
a vent. Installation of the tank should conform to local
regulations.
The fusible link valve is mounted as a standard item.
Located inside on the base of the heater cabinet, it is
connected to the fuel sump. The fusible link valve is a
spring-loaded device that cuts off the supply of fuel to
the heater when the temperature level (at the valve)
exceeds a predefined maximum limit.
The constant level valve has an automatic shutoff safety
mechanism that prevents fuel from flooding or
overflowing from the fuel sump.
A manual reset button allows the valve to resume
operation after the heater has been moved.
Fuel enters the constant level valve through an inlet at
the bottom. As the level of fuel rises, it passes through a
fuel inlet strainer which removes most particles and
foreign matter from the fuel and then it flows up through
an open inlet valve and enters the tank. See Fig. 1-2.
The fuel pump is mounted on top of the fuel sump. The
pump assembly consists of the pump solenoid and the
control circuit.
All electronic diagrams, such as the wiring diagram, the
circuit board layout, and the electrical schematic can be
found in Section 6 of this Service Manual.
Section 1
1-15 AIR CIRCULATION FAN
1-16 FUEL DELIVERY SYSTEM
1-17 EXTERNAL FUEL TANK
1-18 FUSIBLE LINK VALVE
1-19 FUEL SUMP
(FUEL CONSTANT LEVEL VALVE)
IMPORTANT: Within the valve, a float mechanism
controls the level of fuel in the
sump. As the fuel level drops, the
float drops down to increase the
inlet valve opening to admit more
fuel into the sump. When the fuel
level reaches its maximum volume,
the float rises to shut the valve.
In the event that fuel within the
sump rises to an abnormally high
level, the float within the sump rises.
A trip magnet pulls the float up and
closes the valve to prevent fuel from
entering into the sump.
Should a foreign substance cause
the inlet valve to stick (or prevent it
from opening), the reset button is
utillized to free the mechanism and
to admit fuel to the sump.
The fuel inlet strainer should be
cleaned or replaced periodically.
Time intervals will depend on purity
and quality of fuel.
CAUTION: Care must be taken to prevent dust, dirt
or other debris from clogging or
blocking the inlet valve.
1-20 FUEL PUMP
1-21 ELECTRICAL SYSTEM
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SERVICE MANUAL 4
LASER HEATING SYSTEMS
Description
Section 1
The control circuit board provides safety timings,
controls relays and provides clock and thermostat
functions for the Laser Heater.
The room temperature sensor, which is capable of
sensing room temperature within range of 50°F (10°C)
to 90°F (32°C), can be wall mounted.
Approx. 8 feet (2.5 m) of wire is supplied with the sensor
to facilitate wall mounting is a favorable location. You
can also use radio wire of speaker wire to extend the
mounting location up to 20 feet (6m).
Figure 1-2 FUEL SUMP (FUEL CONSTANT LEVEL VALVE) (Part #20478534)
1-22 CONTROL CIRCUIT BOARD 1-23 ROOM TEMPERATURE SENSOR
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LASER HEATING SYSTEMS
5SERVICE MANUAL
Description
Several safety mechanisms have been built into the
Laser Heating System. These devices protect the user
against personal injury, protect the heater against
damage, shut down the heater and display an error code
on the digital indicator if a malfunction occurs.
When an electric power failure occurs while the heater is
in operation, the heater will automatically re-start after
the power is restored.
Insulating cloth covers are to be placed over all metal
surfaces of the exhaust line during installation. Since
combustion by-products are vented at elevated
temperatures, the exhaust pipe will become hot during
operation. The insulating cloth covers protect the user
from accidental contact burn with these heated metal
surfaces.
In the event of a power surge or an internal wiring
hazard, the fuses will open and power to the heater will
be cut off. The fuses are rated at 125 V AC, 10-amps
and 125 V AC, 3-amps.
The electrical outlet into which the heater connected
should be protected by at least a 15-amp. fuse or circuit
breaker.
Overheat protector switch is rated at 195°F (90°C).
Should a heater overheat (internal temperature rises
beyond 195°F (90°C)), the overheat protector switch
(also called a high limit switch) will open to shut off the
heater. Error code “EE12” will be displayed on the digital
indicator at this time. The overheat protector switch will
automatically reset after the heater has cooled down.
Once the heater has cooled to 150°F (65°C), the system
can be restarted manually as follows:
1. Press ON/OFF switch to “OFF”.
2. Allow heater to cool down.
3. Resolve the cause of the overheat.
4. Press ON/OFF switch to “ON” to start.
The heater will start with normal operation.
The pressure relief plate is provided at the upper part of
the heat exchanger, which effectively prevents a
explosion burning when caused by misfire.
The igniter cleaning mode prolongs the igniter life.
The heater will automatically clean igniter everyday at
2:00 a.m. and display “CL” on digital indicator if heater is
running at that time. To clean igniter heater will
automatically stop at 2:00 a.m. and automatically re-
ignite and continue burning again.
Section 1
1-24 SAFETY MECHANISMS
1-25 POWER FAILURE RECOVERY
SYSTEM
1-26 CLOTH COVERED EXHAUST PIPE
IMPORTANT: Do not operate the heater without
the insulating covers. During
installation make sure that all
exhaust lines are tightly connected.
1-27 FUSE
1-28 OVERHEAT PROTECTOR SWITCH
1-29 PRESSURE RELIEF PLATE
1-30 IGNITER CLEANING SYSTEM
IMPORTANT: The digital clock on the heater
must be set to the correct time.
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SERVICE MANUAL 6
LASER HEATING SYSTEMS
Description
Section 1
Model OM-22/23
Figure 1-3 CONSTRUCTION
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LASER HEATING SYSTEMS
7SERVICE MANUAL
Installation
Installing the Laser System at the user's location can be
performed quickly and economically.
OM-22 model is strictly an externally fueled system, is
fully vented and will need the installation of an external
fuel storage tank.
By completing each step of the easy-to-follow
installation instruction (each step should be completed in
the exact order specified), the technician is directed
through the installation process.
This section contains all relevant installation information
including:
•Installation specifications
•List of installation tools
•Alternative types of venting systems
(and installation procedures for each)
•Basic requirements for fuel tank installation
•Instructions to install the Laser System
The heater can be located almost anywhere within the
dwelling provided that electrical, fuel, and exhaust
specifications are met.
In addition to the space taken up by the heater, interior
space must also be reserved for free air circulation.
Remove all combustibles from the heating area.
Unless building or fire codes dictate otherwise, the Laser
System can be placed on any floor surface (including
carpeting or other combustible material) and provide safe
operation. Check clearances as instructed in Figure 2-1.
Through-the-wall flue pipe installation requires that a 2-
3/4" to 3" (70 to 80 mm) hole be drilled through the
dwelling wall (interior or exterior). The hole must be
pitched downward toward the outside at an approx.
angle of 3 degrees.
The appropriate wall area (in which hole will be drilled)
must contain no internal obstacles such as piping,
wiring, air ducts or studs.
RECOMMENDED TOOL KIT FOR SERVICE TECHNICIANS
1) #2 Phillips Head Screwdriver
2) Steel Tape Measure
3) Felt Tip Pen or Pencil
4) Caulking Material (exterior grade)
5) Electrical Drill (reverse capability recommended)
6)
Hole Saw, Saber (Jig) Saw or other appropriate
tool for cutting a 2-3/4" to 3" (70 to 80 mm)
diameter hole for flue pipe
7) Long Drill Bit-1/2"
8) 1/4" ×6" Standard Screwdriver
9) Adjustable Wrenches (various sizes)
10) Copper Tubing Cutter
11) Copper Tubing Flaring Tool
12) Volt, OHM, Meter with shielded probes
13) Level (small circular type)
14) Plumber's Pipe Thread Tape
15) Small Assortment of Self-Tapping Screws
16)
Assorted Pliers (Slip Joint, Needle nose, Cutting,
Lock Joint)
17) Phenolic Probe or Insulated Screwdriver
18) Floor Mat to cover carpeting
19) Quart Size Pan for draining fuel
Section 2
2-1 INTRODUCTION
IMPORTANT: Before beginning installation of the
Laser Vented Heating System
(including any electrical wiring and
fuel supply equipment), check local
building, electrical, mechanical and
fire codes. The requirements of
these codes must be followed to
insure lawful installation and use.
IMPORTANT: The heater is designed to be used
no more than 3000 FT. (1000 m)
above sea level.
If using at a altitudes higher than
3000 FT. (1000 m) above sea
level, follow the procedure on
paragraph 2-12.
2-2 PHYSICAL PLACEMENT OF HEATER
2-3 DRILLING REQUIREMENTS
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SERVICE MANUAL 8
LASER HEATING SYSTEMS
Installation
Line current to the system should be 120 V AC at 60 Hz.
The electrical system should be protected against
current overload by means of at least a 15-amp. fuse or
circuit breaker.
NOTE: The wall outlet should supply electricity for the
Laser System only. Do not connect any other
electrical appliance to it.
Heater fuel (No.1 fuel oil or No.2 fuel oil only) can be
stored in externally located storage tanks ranging from
55 gallon (200R) drums to 275 gallon (1000R) tanks.
When using large tanks a pressure regulator with a max.
of 2.5 PSI should be installed near the heater inlet.
A wall-mounted temperature sensor gauges room
temperature to automatically regulated the heating
cycles of the Laser System. The standard sensor wire is
8 feet (2.5 m) long and can be mounted on a wall. You
can also use radio wire or speaker wire to extend the
mounting location up to 20 feet (6m).
Fire regulations, as well as electrical and other local
building codes, may govern the installation and use of a
vented heater and related fueling systems. Prior to
installation, check and comply with all codes. Additional
requirement may be met for Mobile Home installation.
Save all shipping materials until the Laser has been
completely installed and is working properly.
A. Remove or cut the two plastic straps that hold the
shipping carton together.
B. Lift off the carton top.
C. Remove the template and the Owner's Manual from
the shipping carton.
NOTE: The dealer should complete the registration
card at time of customer purchase and return it
to TOYOTOMI U.S.A., INC. as soon as
possible.
D. Remove the flue pipe kit from shipping carton.
E. Remove the shipping carton.
F. Remove the plastic bag covering the heater.
G. Remove the plastic bags containing the heater parts
and set it aside.
H. Firmly grasp cabinet handles (one on each side of
heater cabinet) and lift heater from the cardboard
shipping base.
I. Remove the flue pipe from the cardboard shipping
base.
J. Check for parts as listed in Laser Owner's Manual.
Section 2
2-4 POWER REQUIREMENTS
2-5 FUEL TANK REQUIREMENTS
WARNING: The Laser power cord must be
plugged into a directly accessible wall
outlet. Do not use an extension cord to
make this electrical connection.
WARNING: Installation of any externally located
fuel tanks must comply with all local
standards and/or building codes.
2-6 ROOM TEMPERATURE SENSOR
WIRING REQUIREMENTS
CAUTION: Choose a location for the sensor that is
not in the path of direct sunlight, draft or
the flow of warm air from the heater, as
this will cause an inaccurate
temperature reading.
2-7 BUILDING CODES
2-8 UNPACKING
IMPORTANT: Only the standard-size flue pipe is
shipped with the heater. Only
through the wall installation will be
permitted. No extension kits are to
be used with the OM-22.
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LASER HEATING SYSTEMS
9SERVICE MANUAL
Installation
Section 2
Not less than 2 ft.
Combustible object
Not less
than 1 ft.
Not less
than 1.5 ft.
Not less
than 1.5 ft.
*Not less
than 8 in.
Not less
than 2 ft.
Combustible object
45°
Flue pipe
* Be sure this
clearance will
be maintained
after snowfalls,
etc.
More than 1 ft. More than 1 ft.
More than 5 ft.
More than 2 ft.
More than 4 inches
OVERHEAD CLEARANCE FOR FLUE PIPE FRONTAL AND SIDE CLEARANCES
FOR FLUE PIPE
HEATER CLEARANCE
Noncombustible
object
Figure 2-1 HEATER/FLUE PIPE CLEARANCE
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SERVICE MANUAL 10
LASER HEATING SYSTEMS
Installation
Section 2
Wind break
Strong wind
Not less than
1.5 ft. (45 cm)
Not less than
1.5 ft. (45 cm)
IMPORTANT: In open areas with strong wind, a wind break may be necessary.
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LASER HEATING SYSTEMS
11 SERVICE MANUAL
Installation
In choosing a location for your Laser Vented Heater, the
following safety tips must be considered.
•Intake and exhaust flue pipe openings must be
fully exposed to outside air. Do not vent into
garage, basement, under the floor, or into any
enclosed area.
•Do not install flue pipe in close proximity to other
objects or materials. See Figure 2-1.
•Before making a hole in your wall for the flue pipe,
make sure the area is free of electrical wires, gas
pipes and other obstacles.
•Do not install flue pipe where it will be exposed to
heavy snow, collected leaves or strong drafts. See
Figure 2-2.
•Do not install the flue pipe down from the heater.
•Do not install the flue pipe into a chimney.
NOTE: After using the installation template as a guide
for drilling the flue pipe hole, the Laser flue pipe
can be normally installed according to the
illustration procedure in the Owner's Manual.
If the template was misplaced or the unit is to
be relocated, the approx. flue pipe hole
location measurements are as follows:
Section 2
2-9 HEATER INSTALLATION
Fuel inlet
Air intake mouth
2-1/2”
(63mm)
2-9/16”
(65mm)
R7-1/2”
(R190mm)
4-1/2” (115mm)
1-3/4” (45mm)
7-11/16”
(195.5mm)
Exhaust
mouth
9-7/8”(252mm)
17-3/8”(442mm)
R7-1/2”
(R190mm)
1-3/4” (45mm)
Figure 2-3 TEMPLATE
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SERVICE MANUAL 12
LASER HEATING SYSTEMS
Installation
For more detailed information, see a fuel lifter pump
manual.
Section 2
2-10 TYPICAL FUEL LIFTER PUMP
NOTE: Pressure reducing valve required if lifter is
more than 8 ft. (2.5 m) higher than fuel inlet
to heater. Limit: 2.5 LBS/SQ in MAX
Fuel lifter pump
location example
Fuel tank
FUEL LIFTER PUMP FUEL LIFTER PUMP
FUEL LIFTER PUMP/GRAVITY FUEL LIFTER PUMP
(Can be located behind the heater)
Figure 2-4
Fuel
tank
Fuel lifter
pump
location
example
NOTE: Pressure reducing valve required if lifter is
more than 8 ft. (2.5 m) higher than fuel
inlet to heater. Limit: 2.5 LBS/SQ in MAX
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LASER HEATING SYSTEMS
13 SERVICE MANUAL
Installation
Fuel tank installation is illustrated (Figure 2-5). Since fuel
tank installation techniques vary from place to place
(ofter dependent upon applicable codes), a particular
installation procedure cannot be specified. However,
certain criteria govern the fuel hook-up of the heater.
Use the following check list as a guide to the fuel
storage facilities.
Fueling Options Available
Fueling of the Laser Heating Systems can be
accomplished in one of two ways:
1. Gravity-fed large capacity external tank:
Practical for large heating needs where bulk delivery
of fuel is available. This system should be installed
by a qualified plumber or fuel supply technician.
2. Large capacity external tank with pump (*):
For large heating needs where a gravity-fed system
is not practical, an electric pump (the fuel lifter
pump) may be used.
(*) The inlet pressure to the heater must not exceed
2.5 psi. Use a pressure reducing valve with a 2.5
psi max. rating.
To install a large capacity, gravity-fed external tank,
follow the instructions below. Use of a qualified installer
is recommended.
•Installation height of the bottom of the fuel tank
should be 16 inches (40 cm) or more above the
floor surface on which the heater stands. This
insures that inlet fuel pressure will be sufficient.
The top of the fuel tank should be no higher than
8-1/2 feet (2.6 m) above the floor under the
heater. This insures that inlet fuel pressure will
not be excessive.
•The horizontal length of piping should not
exceed 100 feel (30 m) and should be free of
sharp bends or obstructions.
•Piping should include no inverse U-type bends
(to avoid air locks, which could block the fuel
supply).
•Awater block filter recommended for use on the
fuel line near tank, and a shutoff valve should
installed on the tank.
•Flare connections should be used at the fusible
link valve connection on the heater and at the
fuel filter to be installed at the tank.
•Use of a shutoff valve just before line enters
building will minimize fuel to be drained should
heater require service.
•If fuel line inside building is more than 3 ft. (90
cm), use another shutoff valve for the above
reason.
•The fuel tank should be located no closer than 6
feet (1.8 m) to a source of heat.
•The fuel tank should have an opening for filling
on the top and a vent with a weather-proof cap
on the side. On some tanks the vent and fill
spout use the same opening.
•3/8" OD copper tubing should be used for fuel
line.
•External tank installation must comply with
National Fire Protection Association Code
NFPA31 or locally applicable codes. Check with
local building officials.
Section 2
2-11 FUEL TANK INSTALLATION
WARNING: Use only No.1 fuel oil or No.2 fuel oil.
Never use gasoline, white gas, camp
fuel or other flammable liquids. Use of
such fuels can result in an explosive
fire and cause severe injury.
IMPORTANT: Make sure that fuel line is free from
any particles of cutting the fuel pipe.
Otherwise it may cause trouble on
the fuel sump.
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SERVICE MANUAL 14
LASER HEATING SYSTEMS
Installation
Section 2
81/2ft.maximum
3/8in.OD copper tubing
Fusible link valve Shut-off valve
Fuel filter
Tank vent
Outdoor fuel tank
Loop
16in.minimum
Figure 2-5 FUEL LINE CONNECTION
The heater is designed to be used no more than 3000
FT. (900 m) above sea level.
For between 3000 FT. to 5000 FT. (900 m to 1500 m)
use, the following proedure should be used:
•Pull jumper connector out of terminal board “CN1”,
and insert the jumper connector into terminal board
“CN2”. (See Fig. 2-6.)
2-12 FOR HIGH ALTITUDE USE
Figure 2-6 MAIN CIRCUIT BOARD
(HIGH ALTITUDE USE)
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LASER HEATING SYSTEMS
15 SERVICE MANUAL
Operation
The OM-22/23 is an easy-to-operate vented heater.
Routine operation features high BTU output, automatic
adjustment of room temperature, low fuel and power
consumption, and choice of automatic or manual heater
operation.
The section provides all information necessary to
operate the Laser Heating System. All operation
procedures specified should be performed in the order in
which they are described.
The following specifications apply to the operation of
OM-22/23.
•Rated Efficiency
(as applied to kerosene heaters): 90% (*)
•Rated Efficiency
(as applied to central heating system): 83% (*)
•Fuel Source: external tank
•Potential Heating Area: 920 sq. FT (0°F)
1150 sq. FT (20°F)
(*) The energy from the combustion process is
released in the form of heat and vaporized water.
Normally, heating systems discharge water from
combustion to the atmosphere without condensing
it. The 90% efficiency rating means that, assuming
the water cannot be condensed, 90% of the heat
produced by the combustion process is recovered.
Assuming the water can be condensed, the
efficiency is 83%.
NOTE: Actual effective heating area depends upon
numerous factors such as type and severity of
climate, type of dwelling construction, condition
of dwelling, and thickness and effectiveness of
dwelling insulation.
Table 3-1 lists OM-22/23 performance specifications at
user-selected heat output settings.
Section 3
3-1 INTRODUCTION
3-2 OPERATING SPECIFICATIONS
Low
8,000
0.060
Rating (BTU/hr)
Fuel consumption (gal/hr)
Setting
Medium
15,000
0.113
Specifications for OM-22/23
High
22,000
0.165
Table 3-1 HEATER PERFORMANCE SPECIFICATIONS
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SERVICE MANUAL 16
LASER HEATING SYSTEMS
Operation
Section 3
1. ON/OFF switch:
Main switch turns heater on and off. When switched
on, heater begins operation and combustion starts
after preheat period.
2. Power saver button:
The button turns power saver operation mode on and
off.
3. Timer button:
The button turns operation mode on and off.
4. Temp./Timer/Clock set:
Temp./Timer/Clock set modes can be set by pressing
UP-HOUR or DOWN-MIN buttons.
5. Power lamp:
Lights on when heater is in operation and flashes when
heater is in pre-purge or post purge.
6. Power saver lamp:
Lights on when heater runs in power saver operation
mode.
7. 2nd timer lamp:
Lights on when heater runs in 2nd timer setting mode.
8. 1st timer lamp:
Lights on when heater runs in 1st timer setting mode.
9. Digital indicator:
Displays clock, set temperature, room temprature and
error code.
10. Temperature lamp:
Lit - Digital indicator shows set and
room temperature.
Flashing - Set temperature can be changed.
11. Clock lamp:
Lit - Digital indicator shows current time.
Flashing - Current time can be changed.
12. Timer lamp:
Flashing - Timer setting can be changed.
13. AM lamp / 14. PM lamp:
Lit - Digtal indicator shows current time.
Flashing - Current time can be changed.
Figure 3-1 CONTROL PANEL
3-3 OPERATING CONTROLS AND
INDICATORS
The following operating controls are used to run the
heater and you monitor its preformance by indicator
lamps.
1st TIMER 2nd TIMER POWER SAVER UP/HOUR DOWN/MIN ON POWER OFF
POWER SAVER
2nd TIMER
1st TIMER
TEMP
SET ROOM
CLOCK
TIMER
3. Timer button
2. Power saver button
1. ON/OFF switch
4. Temp. / Timer / Clock set
5. Power lamp
10. Temperature lamp
11. Clock lamp
12. Timer lamp
9. Digital indicator
7. 2nd TIMER lamp
8. 1st TIMER lamp
6. Power saver lamp
OM-22
1st TIMER 2nd TIMER POWER SAVER UP/HOUR DOWN/MIN ON POWER OFF
POWER SAVER
2nd TIMER
1st TIMER
TEMP
SET ROOM
AM
PM
3. Timer button
2. Power saver button
1. ON/OFF switch
4. Temp. / Timer / Clock set
5. Power lamp
10. Temperature lamp
13. AM lamp
14. PM lamp
9. Digital indicator
7. 2nd TIMER lamp
8. 1st TIMER lamp
6. Power saver lamp
OM-22
1st TIMER 2nd TIMER POWER SAVER UP/HOUR DOWN/MIN ON POWER OFF
POWER SAVER
2nd TIMER
1st TIMER
TEMP
SET ROOM
AM
PM
3. Timer button
2. Power saver button
1. ON/OFF switch
4. Temp. / Timer / Clock set
5. Power lamp
10. Temperature lamp
13. AM lamp
14. PM lamp
9. Digital indicator
7. 2nd TIMER lamp
8. 1st TIMER lamp
6. Power saver lamp
Oil Miser 23 (Type E)
OM22 (Type C, D)
OM22 (Type B)
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LASER HEATING SYSTEMS
17 SERVICE MANUAL
Operation
After heater installation, but prior to the Laser Heater
start-up, inspect the system for operational readiness.
The following check list specifies those items that should
be inspected on a routine basis:
¢Check that the Laser Heater is plugged into correct
electrical outlet.
¢Verify that adequate supply of fuel is available in fuel
tank.
¢Confirm that fuel is free of water or other
contaminates.
¢Check fuel tank for good operating condition; it must
be free of rust, corrosion, and/or leaks.
¢Inspect fuel line for signs of leaks, loose connections,
cracks, air pockets or blockages.
¢Confirm that fuel valves on fuel tank and fusible link
valve are open so fuel can flow freely.
¢Outside dwelling, check area immediately around flue
pipe for combustibles or obstructions to free air
circulation.
¢Inspect intake air line for cracks, loose connections or
blockage.
¢Check exhaust air line for cracks, loose connections
or blockage.
¢At rear of heater, verify that the air flow to the air
circulation fan is not blocked.
¢Inspect dwelling interior and confirm that immediate
area near heater is free of combustibles and objects
that might interfere with free air flow.
¢Make sure that room sensor is not exposed to drafts,
direct sunlight, or direct heat from the Laser.
¢Use the heater only with in the range of temperatures
indicated in Fig. 3-2.
If this inspection reveals any system deficiencies,
correct the problems before operating the heater.
STEP1: Open the Valve(s)
Open the valve(s) for the external fuel tank and fusible
link valve of the heater.
STEP2: Start the Fuel Flow
Gently press the red reset button one time for a period
of one second in order to release the float of the fuel
sump.
NOTE: Resetting the fuel sump is necessary only if the
heater is being started for the first time, or after
heater has been out of fuel, or if it hasn’t been
used for an extended period of time. It may
also be required if fuel inlet pressure exceeds
2.5 psi. In this case a pressure reducing valve
must be installed.
STEP 3: Plug in the Heater
Plug heater into an electrical outlet.
Do not connect to an outlet shared with other
appliances.
NOTE: In areas of frequent power outages or lightening
strikes it is advised that a surge suppressor be
used.
STEP4: Set Clock
Press “HOUR” and “MIN” button to correct time.
NOTE: “HOUR” or “MIN” button will change the time
every one (1) unit. Holding the button
continuously will cause the time to change
rapidly. Clock indication is 24-hour military time
(ex. 19:10 = 7:10 PM)
NOTE: In the event of a power failure over 20 min., all
clock and timer settings are cancelled.
Section 3
3-4 PRE-OPERATION CHECK LIST
Operating RangeOperating Range
-20
Point A : Room temperature 0˚F
Outside Temperature -20˚F
Point B : Room temperature 60˚F
Outside Temperature -45˚F
Outside Temperature (˚F)
-25
-30
-35
-40
-45
0204060
B
A
Room Temperature (˚F)
Figure 3-2 OPERATING TEMPERATURE RANGE
3-5 BERORE OPERATION
IMPORTANT: Clock on the heater always must be
set to current time.
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