Toyotomi OM-180 User Manual
Instantaneous Oil-Fired Water Heater
Operation and Maintenance Instructions
MODEL OM-180
CONTENTS
IMPORTANT
READ AND UNDERSTAND INSTRUCTIONS BEFORE INSTALLING OR USING THIS WATER HEATER.
RETAIN INSTRUCTIONS FOR FUTURE REFERENCE. CHECK LOCAL CODES AND ORDINANCES FOR
PERMITTED USE.
CAUTION
THIS WATER HEATER SHALL NOT BE USED FOR COMMERCIAL USE OR FOR ANY PURPOSES OTHER
THAN HOT WATER SUPPLY USES. OTHER USAGE MAY CAUSE A MALFUNCTION OR SHORTEN ITS
SERVICE LIFE. DO NOT REMOVE THE RATING PLATE AND LABELS FROM THE WATER HEATER UNIT.
SECTION A:
Safety Tips
1
Safety Features
3
SECTION B:
Specifications
4
Dimensional Outline
5
Control Panel
6
Construction
6
SECTION C:
Fuel Guide
8
SECTION D:
Operation
Fueling
9
Inspection Before Operation
9
Operation
10
Adjusting Water Temperature
10
Flow Rate and Water Temperature
11
Turning Unit Off
11
Preventing Freeze Up
11
Long Term Inactivity
12
SECTION E:
Routine Maintenance
Inspection and Maintenance
13
Inspection and Maintenance Items
13
SECTION F:
Troubleshooting
14
Wiring Diagram ---------------------------------------------7
BE SURE TO FOLLOW THE FOLLOWING INSTRUCTIONS.
The instructions which are contained in this manual are classified into the following two types, which are
"WARNING" and "CAUTION". These instructions are intended to provide important information for safe
operation.
"WARNING" indicates the possibility of causing the user a fatal accident or serious injury if the water heater
is incorrectly operated.
"CAUTION" indicates the possibility of causing the user injuries or material damages if the water heater is
incorrectly operated.
WARNING
1. Never use any fuel other than ASTM D3699 1-K Kerosene, ASTM D396 No.1 or No.2 Fuel Oil.
NEVER USE GASOLINE. Use of such fuels can result in an explosion and/or fire and cause injury.
2. Never store flammable liquids or materials such as gasoline near the unit.
3. This unit should be installed by a licensed, authorized person(s) due to the necessity of making electrical, water and fuel connections.
4. RISK OF BACKFIRE AND INDOOR AIR POLLUTION. Before operation make sure flue pipe is free of snow,
icing, leaves, bird's nest or strong drafts.
5. RISK OF INDOOR AIR POLLUTION AND FIRE. Be sure the exhaust pipe is properly installed and connected. Aluminum tape may be used for sealing exhaust pipe connections.
6. RISK OF INJURY FROM MOVING PARTS AND ELECTRICAL SHOCK. Disconnect power cord before servicing unit.
7. This water heater is designed to be used no more than 4‚922 FT. (1‚500 m) above sea level. When the
water heater is installed the flue pipe at altitude of higher than 1,640FT. (500m) ~ 4.922 FT. (1.500 m)
above sea level or is installed the chimney at altitude of higher than 3,280FT. (1,000m) ~ 4‚922 FT.
(1,500m), adjustments are needed.
Ask your local dealer.
The water heater may have a failure of combustion at a high altitude.
CAUTION
1. HOTTER WATER INCREASES THE RISK OF SCALD INJURY. Water heaters are intended to produce hot
water. Water heated to a temperature which will satisfy clothes washing, dish washing, and other sanitizing needs can scald and permanently injure you upon contact. Before changing temperature setting
make sure nobody is using a shower. High temperature setting increases the risk of scald injury.
Temperature has been set at factory to about 130°F.
2. RISK OF SCALD INJURY. When using a shower, feel the temperature of the water with your hand before
getting under the water.
3. RISK OF SCALD INJURY. Do not touch hot water flowing from temperature and pressure relief valve.
4. RISK OF BURN INJURY. Do not touch flue pipe top and exhaust pipe. The insulated material provided
should be installed around the exhaust pipe. Due to high surface temperature, keep children away from
the unit.
1
SECTION A:
SAFETY TIPS
OTHER PRECAUTIONS
1. This unit is only for indoor use. Avoid its exposure to rain or moisture.
2. Do not use for drinking or cooking until the water supply has been approved by local authorities.
3. Hot water (or cold water) left in heat exchanger or piping must not used for cooking or drinking.
4. When using a large amount of hot water the temperature may change, even though the temperature
setting has not been changed. Special caution must be taken if two faucets are open at the same time.
5. If the unit appears to be operating abnormally or in an emergency, turn off the unit and call an authorized service person.
6. Avoid the use of hard water. In regions where hard water is the only source, take advantage of a water
softener.
7. Do not use a damaged unit. If repairs are needed, contact your dealer.
8. Keep the area around the unit, the fuel tank and the flue pipe clean and free of flammable materials.
9. If you plan to be away from your home for a long period of time, shut-off the fuel valve on the fuel tank.
Press "POWER SWITCH" to "OFF" position and disconnect the power supply cord.
10. If the unit is not used for a long period of time, the fuel tank may contain water cause by condensation.
Be sure to check all filters and strainers for this condition, clean or replace filter elements before using
the unit.
11. The use of the water heater with the temperature selector knob at "B", "HOT", or "COLD" may propagate
bacteria growth in the water. In order avoid this, turn the temperature selector knob to "VERY HOT" once
a week to heat the water heater and water to a high temperature for approximately one hour.
12. Before changing the temperature setting, make sure that the water heater is not being used by any of
your family at any place in the house. All family members should be aware of this "Caution."
13. Fusible Link Valve (#10005597)
¡It is most important that the valve, depending on its use, be fully opened or fully closed.
¡The top nut on the valve (below the turn handle) is sealed and should never be tightened or
removed.
¡When installing fuel lines to the valve, be sure to check for fuel leakage.
¡A LEAKING VALVE SHOULD ALWAYS BE REPLACED.
14. Since the fluidity of No.2 fuel oil becomes worse at the temperature of -6°C and below, do not use in the
environment that causes this condition.
Poor fluidity causes the ignition failure, going-out of flame and incomplete combustion.
2
SAFETY FEATURES
1. Ignition Safety Device (Flame Sensor)
The unit will automatically stop all operations if ignition fails or if the flame fails during combustion.
''WARNING'' lamp will light.
2. High Limit Thermistor
In order to prevent burns, the over heat protector automatically stops all operations if the water in the
heat exchanger reaches abnormally high temperatures due to temperature thermistor malfunction. The
''WARNING'' lamp will light.
3. Heat Exchanger Bii-Metal Switch
If the heat exchanger temperature becomes abnormally hot because of a malfunctioning thermostat, the
burner is automatically extinguished and the ''WARNING'' lamp will light.
4. Power Failure Recovery System
If power fails during water heater operation the unit will turn off. When power resumes the unit will
automatically reignite.
5. Fully Vented System
Flue pipe system provides outside air for combustion and vents all combustion products to the outdoos.
7. Fuel Strainer
Special strainer catches any dirt or impurities present in the fuel before it is sent to the burner.
If the heat exchanger temperature becomes abnormally hot because of a malfunctioning thermostat, the
burner is automatically extinguished and the ''WARNING'' lamp will light.
9. Air Pressure Switch
When the air flow volume reduces or the flue pipe is clogged, the burner is automatically extinguished
and the "WARNING" lamp will light up.
3
6. Fusible Link Valve
If a household fire should occur, causing the fuel line or water heater to become extremely hot, the
fusible link valve will stop the fuel supply to the burner. This will prevent the fuel supply from the external
tank from continuing to flow into the house.
8. Temperature Fuse
SPECIFICATIONS
Model: OM-180
Type: Combustion Type Pressure Vapor
Flue Pipe Forced Flue
Heating Supply System Instantaneous
Purpose Hot Water Supply, Heating
Ignition: High Voltage Discharge Spark
Fuel ASTM D3699 1-K Kerosene, ASTM D396 No.1 or No.2 Fuel Oil
Efficiency: 90%
(1)
Hot Water Input: 148‚000 BTU/h
Fuel Consumption: 1.05 gal/h
Capacity of Heat Exchanger: 5.10 gal
Fuel system: External tank
(2)
Dimensions (W x H x D): 12-5/8'' x 27-3/4'' x 22-1/2''
Weight: 81 lbs. Empty
Vent Pipe Hole: 4-3/4 diameter
Maximum Length of Vent Pipe System: 10 ft., 3 bents or less
Electrical Rating: 120 Volts AC, 60 Hz
Ignition - 120W
Burning - 98W
Required Accessories: Fuel filter, Temp & pressure relief valve
Safety Device: Ignition safety device,
High Limit Thermistor,
Heat exchanger bi-metal switch,
Temperature fuse, Fusible link valve
Exhaust Air Temperature: less than 500°F
Nozzle: Quantity of Vapor 0.85 GPH
Spraying Angle 60°
Spray Pattern Delavan Type XA
Temperature Fuse: 282°F
Electric Current Fuse: 5 A, 7 A
(1) Heat and vaporized water are produced by the combustion process of this water heater. This rating
does not take into account heat loss due to condensation of water vapor.
(2) External tank to be purchased from local suppliers.
4
SECTION B:
SPECIFICATIONS
DIMENSIONAL OUTLINE
6-1/4
（160ｍｍ）
Exhaust Outlet
φ2-3/4"(φ70mm)
（570ｍｍ）
8-1/2
（215ｍｍ）
22-1/2
A
ir Intake Inlet
φ2-3/4(φ70ｍｍ）
Access Cover
3/16"
(5mm)
12-5/8"
(320mm)
Hot Water Outlet or
T&P Relief Valve
(NPT 1-1/4"Male)
19-1/4"(488mm)
"
4
(101mm)
5
Fuel Line
Junction Box
Front Panel
Cold Water Inlet or
27-3/4"(705mm)
Drain Outlet
(NPT 1-1/4"Male)
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