Table of Contents
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Instantaneous Oil-Fired Water Heater
IMPORTANT
THIS APPLIANCE SHOULD BE INSTALLED BY A LICENSED, AUTHORIZED PERSON(S) DUE TO THE
NECESSITY OF MAKING ELECTRICAL, WATER AND FUEL CONNECTIONS. RETAIN THIS MANUAL 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.
Safety Tips for Installation ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 1
Unpacking ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 2
Standard Installation Parts ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 2
Accessory Parts (Option)⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 2
Dimensional Outline⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 3
Selecting a Location ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 4
Tools Needed for Installation ⋯⋯⋯⋯⋯⋯⋯ 4
Fuel Tank Installation ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 5
Removing Air Trap ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 6
Temperature and Pressure Relief
Installation Manual
OM-128HH
MODEL
CONTENTS
Valve Installation ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 6
Plumbing ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 7
Permanent Wiring Installation ⋯⋯⋯⋯⋯⋯⋯ 9
Installation of Unit and Flue Pipe ⋯⋯⋯⋯⋯ 12
Preparation ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 15
Operation ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 15
Chimney Installation ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯ 16
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Summary of Contents for Toyotomi OM-128HH
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Page 1: Table Of Contents
Instantaneous Oil-Fired Water Heater Installation Manual OM-128HH MODEL IMPORTANT THIS APPLIANCE SHOULD BE INSTALLED BY A LICENSED, AUTHORIZED PERSON(S) DUE TO THE NECESSITY OF MAKING ELECTRICAL, WATER AND FUEL CONNECTIONS. RETAIN THIS MANUAL FOR FUTURE REFERENCE. CHECK LOCAL CODES AND ORDINANCES FOR PERMITTED USE. -
Page 2: Section A
SECTION A: SAFETY TIPS FOR INSTALLATION 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. -
Page 3: Section B
SECTION B: UNPACKING UNPACKING Unpack the unit carefully. Check to see if there are any loose screws that may have occurred in transit. Take accessories and the instruction manual out of the carton. Coupler for circulation pump Lead wire for Coupler for timer Lead wire for (2pcs.) -
Page 4: Dimensional Outline
DIMENSIONAL OUTLINE 3/16” (5mm) 12-5/8” (320mm) Exhaust Outlet ø2-3/4”(ø70mm) Air Intake Inlet ø2-3/4”(ø70mm) Temperature and Pressure Relief Valve Installation Opening Access Cover (NPT 3/4”) Female Hot Water Outlet (NPT 1-1/4”Male) Front Panel Cold Water Inlet (NPT 1-1/4” Male) Drain Outlet (NPT 1/2”... -
Page 5: Section C
SECTION C: INSTALLATION WARNING: This unit must be installed in accordance with these instructions, local codes, ordinances and/or in the absence of local codes, the latest edition of the national fire protection association (NFPA31) code. Check and comply with all state, local codes and ANSI (AMERICAN NATIONAL STANDARD INSTITUTE) Z21.22 that may apply to water heater(s) before beginning the installation. -
Page 6: Fuel Tank Installation
FUEL TANK INSTALLATION The fuel tank must be purchased separately and installed by a qualified fuel supply technician. NOTE: Fuel tank installation must comply with National Fire Protection Association Code NFPA 31 or local- ly applicable codes. Check with local building officials. The following instructions should be followed for installation of a large capacity, gravity-fed fuel tank. -
Page 7: Removing Air Trap
REMOVING AIR TRAP When operating for the first time or when refueling an empty tank, air may be trapped in the fuel line, mak- ing ignition difficult. In this situation, after removing the trapped air thoroughly from the fuel filter at the fuel tank outlet, follow the procedures below: Press "POWER SWITCH"... -
Page 8: Plumbing
WARNING: Plumbing should conform to proper plumbing methods, and in conformance with local codes or regulations. A licensed plumber familiar with local codes and ordinances should install the OM-128HH. CAUTION: An ANSI (AMERICAN NATIONAL STANDARD INSTITUTE) listed temperature and pressure relief valve should be installed at the hot water outlet connection of the heater at the time of installation. - Page 9 Selecting an Expansion Tank Select an expansion tank by referring to the following calculation formula and the calculation formulas pro- vided by the manufacturers of tanks sold commercially. Expansion Tank Calculation Formula +14.5 + 1.1 V Tank Capacity of Expansion Tank (gal) Total volume of heating piping system (gal) Expansion coefficient of water Expansion tank’s gas charge pressure (PSI)
- Page 10 Plumbing Example (For Heating) Air release valve Air release valve Circulation pump Temperature and pressure relief valve Header valve Expansion tank Hot water Outlet Drain valve Bypass Differential Union Pressure valve Air release valve Drain pipe Valve Hot water Inlet Header valve Header Air separator...
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Page 11: Permanent Wiring Installation
PERMANENT WIRING INSTALLATION WARNING: TO AVOID ANY RISK OF FIRE AND ELECTRIC SHOCK. Make sure the main circuit breaker and power supply cord is disconnected before servicing. Electric shock may cause serious injury. It is recommended that installation should be conducted by a Licensed Electrician. PROCEDURE FOR PERMANENT WIRING POWER SOURCE: 120V AC, 60Hz single phase Turn off the main circuit breaker. -
Page 12: Differential Switch And Dip Switch
DIFFERENTIAL SWITCH AND DIP SWITCH NOTE: Make sure that the power supply cord is disconnected when changing the position of DIP Switch is selected. The differential switch on the main circuit board controls does not change the heat exchanger water temper- ature. -
Page 13: Wiring For Timer ⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯⋯11
WIRING FOR A TIMER (AVAILABLE FROM AN ELECTRICAL SUPPLY COMPANY) This water heater is equipped with the connection terminal for the timer. This terminal has no-voltage (also known as dry contacts) contact. You can operate the unit with the timer by connecting the timer (option) to the terminal for timer connection “L”... -
Page 14: Installation Of Unit And Flue Pipe
INSTALLATION OF THE UNIT AND FLUE PIPE SAFETY TIPS WARNING: The flue pipe opening must be fully exposed to outside air. Do not vent into a garage, basement, under the floor, or into any enclosed area. Do not install the flue pipe in close proximity to other objects or materials. 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. - Page 15 INSTALLATION OF FLUE PIPE IMPORTANT: Check and comply with all state and local codes that may apply to water heater before begin- ning installation. Select unit location. Allow clearances as indicated above between the unit and all other materials Make sure that the outside area to where the flue pipe will reach is clear of any objects. NOTE: Make sure wall thickness is not greater than 10-1/2 inches.
- Page 16 Slide the insulating cloth cover over the flexible exhaust pipe and the flexible bent joint. Insulating cloth cover NOTE: When disconnecting the extension pipe (such as flexible pipe and flexible bent joint), turn clockwise and pull apart. Remove the screw from the exhaust opening of the unit. Insert the flexible exhaust pipe to the exhaust opening and secure them with the screw.
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Page 17: Section D
10-1/2 in. (270 mm) maximum Inner flue pipe Hose band Rubber joint Flange gasket 4~10-1/2 in. (100~270 mm) Insulating cloth cover Outer flue pipe Flexible bent joint Tight band Inner sleeve flange Inlet hose Rubber joint Aluminum tape Flexible exhaust pipe Hose band Exhaust pipe ring SECTION D:... -
Page 18: Section E
SECTION E: CHIMNEY INSTALLATION This unit is a sealed combustion system and as an installation option it may be connected directly to a chimney. Using this option, room air is used for combustion and the exhaust gases are vented into the chimney to the outside. IMPORTANT: This appliance should be installed by a licensed, authorized person(s) due to necessity of making electrical, water and fuel connections. - Page 19 Intake Pipe Top Exhaust Pipe Adapter Outside Air Intake Opening (more than155 in OM-128HH Fig. 1 INSTALLATION OF EXHAUST PIPE ADAPTER Exhaust Outlet Remove the screw from the exhaust outlet of the unit. Insert the exhaust pipe adapter to the exhaust outlet and secure with the screw.
- Page 20 TOYOTOMI U.S.A., INC. 604 Federal Road, Brookfield, CT 06804 www.toyotomiusa.com This manual supersedes earlier editions. PART No.20476994 Printed in Japan New 03/14 7638003052...