Plumbing - Toyotomi Oil Miser OM-148 Installation Manual

BE SURE TO FOLLOW THE FOLLOWING PROCEDURE
POWER SOURCE: 120V AC, 60Hz single phase
1. Disconnect power supply cord from power source.
2. Remove four (4) screws and junction box cover on the left
side of unit.
3. Disconnect ground wire (green) from the power supply cord
bracket.
4. Disconnect two power supply wires from upper side of the
terminal.
5. Squeeze strain relief with the adjustable pliers to remove plas-
tic bushing from the unit. Remove the power supply cord.
6. Replace the strain relief bushing to the power supply cable
and insert the cable into the hole of the left side of unit.
Connect the ground wire to the power supply cord bracket
and power wires to the terminal.
7. Affix the junction box cover to the unit and insert screws.
COLD AND HOT WATER 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-148.
CAUTION: An ANSI listed temperature and pressure relief valve should be installed at the hot water outlet
connection of the heater at the time of installation. Local codes should govern the installation
of the relief devices.
If a check valve or one-way valve is required on the cold water supply line, it is recommended
that an expansion tank (100 psi, 8 gal Min.) should be installed on the hot water supply line.
When the unit is to be installed as a replacement water heater, it is important to determine
whether a check valve has been installed or not.
Remove the check valve before installation of the unit unless a check valve is required by local
code.
In order to prevent the water heater from being damaged or developing a leak, regardless of
being used in a cold, warm or hot region, the cold water supply piping, hot water supply pip-
ing, drain pipe, check valve, valves, expansion tank, and temperature and pressure relief valve
should be protected with sufficient insulation materials (by wrapping with heat insulation or by
equipping with a freeze prevention heater).
1. A water softener is recommended in regions where hard water may be a concern.
2. Do not apply any heat to the unit nipples.
3. Use standard copper alloy unions and nipples for the connections to the unit.
4. Copper piping is recommended for the hot water supply line.
Note: Refer to local codes when considering piping materials. Steel piping is not recommended as it
may cause rust in the piping. Use NPT for piping of hot and cold water.
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PLUMBING

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