Omcan 46788, Инструкция по эксплуатации, Страница: 10 / 28

10
Installation
NOTE: To protect against untimely corrosion of hot and cold water fittings, it is strongly recommended
that the electric unions or couplings be Installed on this water heater when connected to copper pipe.
The water heater is equipped with 1/2 inch NPT water connections.
If using copper tubing, older tubing to an adapter before attaching the adapter to the cold water inlet
connection. Do not solder that cold water supply line directly to the cold water inlet, it will harm the dip tube and
damage the tank.
WATER PIPING PRESSURE TEST
This section is only for the manufacturer installing the water heater when the installation is to comply with
H.U.D. Standards. When testing the waterways, H.U.D. Standards state: “Water distribution system: All
water piping in the water distribution system shall be subjected to a pressure test. The test shall be made by
subjecting the system to air or water at 100 psi for 15 minutes without loss of pressure. When air pressure is
used, the water heater shall not be connected during the test.”
TEMPERATURE-PRESSURE RELIEF VALVE
This heater is provided with a properly certified combination temperature-pressure relief valve by the
manufacturer.
The valve is certified by a nationally recognized testing laboratory that maintains periodic inspection of
production of listed equipment of materials as meeting the requirements for Relief Valve for Hot Water Supply
Systems, ANSI Z21.22 • CSA4.4, and the code requirements of ASME.
If replaced, the valve must meet the requirements of local codes, but not less than a combination temperature
and pressure relief valve certified as indicated in the above paragraph.
The valve must be marked with a maximum set pressure not to exceed the marked hydrostatic working
pressure of the water heater (150psi=1035kPa) and a discharge capacity not less than the water heater input
rate as shown in the model rating plate.
For safe operation of the water heater, the relief valve must not be removed from its designated opening nor
plugged.
The temperature-pressure relief valve must be installed directly into the fitting of the water heater designed for
the relief valve. Provide tubing so that any discharge will exit only within 6 inches (153mm) above an adequate
drain, or external to the building or structure. Be certain that no contact is made with any live electrical part.
The discharge opening must not be blocked or reduced in size under any circumstances. Excessive length,
over 30 feet (9.14m), or use of more than four elbows can cause restriction and reduce the discharge capacity
of the valve.
No valve or other obstruction is to be placed between the relief valve and the tank. Do not connect tubing
directly to discharge drain unless a 6 inch air gap is provided. The relief valve must be allowed to discharge