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7.Appendix
7.2 The method of grounding
7.Appendix
7.1 CAUTION
1. To reduce the risk of excessive pressures and temperatures in this water heater, install
temperature and pressure protective equipment required by local codes and no less than a
combination temperature and pressure relief valve certified by a nationally recognized testing
laboratory that maintains periodic inspection of production of listed equipment or materials, as
meeting the requirements for Relief Valves and Automatic Gas Shutoff Devices for Hot Water
Supply Systems, ANSIZ21.22. This valve must be marked with a maximum set pressure not to
exceed the marked maximum working pressure of the water heater. Install the valve into an
opening provided and marked for this purpose in the water heater, and orient it or provide
tubing so that any discharge from the valve exits only within 6 inches above, or at any distance
below, the structural floor, and does not contact any live electrical part. The discharge
opening must not be blocked or reduced in size under any circumstances.
3. Children should be supervised to ensure that they do not play with the appliance.
4. The appliance is fitted with means ford is connection from the supply mains having a
contact separation in all poles that provide full disconnection under over voltage category lll
conditions, and these means must be incorporated in the fixed wiring in accordance with the
wiring rules.
2. Hydrogen gas is produced in a hot water system served by this heater that has not been
used for a long period of time (2 weeks or more). Hydrogen gas is extremely flammable. To
reduce the risk of injury under these conditions, it is recommended that the hot water faucet be
opened for several minutes at the kitchen sink before using any electrical appliance connected
to the hot water system. When hydrogen is present, there will probably be an unusual sound
such as air escaping through the pipe as the water begins to flow. There should be no smoking
or open flame near the faucet at the time it is open.
27
7.3
of the Pressure release valve
Use
Pressure release valve is used to pressure going too high inside the tank. When the pressure
reaches the set value, the valve will open automatically so as to decrease the pressure .
The handle of the safety valve should be pulled once every six months so as to remove the calcium
carbonate deposition decrease the temperature. Take care as the temperature of the discharging water
is very high.
Vent pipes should be thermally insulated to prevent the pipes freezing in the winter.
Remark:
Pressure release valve: Model: YA-20, action pressure:0.7MPa
WARNING
Fail to operatethe relief valveeasing gear atleast once everysix months mayresult in the
water heater exploding.Continuous leakage ofwaterfrom thevalve may indicates problem
with the waterheater.
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