32
31
7.Appendix
7.2 The method of grounding
7.3
U
se of the
P&T valve
P&T valve is used to prevent the temperature or pressure going too high inside the tank. When the
temperature or pressure reaches the set value, the valve will open automatically so as to
release
the pressure or decrease the temperature.
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:
P&T valve: Model: PTR20, action
tempreture: 99
℃
, action pressure:0.85MPa
WARNING
Fail to operate
the relief valve
easing gear at
least once every
six months may
result in
the
water heater exploding.
Continuous leakage of
water
from the
valve may indicates
problem with the water
heater.
7.Appendix
7.4. Drain out the water in the storage tank
Cut out the water supply connection between the tap water supply and the tank by closing the
corresponding valve. Open the hot water outlet and then open the drain outlet valve at the same
time.
The water in the tank will be drained out through the drain outlet.
loosen the screws and open the cover
Press the red button to reset
7.5
Use of the overheating protector
DANGER:
The operation of the thermal cut-out indicates a possibly dangerous situation.
Do not reset the thermal cut-out until the water heater has been serviced by a qualified
person.
The overheating protector is used to turn the power off, preventing the water from being heated
too high. To return the unit to its normal operational status it will have to be re set manually.
Operation details
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