Sachs COPPERFLOW Owner's Manual - Vent Pipe
6
PRESSURE RELIEF & NON-RETURN VALVE
Situated near the top of the water heater, the pressure relief valve is combined
with a non-return valve and is set at 1400kPa. During periods after hot water has
been drawn off, water in the coil is trapped between the tap and the non-return
valve. This water heats up through the transfer of heat from water in the tank and
expands. The relief valve redirects this excess into the tank, assisting with topping
non-restricted to provide different flow rates.
The pressure relief valve should be checked for performance or replaced at
intervals not exceeding 5 years, or more often in areas where water contains
hard water deposits (See ‘Topping Up’, Page 7)
VENT PIPE
The vent pipe must not become blocked or obstructed. It should be checked
regularly to ensure it is not blocked.
SAFETY
This water heater is protected by a thermostat and a pressure relief valve.
Hot water increases the risk of injury by scalding.
The water heater is thermostat should be set at the lowest possible temperature
which will provide sufficient hot water. The thermostat can be adjusted within the
range shown below –
Minimum Thermostat Setting of 60ºC
Maximum Allowable Thermostat Setting of 80ºC
We recommend, and it may also be required by some Councils, that an approved
temperature limiting device be fitted into the hot water piping to bathrooms. This
will keep the water temperature below 50ºC at the bathrooms. Risk of scald injury
will be reduced, whilst providing hotter water to the kitchen and laundry.