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4.0 COMMISSIONING
4.1 Do not switch on the electrical supply until the unit has been filled with
water and checked for leaks.
4.2 Check that all installation, electrical and discharge pipe requirements
have been met.
4.3 Check that all water and electrical connections are tight.
4.4 Open a hot water tap, turn on mains water supply to the heater.
4.5 Allow unit to fill and leave hot tap running for a short while to purge any
air and flush out the pipework. Close the hot tap and check the system
for leaks.
4.6 Manually test the operation of the Pressure (Expansion) Relief Valve
and, if fitted, the Temperature/Pressure Relief Valve. Ensure water flows
freely from the valve(s) and through the discharge pipes.
4.7 Switch on the electrical supply. The indicator light will illuminate during
heating. When the set temperature is reached the indicator light will go
out.
5.0 EXPLANATION TO USER
Following Installation and Commissioning of the water heater the operation
should be fully explained to the user:
5.1 HOT WATER
5.1.1 Indicate the location of the water heater and identify the outlets to
which it is connected.
5.1.2 Explain that the indicator light will be illuminated when the unit is
heating.
5.2 SETTING THE TEMPERATURE
5.2.1 The temperature can be set between the minimum setting (10°C) and
the maximum setting (70°C) by rotating the dial on the thermostat.
5.2.2 It is recommended that the temperature is set above 60°C.
5.3 DISCHARGE
5.3.1 Explain that water may drip from the discharge pipe of the pressure
relief valves/s and that this pipe must be left open to atmosphere.
5.3.2 Explain that if water flows from any safety valve fitted, the electrical
supply to the water heater should be switched off immediately. The
electrical supply should not be switched on again until the water heater
has been checked and approved by a qualified installer.
