42
COMMISSIONING
TO FILL AND TURN ON THE WATER HEATER
The power supply to the water heater must not be switched on until the
water heater is filled with water
and a satisfactory megger reading is obtained.
•
Open all of the hot water taps in the house (don’t forget the shower).
•
Open the cold water isolation valve fully on the cold water line to the water
heater.
Air will be forced out of the taps.
•
Close each tap as water flows freely from it.
•
Check the pipe work for leaks.
•
Inspect for leaks at the temperature pressure relief valve connection to the
water heater.
If a leak is detected, close the cold water isolation valve fully and relieve
pressure from the water heater by either operating the easing lever on the
temperature pressure relief valve or opening a hot tap. Remove the valve and
all of its thread sealant from the threads of the valve. Reapply new thread
sealant and refit the valve. Refer to the procedure in
on page 37.
•
Operate the easing lever on the temperature pressure relief valve to check
the smooth operation of the valve plunger and that water discharges freely
from the drain line. It is very important the lever is raised and lowered gently.
The lever should move smoothly and without undue force.
If the lever cannot be moved or is jerky in its movement, then the valve has
been damaged and must be replaced.
•
Switch on the electrical supply at the water heater isolating switch on the
switchboard and at the isolating switch at the water heater (if installed).
Explain to the householder or a responsible officer the functions and operation
of the water heater. Upon completion of the installation and commissioning of the
water heater, leave this guide with the householder or a responsible officer.
TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater on completion of the installation,
such as on a building site or where the premises is vacant, then;
•
Switch off the electrical supply at the water heater isolating switch on the
switchboard and at the isolating switch at the water heater (if installed).
•
Close the cold water isolation valve at the inlet to the water heater.
