36
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 wate
r 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
“Temperature Pressure Relief Valve”
on page 32.
•
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).
•
Check the status of the LEDs on the front of the Controller Module on the lower front of the water heater.
When the power is turned on, the green LED will commence to flash to indicate the water heater is heating.
If an Energy Management Unit has not been installed, the red LED will commence to slow blink flash.
Note:
Refer to
on page 12 for further information on the LED operation.
The temperature limiting valve on an E5X series water heater is factory set to provide 50°C hot water at the
outlet. If it is necessary to adjust the outlet temperature of an E5X series water heater, refer to
Temperature Compensation Adjustment
on page 37.
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.
