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6. FILLING AND COMMISSIONING
6.1.
Check that the expansion vessel charge pressure is 0.15 or 0.3 MPa.
6.2.
Check that all water and electric connections are correctly configured.
6.3.
Open the main stopcock and fill the unit. Open successive hot taps starting with the tap
furthest from the heater. Leave each tap open for a few moments to allow all air and debris from
the system to exit. Close all of the taps.
6.4.
Turn off the mains water supply to the cylinder and drain the system through the drain cock.
6.5.
Refill the cylinder with hot taps open and close when water flows freely.
6.6.
Manually lift (by rotating the knob) both the expansion relief and the temperature and
pressure relief valves for a short period to remove trapped air from behind the valve seating and
to check the correct function of the discharge arrangement.
6.7.
Check all joints for leaks and rectify as necessary.
6.8.
With the heater full of water, switch on the electricity supply. Check that the cylinder heats the
water and the thermostat operates. Turn on the hot taps to check that warm water is delivered.
6.9.
Check that while the unit is heating up, no water exits from either the expansion relief valve
or the temperature and pressure relief valve. If water does exit through the valves check the
expansion vessel pressure and installation.
6.10.
Increase the temperature to maximum and allow the unit to heat and the temperature to
stabilise. Check that no water discharges from the valves. Turn on the hot taps to drain the heater
of hot water. Set the thermostat to the required temperature and allow the heater to reheat ready
for use.
7. SERvICING AND MAINTENANCE
7.1.
Servicing and maintenance must only be carried out by a competent unvented hot water
heater installer or by Rointe authorised personnel.
7.2.
Before any work whatsoever is carried out on the installation, it MUST first be isolated from
the mains electricity supply.
7.3.
Only use spare parts authorised by Rointe. The use of other parts will invalidate the warranty.
7.4.
Drain the cylinder – When draining the cylinder, always switch off the water heater. Turn off
the water supply at the stopcock (see Fig 2). Connect a hosepipe to the drain cock (see Fig 2) and
route it to a convenient gully. Open the drain cock and all hot taps that are served by the cylinder.
The cylinder may take several minutes to empty completely.
7.5.
In hard water areas it is necessary to replace the magnesium anode once a year.
7.6.
Remove the cartridge from the pressure reducing valve. Check the strainer and if necessary
remove any debris from in front of it. Replace the cartridge.
