Operating The Boiler; Cylinder Commissioning Checklist; User's Instructions; Maintenance 7 - Vaillant uniSTOR VIH GB SERIES Instructions For Installation And Use Manual

6 Commissioning

6.3 Operating the Boiler

•
Ensure the boiler mains switch is turned on.
•
Ensure that the programmer and thermostats are
calling for heat.
•
Check that the boiler fires and heats the cylinder
contents and the radiators according to the DHW and
room thermostat settings.
•
Carry out the commissioning and testing procedures
detailed in the installation instructions supplied with
the boiler.
•
Upon completion of the commissioning procedures,
set the DHW thermostat knob on the uniSTOR to
approx. 60 °C, and set the back up immersion heater
(fig. 9) thermostat to 60 °C.
6.3.1 Benchmark Cylinder Commissioning
Checklist
Complete the Benchmark Cylinder Commissioning
Checklist included in the instructions.

6.4 User's Instructions

Hand these instructions for use to the user for retention
and instruct in the safe operation of the boiler and
cylinder. Advise the user of the operation of the cylinder
thermostat and the immersion heater thermostat, and
that normally a setting of max, which gives a stored
water temperature of approximately 60 °C is adequate.
Note:
In hard water areas the DHW temperature
setting should not exceed this setting to avoid
possible scale build-up.
Advise the user of the precautions necessary to prevent
damage to the system and to the building if the system
does not remain operative during frost conditions.
Advise the user that the immersion heater is provided
as a back up means of water heating and is not intended
for use at the same time that the boiler is heating the
cylinder.
Finally, advise the user that for continued efficient and
safe operation, the boiler and uniSTOR cylinder should
be serviced at least once a year by a qualified servicing
company. It is important and strongly recommended
that arrangements are made for a maintenance
agreement with a qualified servicing company to ensure
regular servicing of the boiler and cylinder.
Please contact Group Service
(0870 - 6060777) for further details.
Note:
Leave installation, servicing and user
instructions with the user.
uniSTOR GB
7 Maintenance
The following maintenance work has to be carried out
annually by the competent installer or Vaillant Service
Solutions.
•
Inspection of pressure/temperature relief valve and
expansion relief valve.
Manually operate each valve by twisting the operating
cap, and check if water flows unobstructed via the
tundish to the discharge point. Ensure that both valves
re-seat satisfactorily.
•
Check pressure of expansion vessel.
Turn off mains water supply and open nearest hot
water tap to depressurise the secondary water system.
Check the expansion vessel charge with a pressure
gauge at the test point. If the pressure is below
3.0 bar, top up with suitable air pressure pump.
•
Complete service section of Cylinder Commissioning
Checklist.
Note:
In the event that parts require replacement, use
only genuine spare parts supplied by Vaillant
Ltd.

Maintenance 7

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