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TECHNICAL ASSISTANCE CENTRE
14 TEMPORARY SHUTDOWN
If you are going away for a short period of time like a
weekend or a short holiday, etc., and outdoor temperatures
are going to remain above ZERO, proceed as follows.
- Adjust the storage cylinder thermostat to its minimum
setting.
b
If outdoor temperature may drop below ZERO (risk
of freezing) perform the operations described in the
“Preparing for extended periods of disuse” section.
15 PREPARING FOR EXTENDED
PERIODS OF DISUSE
If the storage cylinder is not going to be used for an
extended period of time, perform the following operations:
- Cover the solar collectors with suitable protection
- Switch the electricity supply to the storage cylinder’s
valve group and to any associated boiler OFF at the
main switch and at the control panel
- Close the shut-off cocks for the domestic hot water
circuit.
b
Drain the domestic hot water circuit if there is any risk
of freezing.
Contact your local
B
Technical Assistance Centre
if you encounter any problems in completing the above
procedure.
16 MAINTENANCE
Scheduled maintenance is essential for the safety,
efficiency and long working life of your storage cylinder.
Proper maintenance also reduces energy consumption and
ensures reliability over time. Have your storage cylinder
serviced either by the manufacturer’s Technical Assistance
Centre or by a qualified heating engineer at least once a
year.
Perform the following operations before beginning any
maintenance:
- Switch the electricity supply to the storage cylinder’s
valve group and to any associated boiler OFF at the
main switch and at the control panel
- Close the shut-off cocks for the domestic hot water
circuit
- Drain the storage cylinder’s DHW (secondary) water
circuit.
REPLACING THE PUMP
Perform the following operations before starting work to
replace the pump (C):
- Switch the electricity supply to the storage cylinder’s
valve group and to any associated boiler OFF at the
main switch and at the control panel
- Close the flow regulator (V)
- Turn the valve knob 90° clockwise to close the valve
(R)
- Unscrew the ring nuts (H1 and H2) and remove the
pump (C).
Reverse the above steps to fit the new pump.
V
C
R
H1
H2
M
Return
group
Outlet
group
CHECKS TO PERFORM DURING SYSTEM
MAINTENANCE
- Use litmus paper to ensure that the pH of the heat
transfer liquid is not below 7.5
- Use an instrument like a refractometer or densimeter
to check that the heat transfer liquid has not lost its
anti-freeze properties
- Check the controller settings
- Check the position and functioning of the temperature
sensors
- Check the pre-charge in the expansion vessel (2.5
bar)
- Check the functioning of the storage cylinder and
protective anode.
