thermital THE/COMBI3 1000, Installation And Maintenance Manual

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20
ENGLISH
INSTALLATION
b
The domestic hot water tank must be filled and
pressurised before the inertial storage cylinder
is filled.
b
In very hard water areas, use suitably treated water
to fill the inertial storage cylinder.
b
Make sure that the combination storage cylinder
is full of water before starting up the solar heating
system.
b
If the combination storage cylinder is installed in
systems that operate at pressures in excess of 4
bar, fit a pressure reducer.
b
A non-return valve must be fitted at the top of the
inertial storage cylinder to prevent natural circula-
tion developing.
b
Take care when opening the solar heating circuit’s
vent valves. Risk of burns!
b
Make sure that the solar circuit’s expansion vessel
is able to withstand high temperatures and that its
membrane is resistant to the water-glycol mix.
b
The domestic hot water system MUST INCLUDE
an expansion vessel, safety valve, automatic vent
valve and combination storage cylinder drain cock.
b
The safety valve must be connected to a suitable
collection and drain system. The manufacturer
declines all responsibility for damage caused by
water escaping from the safety valve.
b
Use a thermostatic mixer valve to limit the domestic
hot water outlet temperature.
b
If the pressure in the solar heating circuit drops, do
NOT top up with water but use the proper water-
glycol mix. Risk of freezing!
b
All piping, collectors, heat exchangers and other
devices in the circuit must be subjected to proper
hydraulic seal testing.
b
The choice of system components and the meth-
od of their installation are left up to the installer.
Installers must use their expertise to ensure proper
installation and functioning in compliance with all
applicable legislation.
b
The lower the temperature of the heating return
(<40°C), the greater the efficiency of the solar
heating system.
b
Make sure that all components chosen for use with
the system are able to withstand the thermal load
involved. In the summer months, when the solar
heating system is not used for the central heating,
steam can form inside the collectors, and tempera-
tures can exceed 120°C even near the combina-
tion storage cylinder.
b
The size of the combination storage cylinder must
be chosen to suit the solar heating system. It
must be big enough to store excess heat after the
domestic hot water tank has been heated without
being too big.
b
Insulate the pipes from the inertial storage cylinder
to avoid heat loss.