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7.5.2
Service valve
When it is required to top up the circuit or to adjust the glycol level, one may use the service valve which is
accessible through the removable panel on the side opposite the water connections. Unscrew and remove
the cap from the service valve and connect a 14 mm (inside diameter) pipe, connected to the water mains,
to the hose connector and then drain the circuit by unscrewing the specific ring nut. After the end of the
operation, retighten the ring nut and screw the cap back on. In any case it is recommended to use an
external valve to fill the system, which can be set up by the installer.
7.5.3
Discharge of the plant
When the unit needs to be completely discharged, use the provided service valve.
It is advisable to install a suitable discharge pipe in order to preserve the surrounding area and to drain the
technical fluid following standards in force in the place of installation.
7.5.4
Condensate drainage of Vitocal 100-A unit
There is a clamp support on the side panel of the ACT unit, to fix the condensate drain pipe of the Vitocal
100-A unit, whose spouts are placed under said unit. The pipe can be accompanied on the side of the unit
and blocked by means of the supplied clamp so as to maintain the compactness of the system.
7.5.5
Removal of the panels for inspection and maintenance
The procedure for removing the panels so as to access the heater kit and expansion vessel kit is illustrated
below.
1) Remove the 6 screws indicated
2) Pull the panel forward
3) In this way you can access the
components
Ring nut
Cap with gasket
