Viessmann Vitocal 100-A Series, Assembly And Servicing Instructions

Page: 7 / 23

ACT
Technical water inertial storage tanks
6
6020938-02
IMPORTANT
ONLY OPTIONAL ACCESSORIES CAN BE REQUESTED AFTER ORDERING THE UNIT,
WHILE FACTORY-FITTED ACCESSORIES CANNOT BE REQUESTED AFTER ORDERING THE UNIT.
Three optional kits are available according to specific needs. All kits, if not factory-fitted, can be provided
separately and should be mounted by the installer. All the characteristics and any necessary procedures for
correct installation are provided in the following paragraphs.
6.1
FACTORY-FITTED OPTIONAL ACCESSORIES
6.1.1 EXPANSION VESSEL KIT
The expansion vessel is placed in the structure of the water tank and the kit includes: 18l expansion vessel,
support, and connection pipe.
When installing the expansion vessel kit, the provided filling/drain valve is connected in its proper housing in
the connecting pipe between the water tank and the expansion vessel.
CAUTION: The pressure of the expansion vessel of the Vitocal 100-A unit coupled with the
storage tank should be reduced to 1.5bar.
The expansion vessel kit is placed in the ACT structure
with:
• Supporting plate
• A pipe which connects ACT with the expansion
vessel coupling
• The filling/drain valve in its new position
Before start-up ensure you have reduced the pressure of
the expansion vessel of the Vitocal 100-A unit to 1.5bar.
6.1.2 ELECTRIC HEATER KIT
The storage tank can be integrated with an electric kit consisting of an electric heater, a probe thermowell
and 2 electric panels containing: terminals, thermostats and a sensing bulb to insert into the thermowell of
the probe. All components should be fixed with a proper support that enables you to place the kit correctly
in the structure of the water tank. Two cable glands to connect the kit to the Vitocal 100-A unit are also set
up on the outer sheet plates.
ELECTRICAL CONNECTIONS
Check that the power supply matches the unit’s electric nominal data (voltage, phases, frequency). The
electric power connections must be made in accordance to the wiring diagram enclosed with the unit and in
conformity with national and international standards (providing general circuit breaker, residual current
devices for each line, proper earthing of the plant, etc.). Power cables, electric protections and line fuses
must be sized according to the specifications listed in the wiring diagram enclosed with the unit and in the
electrical data contained in the table of technical characteristics
The connections must be respected as shown in the wiring diagram:
• Signal wire AEH coming out from cable gland 1, must be connected to terminal X-6.1 located inside
the Vitocal 100-A unit.
• The power cable exiting the cable gland 2 must be connected to the mains power supply (230Vac -
50Hz - 1Ph + N + PE). It is necessary to install a suitable protective device and power disconnector,
with delayed characteristic curve, with at least 3 mm contact opening and adequate breaking
capacity and residual current protection.
The filling/drain
valve in its new
position