AIT HSDV 12.1M3, Operating Manual

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Subject to technical amendments without prior notice | 83059300iUK | ait-deutschland GmbH
6.1 Heating circuit
Safety module and shut-off ball valves
1. Take the safety module and the shut-off ball
valves out of the accessory pack and fit them to
the connections provided. Use seals from the ac-
cessory pack.
2. Lay the safety discharge of the safety valve into
the drain via a funnel waste trap according to the
relevant standards and guidelines.
It is essential that the safety discharge is connect-
ed.
Heating water inlet and outlet
1. Establish the hydraulic connection to the unit.
2. Establish the hydraulic connection to the heating
circuit.

Position of the connections: “Dimensioned draw-
ings”, page 22
6.2 Expansion vessel
The expansion vessel for the heating circuit is integrated.
Always inspect whether the size of the expansion ves-
sel is large enough for the system. If necessary, an ad-
ditional expansion vessel must be installed on site in
accordance with the relevant valid standards.
NOTE
The admission pressure of the expansion
vessel must be adjusted to the system (ap-
prox. 0.5 bar less than the system filling pres -
sure) in accordance with calculation accord-
ing to the relevant standards (EN 12828).
6.3 Hydraulic connection for the
domestic hot water tank
Connect the domestic hot water tank according to DIN
1988 and DIN 4753 Part 1 (or the standards and direc-
tives applicable locally).

Position of the connections: “Dimensioned draw-
ings“, page 22
The working overpressure cited on the name plate
must not be exceeded. Install a pressure reducer if re-
quired.
The sensor for the domestic hot water preparation is
already connected in the switch box.
IMPORTANT
The electrical conductivity of the domestic hot water
must be > 100 µS/cm and must lie within the drink -
able water quality limits.