Making The Hydraulic Connections - Viessmann VITOCAL 200-G Installation And Service Instructions For Contractors

Installation sequence

Making the hydraulic connections

For arrangement of hydraulic connec-
tions, see page 7.
Connecting the primary circuit
!
Please note
The components used must be
resistant to the heat transfer
medium.
Never use zinc-plated/galvan-
ised pipes.
1. Equip the primary circuit with an
expansion vessel and safety valve (to
DIN 4757).
Note
■ The expansion vessel must be
approved to DIN 4807. The dia-
phragms of expansion vessel and
safety valve must be suitable for
the heat transfer medium.
■ The discharge and drain pipes
should terminate in a container.
This container must be able to hold
the maximum possible expansion
volume of the heat transfer
medium.
2. Ensure adequate thermal and anti-
vibration insulation of all pipes routed
through walls.
14
3. Connect primary pipes to heat
pump.
!
Please note
Avoid appliance damage.
Connect on-site primary lines
to the heat pump so they are
free of load and torque
stresses.
!
Please note
Make tight hydraulic connec-
tions on the primary side.
With hose outlets, ensure the
diaphragm grommets are
seated correctly. Seal hose
outlets with sealing tape if
necessary.
4. Insulate pipes inside the building to
provide protection from heat and
vapour diffusion.
5. Charge the primary circuit with
Viessmann heat transfer medium
and vent.
Note
Ensure frost protection down to
–19 °C.
Viessmann heat transfer medium is a
ready-mixed ethylene glycol-based
medium. It contains inhibitors for cor-
rosion protection. The heat transfer
medium can be used at temperatures
down to –19 °C.