Electric Booster Heater (On-Site); Power Supply - Viessmann KWT Vitocal 300-G Pro Installation And Service Instructions Manual

Installation sequence
Overview of electrical connections
Swimming pool heating
Note
■ Swimming pool heating is activated via external
extension H1 with KM BUS.
Connections to external extension H1 only in
■
accordance with the separate "connection and wiring
diagram" sheet 180, sheet 181, sheet 182.
■ Connect only the circulation pump for swimming
pool heating to plug
gÖ
filter circuit pump must be connected separately.
If the components for swimming pool water heating
■
are connected to external extension H1, no other
external function (e.g. changeover of operating
mode) can be connected.
Cascade control via LON
The following communication modules (accessories)
must be fitted in the heat pump control units:
■ LON communication module for the cascade in the
lead appliance
■ LON communication module in lag heat pumps

Electric booster heater (on-site)

Only on-site appliances can be used (e.g. instantane-
ous heating water heater, immersion heater in heating
water buffer cylinder).

Power supply

Isolators for non-earthed conductors
■ The mains isolator simultaneously isolates all non-
earthed conductors from the mains with a minimum
contact separation of 3 mm.
■ We additionally recommend installing an AC/DC-
sensitive RCD (RCD class B
currents that can occur with energy efficient equip-
ment.
48
(cont.)
of external extension H1. A
) for DC (fault)
Connections for LON only in accordance with the sep-
arate "connection and wiring diagram" sheet 212.
■ Connection:
Appliance installation instructions
–
Electrical connection, see separate "connection
–
and wiring diagram" sheet 110.
■ Installation inside the Vitocal 300-G Pro/
Vitocal 300-W Pro is not possible.
Danger
Incorrectly executed electrical installations can
result in injuries from electrical current and in
appliance damage.
Connect the power supply and implement all
safety measures (e.g. RCD circuit) in accord-
ance with the following regulations:
■ IEC 60364-4-41
■ VDE regulations
■ Technical connection requirements specified
by the local power supply utility
Protect the power supply to the heat pump
■
control unit with an MCB/ fuse of max. 16 A.