Power Supply - Viessmann BW 35 .AHT PW Series Installation And Service Instructions Manual

Installation sequence
Electrical connections
Sensors, external
Terminals Analogue inputs and outputs
551XD1 Room temperature sensor (plant room)
551XD3 Buffer temperature sensor, top
551XD5 Buffer temperature sensor, bottom
551XD7 Outside temperature sensor
807XD1 Return temperature sensor, residual heat
846XD1
Flow temperature sensor, DHW cylinder charging
sion)
846XD3 Temperature sensor, DHW cylinder, top
865XD1 Flow temperature sensor, coolant buffer cylinder charging
extension)
865XD3 Temperature sensor, coolant buffer cylinder, top
sion)
865XD5 Temperature sensor, coolant buffer cylinder, bottom
sion)

Power supply

Isolators for non-earthed conductors
The integral ON/OFF switch must simultaneously
■
isolate all non-earthed conductors from the mains
with a minimum contact separation of 3 mm.
Danger
Incorrectly executed electrical installations can
result in injuries from electrical current and dam-
age to the appliance.
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
Danger
The absence of system component earthing can
lead to serious injury from electric current if an
electrical fault occurs.
Re-establish all earth connections of the heat
■
pump.
■ Heat pump and pipework must be grounded
to the equipotential bonding of the building.
Danger
Incorrect core assignment can result in serious
injury and damage to the appliance.
Never interchange cores "L" and "N".
42
(cont.)
tQ
tW
6
qI
(control extension)
r-Z
eI (control exten-
(control extension)
eQ
(control
uW
(control exten-
iW
(control exten-
iW
■ Consult your power supply utility, which may offer dif-
ferent supply tariffs for the power circuits.
Observe the technical connection requirements of
the power supply utility.
■ The power-OFF assignment is made via the type of
connection.
In Germany, the power supply can be cut off for up to
3 x 2 hours per day (24 h).
The heat pump control unit/PCB must be supplied
■
with power without being interrupted by the power
supply utility. Tariffs subject to possible shutdown
must not be used here.
Install the power supply of the heat pump control unit
and the cable for the power-OFF signal in accord-
ance with the separate "Connection and wiring dia-
gram".
Protect the power cable to the heat pump control unit
■
with a fuse of max. 63 A.
Information on the compressor power supply
(power circuit)
!
Please note
■
Incorrect phase sequence can cause damage
to the appliance.
Make the compressor power supply only in
the phase sequence specified (see terminals)
with a clockwise rotating field.
The compressor power fuses must have C charac-
■
teristics.
Note
Pt1000
Pt1000
Pt1000
Pt1000
Pt1000
Pt1000
Pt1000
Pt1000
Pt1000
Pt1000