Viessmann Vitocal 350-A Installation And Service Instructions Manual page 27

External heat pump type AWH-O
A Heat pump control unit
Wall outlet for cables: central,
directly below the heat pump control
unit
B Power cable for heat pump control
unit 230 V/50 Hz
Recommended cable: 3 x 1.5 mm
C Power cables for further compo-
nents and functions:
■ Pumps/pump control
■ Mixer
■ Sensors
■ Auxiliary functions (power-OFF,
external blocking, external
demand, external heat source
control, etc.)
■ Fault message
■ Two-way shut-off valve
■ Communication facilities
■ KM BUS
■ Remote control
D Two connecting cables, fully wired
(5, 15 or 30 m):
■ Control cable 230 V~
■ Low voltage cable < 42 V
E Instantaneous heating water heater
control
Recommended cable: 5 x 1.5 mm
F Power cable for instantaneous heat-
ing water heater
(400 V/50 Hz; 3/N/PE; max. output
9 kW)
Recommended cable: 5 x 2.5 mm
G Control module - instantaneous
heating water heater (install control
panel with one contactor in the
building)
(cont.)
H Connecting cable with plug for con-
trol module/instantaneous heating
water heater, approx. 1.6 m long
K Instantaneous heating water heater
(accessory; install in building)
L Flow temperature sensor - secon-
dary circuit (install in the heating
2
water flow inside the building; see
page 66)
Cable with plug, 2.0 m long (extend
on site if required)
M DHW cylinder flow / heating water
flow with secondary pump assembly
N Heating water return
O Shut-off and drain valves
P Hydraulic connection lines (connec-
tion set - accessory; underground
cable routing: see following dia-
gram)
R Power cable for compressor/fan
(400 V/50 Hz; 3/N/PE)
Recommended cable: 5 x 2.5 mm
(For underground cable routing, see
following diagram)
S Heat pump type AWH-O
T Control panel
Required cable lengths:
2
■ For the heat pump control unit from the
wall outlet:
0.7 m
■ In the heat pump (to the control panel)
from top edge of foundation:
2
2.5 m
Preparing for installation
2
27