Viessmann VITOCAL 300-A Installation And Service Instructions Manual page 25

External heat pump type AW-O-M
C Electrical connecting cable (con-
trol cable) 230 V~, control unit/
heat pump (accessories)
Required cable length inside the
heat pump: min. 1.65 m
D Electrical connecting cable (LV)
< 42 V, control unit/heat pump
(accessories)
Required cable length inside the
heat pump: min. 1.50 m
E Hydraulic connection lines (con-
nection set, accessory)
F Power supply cable to the control
panel (on site)
Required cable length inside the
heat pump: min. 2.50 m
M Shut-off and drain valves
Preparing for installation
(cont.)
N Instantaneous heating water hea-
ter (accessory)
O Control module, instantaneous
heating water heater
P Power supply, instantaneous
heating water heater (see
page 95)
R Instantaneous heating water hea-
ter control
S Heat pump control unit
T Connection of further components
and functions
U Secondary flow temperature sen-
sor
V Heating water flow/heating water
return
25