Viessmann VITOCAL 222-S Installation And Service Instructions Manual page 50

Installation sequence
Electrical connection
A Expansion PCB on main PCB (con-
nect nothing on site)
B Main PCB (see page 50)
F3 Fuse 6.3 A (slow)
C Controller and sensor PCB (see
page 55)
D AVI PCB (see page 58)
F101 Fuse 1.0 A (slow)
E Luster terminals (see page 53)
F1 Fuse 6.3 A (slow)
X1 Terminals for earth conductor of
all associated system compo-
nents
X2 Terminals for neutral conductor
of all associated system com-
ponents
Internal unit: Main PCB (230 V~ function components)
Information regarding the connection
values
■ The specified output is the recommen-
ded connected load.
■ The total output of all components con-
nected directly to the heat pump con-
trol unit must not exceed 1000 W (e.g.
pumps, valves, message facilities,
contactors).
If the total output is < 1000 W, the indi-
vidual rating of a component (e.g.
pump, valve, message facility, contac-
tor) can be greater than specified.
However, the breaking capacity of the
corresponding relay must not be
exceeded.
■ The specified current indicates the
max. switching current of the switching
contact (observe the total current of
5 A).
50
(cont.)
F Switching module and power supply
Set the required parameters during com-
missioning; see from page 84.
for instantaneous heating water
heater (see page 64)