Viessmann VITOCROSSAL 200 CI2 Series Installation Instructions Manual page 22

Installation
Electrical Connections
Wiring panel
fÖ Power cable DIN rail
P1 Output 120V for:
DHW pump downstream of low loss header
If no DHW pump is installed: Heating circuit pump
for heating circuit without mixing valve A1 in
conjunction with low loss header and heating circuits
with mixing valve
P2 Output 120V for:
Heating circuit pump for heating circuit without
mixing valve A1 in conjunction with low loss header
and heating circuits with mixing valve or DHW
recirculation pump
lH External call for heat
! Outside temperature sensor, terminals 1 and 2
% Tank temperature sensor or temperature switch such
as an Aquastat, terminals 3 and 4
lA CAN BUS connection
jF PlusBus
F1 Fuse 6.3 A (slow), 120V
F2 Fuse 1 A (slow), 120V
22
(continued)
F2
Overview of connections to the wiring panel and MZIO
Note: For further information on the connections, see the
following chapters.
MZIO
ZP1 Zone 1, pump
ZP2 Zone 2, pump
ZP3 Zone 3, pump
66 Potential-free changeover contact
S
Normally closed (NC)
O
Normally open (NO)
P
COM
ZI1 Zone 1 or safety input 1
ZI2 Zone 2 or safety input 2
ZI3 Zone 3 or safety input 3
CAI Combustion air interlock
DIS Digital input (burner lockout)
TS1 Low loss header sensor
0-10V OUT Output 0-10V (burner modulation feedback)
0-10V IN Input 0-10V
When connecting accessories observe the
separate installation instructions provided
with them.
Vitocrossal 200 CI2 Installation