Connecting The Circulation Pump To P2; Floating Switching Contact Connection; Checking The Can Bus Terminator Switch Setting - Viessmann VITODENS 222-F Installation And Service Instructions Manual

Electrical connections

Connecting the circulation pump to P2

M
A
1~
B
Fig. 13
Circulation pump
A
Plug P2 on HMU heat management unit
B
Possible functions:
Heating circuit pump for heating circuit without mixer
■
A1 in connection with low loss header and heating
circuits with mixer
■ DHW circulation pump
Connect DHW circulation pumps with standalone
functions directly to the 230 V

Floating switching contact connection

Connection at plug
lH
One of the following functions can be connected:
■ External demand
■ External blocking
DHW circulation pump external demand (pushbutton
■
function, pump runs for 5 min). Cannot be connected
with Vitodens 222-W.
■ Room temperature controller (room thermostat)
For room temperature-dependent operating mode
A
1 L N
?
lH
Fig. 14
Floating contact
A

Checking the CAN bus terminator switch setting

The CAN bus resistor is switched using switch
the wiring chamber.
(cont.)
∼
supply.
in
A
Information on priority of connection options:
If heating circuit pump for heating circuit without
■
mixer A1 is installed:
Connect heating circuit pump to output P2.
Then connect DHW circulation pump to an EM-P1
extension (accessories).
If no heating circuit pump for heating circuit without
■
mixer A1 is connected:
Connect DHW circulation pump to output P2.
The function is selected in the commissioning assistant
by selecting the connected component.
Specification
Rated current
Rated voltage
Assigning functions in the commissioning assis-
tant
See commissioning assistant in "Commissioning".
Installation sequence
1 A
230 V ~
19