Connecting To Terminals X3.8/X3.9 - Viessmann VITOCAL 200-G Installation And Service Instructions Manual

Installation sequence
Power supply
Version 2
N 11 21
L1 L2 L3
L 1
A
L 1
L 3
L 1
L 3
B
L 3
22 24

Connecting to terminals X3.8/X3.9

After connecting the power supply, one
of the following components must be
connected at terminals X3.8 and X3.9:
■ primary circuit pressure switch and/or
frost stat
or
■ jumper supplied
60
(cont.)
L 2
L 2
L 2
12 14
LEDs explained
A Voltage "U":
Illuminates green if voltage is
applied.
B Relay "R":
Illuminates yellow if the phase
sequence is correct.
Does not illuminate if the phase
sequence is incorrect.