Operating instructions

126
Message and safety connections
Terminals Function Explanation
X3.1 Phase switched
X3.3
X3.4
Flow switch, well circuit Zero volt contact required:
■ Closed: Heat pump operational
■ Open: Heat pump shut down
■ Breaking capacity 230 V, 0.15 A
Connection on site; remove jumper when
connecting
X3.6
X3.7
Power-OFF Zero volt contact required:
■ Closed: No blocking (safety chain has
continuity)
■ Open: Blocking enabled
■ Breaking capacity 230 V, 0.15 A
Connection on site; remove jumper when
connecting
X3.8
X3.9
Primary circuit pressure
switch and/or frost stat
or
Jumper
Zero volt contact required:
■ Closed: Safety chain has continuity
■ Open: Safety chain interrupted; heat
pump shut down
■ Breaking capacity 230 V~, 0.15 A
Connect on site:
■ Connected in series if both safety com-
ponents are installed
■ Insert jumper if no safety compo-
nents are installed
X2.1
X3.16
ON/OFF switch At the programming unit
Connection and wiring diagrams
Overview of the PCBs and connection options
(cont.)
5441 603 GB