Vaillant flexoTHERM exclusive VWF 117/4 Installation And Maintenance Instructions Manual page 25

9 [X145] External auxiliary heating
10 [X1A] 230 V supply for controller PCB
11 [X144] External 3-way valve
12 [X105] Connection for compressor with in-rush cur-
rent limiter
13 [X20A] Connection for controller PCB communica-
tion line
14 LED safety switch for compressor
15 [X201] (not used)
16 [X200] Optional temperature sensors for groundwa-
ter module
17 [X203] Optional flow temperature sensor for heating
circuit with passive cooling module
0020213394_01 flexoTHERM exclusive Installation and maintenance instructions
Electrical installation 8
18 [X202] (not used)
19 [X90] (not used)
20 [X140] Connection for 3-way diverter valve for pass-
ive cooling module
21 [X142] 3-way mixer valve for passive cooling module
22 [X104] Internal auxiliary electric heating connection
23 [X131] Optional external brine pressure switch con-
nection
24 [X750] Safety cut-out for internal auxiliary electric
heating
25 LED safety switch for auxiliary electric heating
26 [X141] Signal output for active cooling mode
27 [X143] Well pump
25