Viessmann BWT 241.A Series, Installation And Service Instructions Manual

Page: 38 / 124

38
Plug
sYS
Terminals Function Explanation
212.2
A1
Heating circuit pump, heat-
ing circuit without mixer
(A1) ■ This pump is connected in addition to
the secondary pump if a heating water
buffer cylinder is installed.
■ Connect temperature limiter as maxi-
mum temperature limiter for underfloor
heating circuit (if installed) in series
(see the following chapter)
Connection values
■ Output: 100 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Connect on site.
212.3 DHW circulation pump Connection values
■ Output: 50 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Connect on site.
212.4 Solar circuit pump with high
limit safety cut-out (max. 95
°C) for DHW cylinders Connection values
■ Output: 130 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Connect on site.
Connect the high limit safety cut-out to
the solar circuit pump
in series (see high
limit safety cut-out installation instruc-
tions).
Installation sequence
Electrical connection
(cont.)
5601 598 GB