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

Page: 37 / 124

37
Function components 230 V~
Plug
sYA
Terminals Function Explanation
211.1
1.
Primary pump Connection values
■ Output: 200 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Connected at the factory.
211.2
1.
Secondary pump ■ In systems without a heating water
buffer cylinder, no other heating circuit
pump is required (see terminal 212.2)
■ Connect temperature limiter as maxi-
mum temperature limiter for underfloor
heating circuit (if installed) in series
(see the following chapter)
Connection values
■ Output: 130 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Connected at the factory.
211.5
NC
Cooling control
NC function (natural cool-
ing) On-site connection: NC-Box or on-site
components for natural cooling.
Connection values
■ Output: 10 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Installation sequence
Electrical connection
(cont.)
5601 598 GB
Installation