Viessmann Vitocal 242-S, Инструкция по установке и обслуживанию

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51
Plug sYA
Terminals Function Explanation
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.
Connection values
■ Output: 130 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Secondary pump connected at the fac-
tory; the temperature limiter must be
connected on site.
211.5
AC
Cooling control
3-way diverter valves for
heating water buffer cylinder
bypass in cooling mode Connection values
■ Max. output: 10 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Connect the 3-way diverter valves for the
bypass circuit in parallel.
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 a max-
imum temperature limiter for under-
floor heating circuit (if installed) in ser-
ies (see following chapter)
Connection values
■ Output: 100 W
■ Voltage: 230 V~
■ Max. switching current: 4(2) A
Installation sequence
Electrical connection
(cont.)
5623 661 GB
Installation