27
Plug
sYA
Terminals
Function
Explanation
211.2
Additional
secondary pump to in-
crease residual head
■
Installation outside the heat pump
in the secondary circuit flow
■
No switching via PWM signal from
the heat pump control unit
■
In systems without a buffer cylinder, no other heating
circuit pump is required: See connection 212.2.
■
Connect a temperature limiter in series to restrict the
maximum temperature of underfloor heating circuit (if
installed).
Supply values
■
Output: 140 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
Note
■
The factory-fitted secondary pump
is connected to the EEV PCB: See
chapter "Overview of electrical com-
ponents".
■
The factory-fitted secondary pump
must be operated at a constant
100 % speed ("Rated output sec-
ondary pump (PWM) 7343" at
"100").
211.5
NC
Cooling control via NC-Box
NC function (natural cooling)
Connection values
■
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
Plug
sYS
Terminals
Function
Explanation
212.1
AC
Control of active cooling function
Components for AC cooling
Supply values
■
Output: 10 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
212.2
A1
Heating circuit pump for heating cir-
cuit without mixer A1/HC1
■
This pump is connected in addition to the secondary
pump if a heating water buffer cylinder is installed.
■
Connect a temperature limiter in series to restrict the
maximum temperature of underfloor heating circuit (if
installed).
Note
In systems without heating water buffer cylinder the
temperature limiter is connected to X3.2/X3.14 at the
luster terminals: See chapter "Temperature limiter to re-
strict the maximum temperature of underfloor heating".
Supply values
■
Output: 100 W
■
Voltage: 230 V~
■
Max. switching current: 4(2) A
Installation sequence
Electrical connection
(cont.)
6153640
Installation
