Installing The System Control In The Electronics Box; Opening The Electronics Box; Cable Route; Connecting A Limit Thermostat For The Underfloor Heating - Vaillant VWL 57/5 IS Operating, Installation And Maintenance Instructions

6.7 Installing the system control in the
electronics box
A
C
1. Remove the cover from the electronics box.
Connect the DIF cable – laid out ready – to the system
2.
control or to the radio receiver.
3. If you are using a radio receiver, use the mobile base
station.
4. If you are using the wired system control, use the sys-
tem control.
5. Consult the instructions for the system control for in-
formation on coupling the mobile base station and the
system control.
6.8

Opening the electronics box

1. Remove the front casing. (→ Page 25)
0020257319_02 Hydraulic station Installation and maintenance instructions
2.
1
3.
B
6.9
▶
6.10
Condition: If you are connecting a limit thermostat for underfloor heating:
▶
▶
▶
Electrical installation 6
C
B
Hinge the electronics box (1) forwards.
Detach the four clips (3), on the left and the right, from
the brackets.

Cable route

24V / eBUS
Route the 24 V cable and the eBUS cable through the
left-hand strain reliefs on the electronics box.
Connecting a limit thermostat for the
underfloor heating
Route the 230 V cable through the right-hand strain re-
liefs on the electronics box.
Pull out the S20 plug for the bypass line at terminal
X100 on the control PCB.
Connect the limit thermostat to plug S20.
A
230V
31