Fitting And Connecting The Control Unit; Making The Safety Connections; Safety Valve - Viessmann Vitocrossal 300 Installation Instructions For Contractors

Control unit installation

Fitting and connecting the control unit

4.
Fig. 21
Type plate
A
Mounting bracket, fascia
B
Boiler control unit installation and service
instructions
2. After connecting the cables, secure mounting
bracket fascia to the mounting bracket.
B

Making the safety connections

Safety valve

Equip boilers with a safety valve that is individually tes-
ted to EN 12828 and is marked according to the sys-
tem version.
Permiss. operating pres-
sure:
Test pressure:
1. Make the safety connections. See
on page 16
(cont.)
2.
A
B
6 bar (0.6 MPa)
7.8 bar (0.78 MPa)
in diagram
C
1.
3.
4. Remove the lower section (with barcode) from the
small type plate of the heat exchanger module.
Attach this section to the type plate for the whole
boiler.
Affix boiler type plate
panel on the accessible side.
2. Check the connections on the heating water side
for leaks.
!
Please note
Mechanically loaded hydraulic connections lead
to leaks, vibrations and appliance damage.
Make all pipe connections free of load and tor-
que stress.
to the front of the side
A
27