External Connections On Plug Abö - Viessmann VITOTRONIC 100 Installation And Service Instructions Manual

Installation
External connections on plug aBÖ
!
Please note
'Live' contacts lead to short circuits or phase failure.
The external connections must be zero volt.
Plug aBÖ must remain plugged in, even if no connection is made.
The plug−in adaptor for external safety equipment can be used for connecting
several pieces of safety equipment (see page 136).
A
A Jumper "STB"
B Jumper "TR" "ON/TR"
C External blocking
(zero volt contact)
D Low water indicator
E Maximum pressure limiter
F Supplementary external safety
equipment
External safety equipment
H Remove jumper "STB"
H Connect electrical safety
equipment in series.
84
C
ON ON
B
"STB"
"STB".
D
E
F
Emergency mode
Change jumper "TR"
"TR" "ON".
External burner blocking
H Remove jumper "TR"
H Connect the zero volt contact.
Opening this contact leads to a
controlled shutdown.
"ON/TR" to
"TR".