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5790 733 - 07
Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Electrical Connections
(continued)
Installation
Connecting External Safety Equipment
Connection at plug
aBÖ
.
Note:
‘Live’ contacts lead to short circuits or phase failure.
The external connection must be potential-free.
1. Remove jumper from terminals 17(L) and 18(L), 19(L)
and 20(L) or 21(L) and 22(L).
2. Make connection of the safety equipment to 17(L) and
18(L), 19(L) and 20(L) or 21(L) and 22(L).
Legend
A
Minimum pressure limiter
B
Maximum pressure limiter
C
Further safety equipment
Note:
Periphery equipment attached to the
aBÖ
plug must
be operated on a normally closed circuit.
*
Factory Installed high limit temperature switches
(refer to page 107 for additional information).
*
*