Viessmann VITOCAL 300, Installation And Service Instructions Manual

Page: 136 / 160

E
Implemented as individual free
core outside the PCB
F
On relay contact K1 on the control
PCB (see page 137)
G
Jumper (or optionally for DHW
version: Frost stat and flow
switch)
eP
Brine pressure switch * 1
eQ
Power-OFF (accessory) * 2
eW
Thermal overload relay, primary
pump
eE
Safety high pressure limiter, com-
pressor
eR
Low pressure, compressor
eT
Control high pressure, compres-
sor
eZ
Thermal overload relay, compres-
sor
tO
Frost stat/flow switch in series (for
type WWC)
* 3
Safety chain
(cont.)
136
Connection and wiring diagrams
55
92
901
GB
*1
If not connected, insert the jumper supplied between terminal 5 and 6.
*2
If not connected, insert the jumper between terminal 7 and 8.
*3
If not connected, insert the jumper between terminal 1 and 2.