Viessmann VITOTRONIC 200 Service Instructions Manual page 298

PCBs and connection options
Luster terminals Vitocal 200-A
Terminals Function
X3.8 Frost stat and/or contact humidistat
X3.9 or
Jumper
X3.18 Heat pump control unit power supply:
Phase L1
X1.1 Earth conductor connection
X2.1 Neutral conductor connection
298
(cont.)
Explanation
Note
No parameters need to be set
■
No jumper should be installed if a power-OFF contact
■
is connected.
The compressor is "forced" off as soon as the contact
■
opens.
The power-OFF signal switches off the supply voltage
■
of the respective operating component (subject to the
power supply utility).
For the instantaneous heating water heater, the
■
stages to be switched off can be selected (parameter
"Output for instant. heating water heater at pow-
er-OFF 790A").
The power supply for the heat pump control unit
■
(3 x 1.5 mm
can be combined in a single 5-core cable.
In connection with Smart Grid:
The power-OFF signal must not be connected.
Jumper must be fitted.
Requires floating contact:
Closed: Safety chain has continuity
■
Open: Safety chain interrupted; heat pump shut down
■
Breaking capacity 230 V~, 0.15 A
■
Connected in series if both safety components are in-
■
stalled
Insert jumper if no safety components are instal-
■
led.
Power supply 230 V~
2
) and the cable for the power-OFF signal