Viessmann VITOCAL 300-G, Инструкции по установке и обслуживанию для подрядчиков

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35
Clamps Function 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 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
2
) and the cable for the power-OFF signal
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 installed.
X3.8
X3.9
P
Pressure switch, primary circuit
and/or
Requires floating contact:
■
Closed: Safety chain has continuity
■
Open: Safety chain interrupted; heat pump shut down
■
Breaking capacity 230 V~, 0.15 A
Connection:
■
Connected in series if 2 safety components are instal-
led
■
Insert jumper if no safety components are instal-
led.
Frost stat
or
Jumper
X3.12
X3.13
or at external
EA1 extension "External demand" signal: External
starting of compressor and pumps;
mixer in control mode or OPEN,
changeover of the operating status of
several system components Requires floating contact:
■
Closed: Demand
■
Open: No demand
■
Breaking capacity 230 V~, 2 mA
Note
These and further external functions (e.g. provision of
external set values) can alternatively be connected via
the external EA1 extension.
See "EA1 extension" installation instructions
X40 Heat pump control unit power supply:
Phase L or L1
X40.
?
Earth conductor terminal
X40.N Neutral conductor terminal
Power supply 230 V~: See chapter "Power supply".
Controller and sensor PCB (extra low voltage (ELV) connections)
Set the required parameters during commissioning:
See page 51 onwards.
Installation sequence
Electrical connection
(cont.)
6153640
Installation