Viessmann Vitocal 350-A AWHI 351.A14, Инструкция по установке и обслуживанию

Страница: 53 / 140

53
Terminals Function Explanation
X3
■
Power supply terminals of control unit
"L1" and auxiliary components
■
Switched phase L1:
X3.1, X3.2, X3.3, X3.7, X3.11, X3.13
Terminals for signal and safety connections
Note
Switched phase can be used for on-site system
components. Observe max. output.
X3.1 Switched phase
X3.2
X3.14
or at external
H1 extension "External blocking" signal (external blocking
of compressor and pumps, mixer in control
mode or CLOSE)
Note
The system may no longer be protected
against frost.
Requires floating N/O contact:
■
Closed: Blocking enabled
■
Open: No blocking
■
Breaking capacity 230 V~, 2 mA
Note
■
These and further external functions, such as
swimming pool heating, cascade or external set
value default can alternatively be connected via
external H1 extension.
"External H1 extension" installation in-
structions
■
If a swimming pool heating facility is connected
to external H1 extension,
no other external
function can be connected to external H1 exten-
sion.
X3.6
X3.7
G
Power-OFF Requires floating N/C contact:
■
Closed: No blocking (safety chain continuous)
■
Open: Blocking enabled
■
Breaking capacity 230 V~, 0.15 A
No jumper should be installed if a power-OFF
contact is connected.
Note
■
No parameters need to be set.
■
As soon as the contact opens, the compressor
is "forced" OFF.
■
The power-OFF contact signal causes the sup-
ply voltage to the relevant components to be
switched off (subject to power supply utility).
■
For the instantaneous heating water heater, the
stages to be switched off can be selected (pa-
rameter
"Output for instant. heating water
heater at power-OFF" ).
■
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.
■
For further information regarding power-OFF,
see chapter "Power supply".
Installation sequence
Heat pump control unit electrical connections
(cont.)
5692878
Installation