Controller And Sensor Pcb (Sensors) - Viessmann Vitocal 350-A AWHO 351.A Series Installation And Service Instructions Manual

Installation sequence
Heat pump control unit electrical connections
Terminals Function
X3.8 Contact humidistat
X3.9 or
Jumper
X3.10 Fault message, lag heat pump in a cas-
X3.11 cade
or
Jumper
X3.12 "External demand" signal (external starting
X3.13 of compressor and pumps, mixer in control
or at external mode or OPEN, changeover of operating
H1 extension status for several system components)
X3.17 MCB/fuse F1 6.3 A (slow)
X3.18
X5/X7 Control cable 230 V~

Controller and sensor PCB (sensors)

Set the required parameters during commissioning;
see from page 73.
Plug Sensors/terminals
F0 Outside temperature sensor
F4 Buffer temperature sensor
(X5.6/X5.7)
54
(cont.)
Explanation
Requires floating contact:
Closed: Safety chain has continuity.
■
Open: Safety chain interrupted; heat pump shut
■
down.
Breaking capacity 230 V~, 0.15 A
■
Connect on site:
Connected in series, if both safety components
■
are installed.
Insert jumper if no safety components are
■
installed.
Requires floating contact:
Closed: No faults
■
Open: Fault
■
Breaking capacity 230 V~, 0.15 A
■
No jumper should be installed if a message con-
tact is connected.
Requires floating N/O contact:
Closed: Demand
■
Open: No demand
■
Breaking capacity 230 V, 2 mA
■
Note
These or other 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.
Terminals for connecting cable to the control pan-
el
Note
Plug F11:
■
Nothing should be connected to plug F11 on site.
■ Flow temperature sensor for heating circuit with
mixer (M3):
The flow temperature sensor for one heating circuit
with mixer (M3) is connected to the mixer extension
kit (accessories).
Type
(PTC)
Ni500
Pt500