Viessmann VITOCAL 350-A, Installation And Service Instructions Manual

Page: 97 / 256

97
2X7.1
2X7.2
A
1X3.1
1X2.N
C
B
K1
D
A
Terminals on PCB 2: Contact load
230 V~, 4(2) A, zero volt contact
B
Transfer jumper from 1X3.1 (PCB 1)
to 2X7.1 (PCB 2)
C Connection at the external heat
source on the terminals for external
demand
D
High limit safety cut-out (this is set
to 70 °C) as heat pump protection
K1 Relay; sizing in accordance with the
external heat source; observe
safety instructions
Appliance Connection Required parameters:
Parameter
Ó
setting
Mixer motor, external heat
source 2X7.7
V
OPEN
1X1.
?
1X2.N
2X7.8
v
CLOS
E
(see page 43)
"Ext. heat source"
■ "Ext. heat source"
Ó
"Yes"
Control of an external heat
source 2X7.1
2X7.2
(see page 43) "Ext. heat source"
■ "Ext. heat source"
Ó
"Yes"
Circulation pump for DHW
reheating
Note
Not possible in conjunction with
an immersion heater EHE for a
DHW cylinder (see
pages 34, 48)
2X8.13
1X1.
?
1X2.N
(see page 44)
"Ext. heat source"
■ "Ext. heat source"
Ó
"Yes"
External hook-up
The external components can also be hooked up via "External extension H1".
Installation sequence
Electrical connections in the heat pump control…
(cont.)
5414 828 GB
Installation