Viessmann Vitocal 350-A Installation And Service Instructions Manual page 97

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