Viessmann Vitocal 300-G Installation And Service Instructions Manual page 76

Installation sequence
Positioning of all terminals
Equipment
Mixer motor, exter- 2X7.7VOPEN
nal heat source 1X1.?
1X2.N
2X7.8vCLOSE
(see page 47)
Control of an exter- 2X7.1
nal heat source 2X7.2
Circulation pump
for cylinder heating
(cylinder reheating)
2X8.13
A Heat pump connection: Contact
load 230 V, 4(2) A, zero volt con-
tact (do not switch low voltage)
B Transfer jumper from 1X3.1 to
2X7.1
C Connection at the external heat
source on the terminals for exter-
nal demand
76
(cont.)
Connection Comments
ID
Directly controlled mixer without KM
BUS
Control via zero volt contact; ob-
serve contact load
7B00 External heat source
When using this pump, immersion
heater EHE cannot be used for DHW
heating.
7B0D Ó Yes (ext. heat source)
D High limit safety cut-out (STB, set
to 70 °C) as heat pump protection
K1 Sizing in accordance with the
external heat source; observe
safety instructions
Setting parameters (group)
No parameters need to be
set.
Ó Yes (ext. heat source)