Viessmann Vitocal 350-A Installation And Service Instructions Manual page 98

Installation sequence
Electrical connections in the heat pump control...
Installation instructions "External extension H1"
Note
If swimming pool heating is connected to "External extension H1", no hook-up (e.g.
operating mode changeover) can be connected to "External extension H1".
External demand, external mixer "OPEN", operating mode changeover
1X3.13
A B
1X3.12
A Terminals on PCB 1
B Zero volt N/O contact outside the
heat pump control unit (on site)
Breaking capacity 230 V~; 0.1 A
Required parameters (code to be entered by "Contractor": 5243)
Function
External demand
External mixer "OPEN"
External operating mode
changeover
98
Parameter Ó setting
No parameters need to be set; the set flow tem-
perature for external demand can be specified
(parameter "Set flow ext. demand", see
page 193).
"System definition"
■ "Ext.demand/Miopen" Ó "0" to "7" (see
page 175). Observe parameter "Set flow ext.
demand" (see page 193).
"System definition"
■ "Op. mode change HC" Ó "0" to "10" (see
page 173)
■ "Op. mode change effect" Ó "0" to "3" (see
page 174)
■ "Op. mode change time" Ó "0" to "12" (see
page 174)
(cont.)