Viessmann VITOCAL 300-A Installation And Service Instructions Manual page 94

Installation sequence
Electrical connections in the control unit
C External extension H1
D Zero volt contact "Ext. demand"
E Heat pump 2 (lag appliance)
Connection at the contact for "Ext.
demand"
F Zero volt contact "Ext. demand"
G Heat pump 3 (lag appliance)
Connection at the contact for "Ext.
demand"
Required parameter (code to be entered by "Contractor": 5243)
Equipment
Lead appliance
Lag appliance
Note
Set the parameters for all lag appli-
ances.
94
(cont.)
H Zero volt contact "Ext. demand"
K Heat pump 4 (lag appliance)
L Input for central fault message
facility, lag appliance
Open contact 1X3.10/1X3.11 trig-
gers a message (see central fault
message, page 91).
Parameter (ID) Ó Setting
"System definition"
"System diagram" (7000) Ó "11"
&
"Cascade control" (700A) Ó "1"
&
"Ext. extension" (7010) Ó "Yes"
&
"Output lag heat pump" (700B) Ó
&
"0" to "255" (see page 134)
"No. of ext. heat p" (5735) Ó "1" to
&
"3" (see page 134)
"System definition"
"Cascade control" (700A) Ó 0
&
"Set flow ex. demand" (730C) Ó
&
"0" to "70" (see page 156)