Viessmann VITOCAL 300-A Installation And Service Instructions Manual page 92

Installation sequence
Electrical connections in the control unit
Swimming pool water heating
Note
& Connect only the circulation pump
for swimming pool water heating E
according to the following diagram.
Never connect a filter circuit pump.
& Control of swimming pool water
heating via "Ext. extension H1" with
KM BUS (cores interchangeable).
& Make connections to "Ext. exten-
sion H1" only according to the fol-
lowing diagram.
A Terminals on PCB 3
B KM BUS
C Ext. extension H1
D Three-way diverter valve "Swim-
ming pool"
Required parameter (code to be entered by "Contractor": 5243)
Parameter (ID) Ó Setting
"System definition"
"Ext. extension" (7010) Ó "Yes"
&
"Swimming pool" (7008) Ó "Yes"
&
92
(cont.)
E Circulation pump for swimming
pool water heating (accessory)
F Thermostat for swimming pool
temperature control (zero volt
contact, 230 V~; 0.1 A; acces-
sory)