Viessmann FB2B Installation And Service Instructions Manual page 68

Code 1
General
(cont.)
Coding in the delivered condition
Internal circulation pump function
51:0 System with low loss
header:
Internal circulation pump
always starts when there
is a heat demand.
Subscriber no.
77:1 LON subscriber number
Detached house/apartment building
7F:1 Detached house
Lock out controls
8F:0 All control elements
active
68
Possible change
51:1 System with low loss
header:
When there is a heat
demand, the internal circu-
lation pump will only be
started when the burner is
operational.
51:2 System with heating water
buffer cylinder:
When there is a heat
demand, the internal circu-
lation pump will only be
started when the burner is
operational.
77:2 LON subscriber number,
to adjustable from 1 to 99:
77:99 1 - 4 = Boiler
5 = Cascade
10 - 98 = Vitotronic 200-H
99 = Vitocom
Note
Allocate each number only
once.
7F:0 Apartment building
Separate adjustment of
holiday program and time
program for DHW heating,
as option
8F:1 All control elements locked
out
8F:2 Only standard settings can
be controlled