![Viessmann VITOTRONIC 300 GW2B Installation And Service Instructions Manual Download Page 90](http://html1.mh-extra.com/html/viessmann/vitotronic-300-gw2b/vitotronic-300-gw2b_installation-and-service-instructions-manual_1017725090.webp)
Vitotronic 300, GW2B Installation and Service
5693 982 - 04
90
“General” Group
(continued)
Code 1
Coding in the factory set condition
Possible change
Servomotor runtime
40:...
Runtime, isolation valve servomotor at plug
gS
A1.
Factory set condition defaulted by boiler coding
card.
40:5
to
40:199
Runtime adjustable from 5 to 199 sec.
Internal circulation pump function
53:1
With low loss header:
Boiler circuit pump only runs when there is demand
if the burner is operational (with run-on time).
53:0
Boiler circuit pump always runs when there
is demand.
User no.
77:1
LON participant number.
77:1
to
77:99
LON participant number,
adjustable from 1 to 99:
1 = boiler control unit
10 - 97 = Vitotronic 200-H
98 = Vitogate
99 = Vitocom
Note:
Each number must only be assigned
once.
Detached house/apartment building
7F:1
Detached house
7F:0
Apartment building
Separate adjustment of holiday program and
time program for DHW heating possible.
General
8F:0
Operation in the standard menu and extended
menu enabled.
Note:
The respective code is only activated when
you exit the service menu (see page 81).
8F:1
Operation in the standard menu and extended
menu blocked.
8F:2
Operation enabled in the standard menu;
blocked in the extended menu.
Set supply temperature for external demand
Set supply temperature for external demand
9b:70
Set minimum boiler water temperature for external
demand 158°F (70°C).
9b:0
to
9b:127
Set value adjustable from 32 to 260°F
(0 to 127°C) (limited by boiler specific
parameters).