Viessmann VITOTRONIC300 Installation And Service Instructions Manual page 90

Code 1
"General" Group
Coding in the factory set condition
Servomotor runtime
40:...
Runtime, isolation valve servomotor at plug gSA1.
Factory set condition defaulted by boiler coding
card.
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).
User no.
77:1 LON participant number.
Detached house/apartment building
7F:1 Detached house
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).
Set supply temperature for external demand
9b:70 Set minimum boiler water temperature for external
demand 158°F (70°C).
90
(continued)
Vitotronic 300, GW2B Installation and Service
Possible change
40:5 Runtime adjustable from 5 to 199 sec.
to
40:199
53:0 Boiler circuit pump always runs when there
is demand.
77:1 LON participant number,
to adjustable from 1 to 99:
77:99 1 = boiler control unit
10 - 97 = Vitotronic 200-H
98 = Vitogate
99 = Vitocom
Note: Each number must only be assigned
once.
7F:0 Apartment building
Separate adjustment of holiday program and
time program for DHW heating possible.
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
9b:0 Set value adjustable from 32 to 260°F
to (0 to 127°C) (limited by boiler specific
9b:127 parameters).