Viessmann VITODENS 200-W Service Instructions Manual page 63

Vitodens 200-W B2HA 112, 150 Service
Heating Circuit 1, 2 and 3
Coding in the factory setting
A4:0
A5:5
Parameter address A5:...
1
2
3
4
5
6
7
to
15
Coding in the factory setting
A6:36
A7:0
(continued)
With frost protection
With heating circuit pump logic
function (economy mode):
Heating circuit pump "OFF"
when the outside temperature
(AT) is 1 K higher than the set
room temperature (RTset) AT >
RTset + 1 K
With heating circuit pump logic function: Heating circuit pump "OFF"
AT > RTset + 5 K
AT > RTset + 4 K
AT > RTset + 3 K
AT > RTset + 2 K
AT > RTset + 1 K
AT > RTset
AT > RTset - 1 K
AT > RTset - 9 K
Extended economy function
disabled
Without mixing valve economy
function
Possible change
A4:1 No frost protection; this setting is
only possible if code "A3:-9" has
been selected.
Note: "Important" also coding
A5:0 Without heating circuit pump logic
function.
A5:1 With heating circuit pump logic
to function: Heating circuit pump
A5:15 "OFF"; see following table:
Possible change
A6:5 Extended economy function
to enabled, i.e. the burner and heating
A6:35 circuit pump will stop and the
mixing valve close at a variable
value, adjustable between 41 and
95°F (5 and 35°C) plus 1.8°F
(1°C). The base value
is the adjusted outside temperature.
This value is based on the actual
outside temperature and a time
constant, which takes the cooling
down of an average building into
consideration.
A7:1 With mixing valve economy
function (extended heating circuit
pump logic):
Heating circuit pump also "OFF":
- If the mixing valve has been
attempting to close for longer
than 20 minutes.
- Heating circuit pump "ON":
If the mixing valve changes to
control function.
- If there is a risk of frost.
Coding 2
address "A3".
63