167
5790 733 - 07
Vitocrossal 300 CA3 Series 2.5 to 6.0 Installation/Service
Coding Level 2
“Heating Circuit ...” Group
(continued)
Coding in the factory set condition
Possible change
“Extended economy mode”
a6:36
Extended economy mode disabled.
a6:5
to
a6:35
Extended economy mode enabled,
i.e. the burner and heating circuit pump
will stop and the mixing valve will be
closed at a variable value, adjustable
between 41°F to 95°F (5°C and 35°C)
plus 2°F (1°C). The base value is
the adjusted outdoor temperature. This
value is based on the actual outdoor
temperature and a time constant, which
takes the cooling down of an average
building into consideration.
“Mixing valve economy function”
a7:0
Only for heating circuits with mixing
valve:
Without mixing valve economy function.
a7:1
With mixing valve economy function:
Heating circuit pump also OFF:
H
Mixing valve switched on to heating
circuit pump longer than 20 min:
H
Mixing valve in control mode
H
If there is a risk of frost
“Pump idle time”
a9:0
Without pump idle time.
a9:1
to
a9:15
Pump idle time adjustable from 1 to 15.
1: Short idle time
15: Long idle time
“Output reduction”
aa:2
With output reduction through
temperature sensor
aJ
A
.
aa:0
Without output reduction.
aa:1
No function.
“Room temperature hook-up”
b0:0
With remote control:*1
Heating mode/reduced mode:
Weather-compensated.
b0:1
Heating mode: Weather-compensated
Reduced mode:
with room temperature hook-up
b0:2
Heating mode: with room temperature
hook-up
Reduced mode: Weather-compensated
b0:3
Heating mode/reduced mode:
with room temperature hook-up.
“Room influence factor”
b2:8
With remote control and for the heating
circuit, operation with room temperature
hook-up must be programmed:
Room influence factor 8.
b2:0
Without room influence.
b2:1
to
b2:31
Adjustable from 1 to 31.
“Room temperature-dependent heating circuit pump logic function”
b5:0
With remote control:
No room temperature-dependent
heating circuit pump logic function.
b5:1
to
b5:8
For heating circuit pump logic function,
see the following table on page 168.
*1 Only change the coding for the heating circuit without mixing valve A1 for boilers without lower temperature
limit or for heating circuits with mixing valve if a remote control is connected to them.
