Viessmann VITOTRONIC 300 GW2 Installation And Service Instructions Manual page 127

Coding 2
(continued)
Overview of all codings (continued)
Coding as per Function
factory setting
Address: Value
9C: 20 General
9d: 0 General
9F: 8 General
A0: 0
Boiler
circuit/
mixing mixing
valve
circuit
A2: 2 Boiler
circuit/
mixing
valve
circuit
A3: 2 Boiler
circuit/
mixing
valve
circuit
A4: 0 Boiler
circuit/
mixing
valve
circuit
Monitoring of LON
participants
If a participant does not If a participant does not
answer back, default values
set within the control unit
are used for the first 20
minutes. The an error
message is transmitted
Without Input module 0-10V 9d: 1
Differential temperature 8 K
only in conjunction with
mixing valve circuit
Without remote control
With DHW tank priority
control over heating circuit g
pump and mixing valve
The heating circuit pump is
switched on at outdoor
temperatures below 1 °C /
34 °F.
The heating circuit pump is
switched off at outdoor
temperatures above 3 °C /
37 °F.
Safety instruction:
At settings below 1 °C /
34°F there is a risk that
piping outdside the
insulation of the building
may freeze, e.g. pipes in
the roof space, to the
garage,in radiator alcoves,
etc. Pay particular
attention to the standby
mode, e.g. during holiday
periods.
With frost protection
New coding Possible change
Address:
Value
9C: 0 No monitoring
9C: 1 Time selectable
to from 1 to 60 minutes
9C: 60
With Input module; automatically recognized
05: 0 Differential temperature selectable from 0 to
to 40 K
05: 40
A0: 1 With Vitotrol 200 remote control
A0: 2 With Vitotrol 300 remote control
A2: 0 Without DHW tank priority control over heating
circuit pump and mixing valve
*1
A2: 1 The mixing valve is closed and the heating
circuit pump is ON when the DHW tank is
being heated
*1
A2: 3 Reduced DHW tank priority over mixing valve;
to i.e. the heating circuit is supplied with a
A2: 15 reduced amount of heat
Heating circuit pump
See conversion chart at back of manual for °F
A3: –9 ON at OFF at
A3: –8 –10°C –8°C
A3: –7 –19°C –7°C
A3: –6 –18°C –6°C
A3: –5 –17°C –5°C
A3: –4 –16°C –4°C
A3: –3 –15°C –3°C
A3: –2 –14°C –2°C
A3: –1 –13°C –1°C
A3: –0 –12°C –0°C
A3: –1 –11°C –1°C
A3: –2 –10°C –2°C
. –11°C –3°C
-1. -1
.
. -1. -1
A3: 15 -1. -1
-14°C 16°C
A4: 1 No frost protection.
Setting only possible when coding
"A3: –9" is set.
Please note:
See safety instruction above.
Additional information
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127