Viessmann D2RA, Installation Instructions For Contractors

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80
Coding in the delivered condition Possible change
05:100
06:75 Max. speed of the solar circuit
pump 75 % of max. possible speed 06:1
to
06:100 Max. speed of solar circuit pump ad-
justable from 1 to 100 %.
07:0 Interval function of solar circuit
pump switched off 07:1 Interval function of the solar circuit
pump switched on.
To capture the collector temperature
more accurately, the solar circuit
pump periodically starts for a short
duration.
08:60 Set DHW temperature (maximum
cylinder temperature) 60 °C 08:10
to
08:90 Set DHW temperature adjustable
from 10 to 90 °C
09:130 Maximum collector temperature (to
protect system components)
130 °C 09:20
to
09:200 Temperature adjustable from 20 to
200 °C
0A:5 Temperature differential for stagna-
tion time reduction 5 K. Reduction
in the speed of the solar circuit
pump to protect system compo-
nents and heat transfer medium. 0A:0 Stagnation time reduction not active
0A:1
to
0A:40 Temperature differential adjustable
from 1 to 40 K
0b:0 Frost protection function for solar
circuit switched off 0b:1 Frost protection function for solar cir-
cuit switched on (not required with
Viessmann heat transfer medium).
0C:1 Delta T monitoring switched on.
No flow rate captured in the solar
circuit, or flow rate too low. 0C:0 Delta T monitoring switched off
0d:1 Night-time DHW circulation moni-
toring switched on.
Unintentional flow rate in the solar
circuit (e.g. at night) is captured. 0d:0 Night-time DHW circulation monitor-
ing switched off
0E:1 Heat statement in conjunction with
Viessmann heat transfer medium 0E:2 Never adjust
0E:0 No heat statement
0F:70 Solar circuit flow rate at maximum
pump speed 7 l/min 0F:1
to
0F:255 Flow rate adjustable from 0.1 to
25.5 l/min
1 step
≙
0.1 l/min
10:0 Target temperature control switch-
ed off (see coding address "11"). 10:1 Target temperature control switched
on
11:50 Set solar DHW temperature 50 °C
■
Target temperature control
switched on (code "10:1"):
temperature at which the solar
heated water is to be stratified
into the DHW cylinder.
■
If code "20:9" (heating of 2 DHW
cylinders) is set:
When the set DHW temperature
is achieved in one DHW cylinder,
the 2nd DHW cylinder is heated.
11:10
to
11:90 The set solar DHW temperature is
adjustable from 10 to 90 °C.
12:10 Minimum collector temperature
(minimum start temperature for the
solar circuit pump) 10 °C 12:0 No minimum limit enabled
12:1
to
12:90 Minimum collector temperature ad-
justable from 1 to 90 °C
Code 2
"Solar"
(cont.)
5678 044 GB
Codes