Viessmann VITOTRONIC300 Installation And Service Instructions Manual page 112

Code 2
"Solar" Group
Coding in the factory set condition
0A:5 To protect system components and heat
transfer medium:
The solar circuit pump speed is reduced when
the actual DHW tank temperature is 5 K
below the maximum DHW tank temperature.
0b:0 Frost protection function for solar circuit
switched off.
0C:1 Delta T monitoring switched on.
No flow rate captured in the solar circuit,
or flow rate too low.
0d:1 Night circulation monitoring switched on.
Unintentional flow rate is captured in the solar
circuit (e.g. at night).
0E:1 Calculation of solar yield with Viessmann heat
transfer medium.
0F:70 The solar circuit flow rate at maximum pump
speed is 1.9 USG/min. (7 L/min.)
10:0 Target temperature control switched off
(see coding address "11").
11:50 Set solar DHW temperature 68°F (50°C).
- Target temperature control
switched on (code "10:1"):
Temperature at which the solar heated
water in the DHW tank is to be stratified.
- Extended control functions set to
heat two DHW tanks (code "20:8"):
The second DHW tank is heated when
one DHW tank reaches its set DHW
temperature.
12:10 Minimum collector temperature 50°F (10°C).
The solar circuit pump will only start when
the set minimum collector temperature
is exceeded.
112
(continued)
Vitotronic 300, GW2B Installation and Service
Possible change
0A:0 Stagnation time reduction is disabled.
0A:1 Value for stagnation time reduction
to is adjustable from 1 to 40 K.
0A:40
0b:1 Frost protection function for solar circuit
switched on (not required with Viessmann heat
transfer medium).
0C:0 Delta T monitoring switched off.
0d:0 Night circulation monitoring switched off.
0E:2 Calculation of solar yield with water as heat
transfer medium (never adjust, as operation
is only possible with Viessmann heat transfer
medium).
0E:0 Calculation of solar yield switched off.
0F:1 Flow rate adjustable from
to 0.03 to 6.7 USG/min. (0.1 to 25.5 L/min);
0F:255 1 step 0.03 USG/min. (0.1 L/min.)
10:1 Target temperature control switched on.
11:10 The set solar DHW temperature is adjustable
to from 50 to 194°F (10 to 90°C).
11:90
12:0 Minimum collector temperature function disabled.
12:1 The minimum collector temperature
to is adjustable from 34 to 194°F (1 to 90°C).
12:90