Viessmann VITOTRONIC 300 Installation And Service Instructions Manual page 96

Code 2, Vitotronic 300-K
"Solar" Group
Coding in the factory set condition
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 7 L/min.
10:0 Target temperature control switched off (see
coding address "11").
11:50 Set solar DHW temperature 122° 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.
20:0 No extended control functions enabled.
22:8 Start temperature differential for central
heating backup: 8 K.
Switching output sS is switched on when
the temperature at sensor / exceeds the
temperature at sensor aÖ by the selected
value.
96
(continued)
Vitotronic 300, GW5B & MW1B Installation and Service
Possible change
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 0.1 to 25.5 l/min.
to 1 step 0.1 l/min
0F:255
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 is
to adjustable from 1
12:90
20:1 Additional function for DHW heating.
20:2 Differential temperature control 2.
20:3 Differential temperature control 2 and auxiliary
function.
20:4 Differential temperature control 2 for central
heating backup.
20:5 Thermostat function.
20:6 Thermostat function and auxiliary function.
20:7 Solar heating via external heat exchanger
without additional temperature sensor.
20:8 Solar heating via external heat exchanger with
additional temperature sensor
20:9 Solar heating of two DHW tanks.
22:2 Start temperature differential for central
to heating backup is adjustable from 2 to 30 K.
22:30