Viessmann VITOTRONIC 200 Installation And Service Instructions Manual page 92

Coding 2 Vitotronic 300-K
"Solar" Group
Coding in the factory set condition
"Stagnation time reduction"
0a:5 Temperature differential for reducing the
stagnation time (reduction in solar circuit
pump speed to protect system components
and heat transfer medium) 5 K
"Frost protection function for solar circuit"
0b:0 Frost protection function for solar circuit
switched off.
"Delta T monitoring"
0c:1 Delta T monitoring switched on
No flow rate captured in the solar circuit, or
flow rate too low.
"Night circulation monitoring"
0d:1 Night circulation monitoring switched on.
Unintentional flow in the solar circuit
(e.g. at night).
"Calculation of solar yield"
0e:1 Heat statement in conjunction with Viessmann
heat transfer medium
"Solar circuit flow rate"
0f:70 Solar circuit flow rate at maximum pump
speed 1.8 USG/min (7L/min).
"Target temperature control"
10:0 Target temperature control switched off
(see coding address "11").
"Set solar DHW temperature"
11:50 Set solar DHW temperature 122°F (50°C).
- Target temperature control switched on
(code "10:1"):
Temperature at which the water in the DHW
tank heated by solar energy is to be
stratified.
- Code "20:9" (heating of two DHW tanks)
selected:
When one DHW tank reaches its set
DHW temperature, the second DHW tank
is heated.
92
(continued)
Vitotronic 200, HO1B and 300-K, MW2C Installation/Service
Possible change
0a:0 Stagnation time reduction disabled.
0a:1 Temperature differential adjustable from
to 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 Do not adjust!
0e:0 No heat statement
0f:1 Flow rate adjustable from 0.02 to 6.7 USG/min
to (0.1 to 25.5 L/min).
0f:255 1 step 0.02 USG/min (0.1 L/min).
10:1 Target temperature control switched on.
11:10 Set solar DHW temperature adjustable from
to 50 to 144°F (10 to 90°C).
11:90