19
DHC 23
SERVICE BY THE HEATING SPECIALIST
■■
Overview of operating parameters DHC 23-2
q
Turn programming switch into
auto
position..
w
Different values can be displayed by turning the service switch into the positions
0 ... F (see Table).
e
The parameters can then be changed with the aid of the push and turn knob.
■■
Overview of operating parameters DHC 23-2
Position Operating parameter
Range
Basic setting
0
Time
0:00...23:59
current time
1
Day, month or year
1990...2089
current date
2
Max. flow setpoint
30 ... 120°C
90°C
3
Night setpoint
0...20°C
10°C
4
Frost protection limit
-10...15°C
2°C
5
Heating characteristic slope
0.4...4.5
1.6
6
Building construction
for optimization
0, 1, 2, 3
0
0 = optimization off
1 = light construction
2 = medium construction
3 = heavy construction
7
Valve actuator M1 running time
10...1800 s
120 s
8
Valve actuator M2 running time
10...1800 s
30 s
9
Max. inlet temperature in *
40...90°C
90°C
WW heat exchanger (VF
1
)
A = 10
District heating valve minimum lift
0...30 %
0 %
B = 11
Maximum district heating return
40...90°C
90°C
temperature in heating mode
C = 12
Onset point of floating district
-20...10°C
10°C
heating return temperature limitation
D = 13
Reset time
1...30 min.
3 min.
E = 14
Controller gain
1...30%/K
3 %/K
F = 15
(not used)
* Only for layered domestic hot water storage tank operation
}
M 1
Programming switch
Service switch
Push and turn knob
10878_BDA_DHC23_engl_neu 06.09.1999 13:50 Uhr Seite 21
