Honeywell DHC 23 User Manual

17
DHC 23 SERVICE BY THE HEATING SPECIALIST
■■ Changes of the basic setting
It is possible to adapt important control parameters or functions for service purposes as
well as for adapting to special requirements. Proceed as follows:
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..
Programming switch
Service switch
Push and turn knob
■■ Overview of operating parameters DHC 23-1
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 Overwrite TF 26 status 0,1 0
0 = do not overwrite
1 = overwrite
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 distant -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)
* Valid only for layered domestic hot water storage tank operation
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10878_BDA_DHC23_engl_neu 06.09.1999 13:50 Uhr Seite 19

Honeywell DHC 23 Specifications

General

Brand	Honeywell
Model	DHC 23
Category	Network Router
Language	English