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Overview of the EXP parameters
Line
Function
General EXP
180
General frost protection
0
Inactive
1
Active
Oil- / gas-fired boiler EXP
250
Minimum limitation of boiler temperature setpoint EXP
(TKminEXP)
251
Max. limitation of the boiler temperature setpoint
252
Switching differential of the boiler temperature
253
Minimum limitation of the burner running time
254
Release limit of burner stage 2
255
Reset limit of burner stage 2
256
Pump overrun time
(after burner OFF)
257
Operating mode of the boiler
0
Continuous operation (without extended burner running time)
1
Automatic operation (without extended burner running time)
2
Automatic operation (with extended burner running time)
259
Protective boiler startup
0
None
1
With effect on the consumers and on the boiler pump
2
With effect on the consumers
3
With effect on the boiler pump
261
Control of the boiler pump
0
According to heat demand
1
Parallel to burner operation
Minimum limitation of the return temperature
280
Minimum limitation of boiler return temperature EXP
281
Maintained boiler return temperature with consumer
influence
0
With no effect on the consumers
1
With effect on the consumers
283
Switching differential of the bypass pump
284
Control of the bypass pump
0
Parallel to burner operation
1
According to the boiler return temperature
285
P-band of minimum limitation of the return temperature
oil / gas (Xp)
286
Integral action time for minimum limitation of the
return temperature oil / gas (Tn)
287
Actuator running time minimum limitation of the return
temperature oil / gas
Solar heating plant EXP
300
Maximum temperature collector 1
---
Overtemperature protection OFF
301
Maximum temperature controller 2
---
Overtemperature protection OFF
302
Hysteresis of maximum limitation of the collector tem-
perature
303
Frost protection temperature collector 1 + 2
---
Frost protection OFF
304
Maximum storage tank charging time
305
Maximum waiting time
307
Changeover / startup delay bypass valve / charging
pump K9
Siemens Building Technologies / HVAC Products
Range
0 / 1
8...95
8...120
(TKmax)
0...20
(SDK)
0...10
0...500
0...500
0...20
0...2
0...3
0 / 1
8...line
252
0 / 1
0...20
(SDBP)
0...2
1...100
10...873
30...873
20...350
20...350
1...20
–20...5
1...60
1...40
1...15
74 319 0312 0 a
Unit
Resolution
–
......
°C
...... °C
°C
...... °C
K
...... K
min
...... min
K*min
......
K*min
K*min
......
K*min
min
...... min
–
......
–
......
–
......
°C
...... °C
–
......
K
...... K
–
......
K
...... K
s
...... s
s
...... s
°C
...... °C
°C
...... °C
°C
...... °C
°C
...... °C
min
...... min
min
...... min
min
...... min
19.08.2002
Factory
setting
1
40
80
8
4
50
10
5
1
1
0
8
1
6
0
24
90
120
120
120
5
- - -
20
5
3
25/28
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