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2.7.1 Overview of EXP parameters
Line
Function
EXP general
180
General frost protection for the plant
0
Inactive
1
Active
Oil- / gas-fired boiler EXP
250
Minimum limitation of the boiler temperature setpoint
EXP (TKmin
)
EXP
251
Maximum limitation of the boiler temperature setpoint
(TKmax)
252
Switching differential of the boiler temperature (SDK)
253
Min. limitation of the burner running time
254
Release integral of burner stage 2
255
Reset integral 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
Acting on the consumers and on the boiler pump
2
Acting on the consumers
3
Acting on the boiler pump
261
control of the boiler pump
0
According to temperature demand
1
Parallel to burner operation
Minimum limitation of the return temperature
280
Minimum limitation of the boiler return temperature EXP
281
Maintained boiler return temperature with effect on the
consumers (locking signal)
0
With no effect on the consumers
1
With effect on the consumers
283
Switching differential of the bypass pump (SDBP)
284
Control of the bypass pump
0
Parallel to burner operation
1
According to the boiler return temperature
285
P-band minimum limitation of the return temperature oil /
gas (Xp)
286
Integral action time minimum limitation of the return
temperature oil / gas (Tn)
287
Actuator running time minimum limitation of the return
temperature oil / gas
Solar plant EXP
300
Maximum temperature collector 1
---
Overtemperature protection OFF
301
Maximum temperature collector 2
---
Overtemperature protection OFF
302
Hysteresis for maximum limitation of the collector tem-
perature
303
Frost protection temperature collectors 1 + 2
---
Frost protection OFF
304
Maximum storage tank charging time
305
Maximum waiting time
307
Changeover / startup delay bypass valve / charging
pump K9
50/348
Siemens Building Technologies
HVAC Products
Basic Documentation RVP540 / RVP550
Handling
Range
Unit
0 / 1
–
8...95
°C
8...120
°C
0...20
K
0...10
min
0...500
K*min
0...500
K*min
0...20
min
0...2
–
0...3
–
0 / 1
–
8...line 252
°C
0 / 1
–
0...20
K
0...2
–
1...100
K
10...873
s
30...873
s
20...350
°C
20...350
°C
1...20
°C
-20...5
°C
1...60
min
1...40
min
1...15
min
Resolution
Factory
setting
1
1
1
40
1
80
1
8
1
4
1
50
1
10
1
5
1
1
1
1
1
0
1
8
1
1
1
6
1
0
1
24
1
90
1
120
1
120
1
120
1
5
1
- - -
1
20
1
5
1
3
CE1P2488en
18.10.2002
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