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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the EXP settings
18.10.2002
5.31 Actuator running time minimum limitation of
the return temperature of the wood-fired
boiler
•
Setting the actuator running time
Allows adjustments to be made to supplier-specific actuator running times.
Setting range
Unit
Factory setting
30...873 s
120
The actuator running time is the period of time the actuator requires to travel from one
end position to the other.
Heat pump
5.32 Maximum switch-off temperature
The setting defines the maximum flow temperature permitted for the heat pump.
Setting range
Unit
Factory setting
20...140 °C
55
When the temperature acquired with flow sensor B21 or return sensor B71 exceeds the
maximum switch-off temperature, the compressor will be switched off. The pump will
continue to run for the selected overrun time.
The heat pump will be switched on again when both B21 and B71 have dropped below
the maximum switch-off temperature by the amount of heat pump switching differential
OFF (operating line 421) and the minimum off time has elapsed (operating line 414).
5.33 Minimum switch-on temperature
•
Prevents excessive temperature drops at the selected control sensor
The setting defines the minimum temperature at the selected heat pump control sensor.
Setting range
Unit
Factory setting
--- / 8...95
°C
---
--- Function
deactivated
If the temperature at the selected control sensor (operating line 420) falls below the
value set here, the heat pump will be put into operation – if there is demand for heat.
If return sensor B71 is present, the controller will also check the temperature acquired
by it. If the temperature at that sensor drops below the minimum switch-on temperature,
the controller will continually restrict the amount of heat drawn by the consumers. As
soon as the minimum switch-on temperature at the return sensor is reached again, the
controller will slowly cancel the restriction of heat consumption (mixing valves of the
consumers will slowly open again).
Benefit
Description
Setting
Note
Description
Setting
Effect
Benefit
Description
Setting
Effect
