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Siemens Building Technologies
Basic Documentation RVP540 / RVP550
CE1P2488en
HVAC Products
Description of the EXP settings
18.10.2002
Oil- / gas-fired boiler EXP
5.2 Minimum limitation of the boiler temperature
setpoint EXP (TKmin
EXP
)
•
Minimum limitation of the boiler temperature setpoint
This function provides minimum limitation of the boiler temperature setpoint.
Setting range
Unit
Factory setting
8…line 270
°C
40
The setting provides minimum limitation of the boiler temperature (Tkmin) which can be
adjusted on operating line 270 .
5.3 Maximum limitation of the boiler temperature
setpoint (TKmax)
•
Maximum limitation of the boiler temperature setpoint.
This function provides maximum limitation of the boiler temperature setpoint.
Setting range
Unit
Factory setting
Line 270... 120
°C 80
This setting provides maximum limitation of the boiler temperature setpoint. The boilers
are operated at a temperature no higher than the adjusted temperature, even if the
consumers call for more heat.
5.4 Switching differential of the boiler
temperature (SDK)
•
Adjustable control accuracy of the boiler temperature
•
Burner's switching frequency is reduced
Boiler temperature control is in the form of a 2-position controller. The burner stages
are switched on and off based on the switching differential of this 2-position controller.
Setting range
Unit
Factory setting
0...20 K
8
The setting changes the switching differential of the boiler temperature control.
Entry:
Increase:
Switching differential will become greater
Fewer burner starts, longer burner running times.
Decrease:
Switching differential will become smaller
More burner starts, shorter burner running times.
Benefit
Description
Setting
Effect
Benefit
Description
Setting
Effect
Benefit
Description
Setting
Effect
