Adjusting The Superheat Controller - Siemens PolyCool Superheat CPS 40 Manuel D'installation Et D'utilisation

Siemens
Building Technologies

5.6 Adjusting the superheat controller

If the system wiring and all peripherals are okay, the plant can be
switched on. The default parameters for superheat control (XP,
TN and D) can be optimised as follows:
MA
MA
Start of plant
a) After switching on the plant, wait until the steady state
condition has been reached which requires two to five
minutes. The drawing above shows the possible graph of
the superheat during the start-up transient condition.
b) Determine the maximum deviation (MA) from the setpoint
T SP. Use display of superheating in regulation operation
mode for this.
c) Increase XP (e.g. double) or decrease XP (e.g. by half).
d) After changing XP, wait for at least two cycles and then re-
determine the deviation. The change in MA determines
further adjustments. Please read the table below.
e) Once you have determined the optimal value for XP, it
probably will not need any further changes.
f) Repeat steps c) to e) with TN in the place of XP.
g) Repeat steps c) to e) with D in the place of XP.
CPS40
T SP
Cycle time
CE1U3372XX / H 74 319 0555 0 d
Time
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2013-10-01