Siemens PolyCool CPS 40, Installation And User Manual

Page: 41 / 124

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:
hea
t
∆ T SP
MA
MA
S
uper
Cycle time
Start of plant
Time
337
1D
0
5e
a)
til the steady state
ve
s. The drawing above shows the possible
b)
∆
T SP. Use display of superheating in
c) .g. by
d
then re-determine the deviation. The change in MA
determines further adjustments. Please read the table
below.
) 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.
After switching on the plant, wait un
condition has been reached which requires two to fi
minute
graph of the superheat during the start-up transient
condition.
Determine the maximum deviation (MA) from the
setpoint
regulation operation mode for this.
Increase XP (e.g. double) or decrease XP (e
half).
d) After changing XP, wait for at least two cycles an
e
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Building Technologies CPS40 CE1U3372XX / H 74 319 0555 0 a
HVAC Products 22.09.2006