Applied Thermal Control Ltd
39 Hayhill Industrial Estate
Barrow-upon-Soar, Loughborough
LE12 8LD, United Kingdom
+44 (0) 1530 839 998
[email protected]
[email protected]
Operating Manual; Controller Operation
Annex E-1
DOCUMENT DETAILS
Date 5/DEC/2019
Author(s) MJH
Page 7 / 9
Revision 1
Compressor Settings
This variable speed compressor has been carefully set up by
ATC to work within manufacturer’s limits.
1. Return to
‘Factory Settings’
main menu.
2. Compressor minimum frequency (40Hz is 20% duty).
3. Compressor maximum frequency (200Hz is 100% duty).
4. When a compressor error occurs, the compressor times out
for 60s. This is enforced by compressor control PCB.
5. Frequency issued to instruct the compressor to stop.
Fan Settings
Fan performance is closely linked to overall refrigeration
system health. ATC caution users against making changes.
1. Return to
‘Factory Settings’
main menu.
2. To avoid stalling, the minimum duty default is 17%.
3. To ensure proportional control, the max duty is 45%.
4. Speed offset by fixed value above algorithm requirement.
5. Pulsed control frequency. Set to suit specific fan.
6. Switch between manual and automatic control.
7. Inrush current prevention, if compressor starts at same time.
Calibration (Temperature & Pressure)
In the unlikely event your chiller requires a replacement PT100
or pressure sensor, the previous calibration value(s) may no
longer be valid.
1. Return to
‘Factory Settings’
main menu.
2. Used by the factory to set difference between actual outlet
temperature and that seen by the PT100 probe, in order to
display real temperature.
3. Allows the factory to set pressure offset between
measurement taken from calibrated gauge and that seen by
pressure transducer.
Setpoint Defaults
1. Return to
‘Factory Settings’
main menu.
2. If unit is switched off and
on again, with ‘Enable Default’ (2)
active, the default setpoint overrides the last manual setpoint.
3. After power cycling, a default setpoint can be enforced to
prevent chiller moving back to a previous unwanted setpoint.
4. Minimum settable temperature by user.
5. If power is cut when chiller is running
(past ‘process start’),
the restoration of power reverts the operating state to that
before the cut.
6. Maximum settable temperature by user.
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Annex E-1 200707 XTD controller XTD043RB-K620G&F (Mini at SW v39.4)
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