Daikin GCU2040PXB1 [102/177] Subcooling

Daikin GCU2040PXB1 [102/177] Subcooling
46
ENG
pRack PR300T +0300018EN rel. 1.5 - 02.05.2017
Summary of inputs/outputs and oil injection parameters
Mask Description
Analog inputs
Bab62 Oil di erential pressure probe 1 line 1
Bab66 Oil di erential pressure probe 1 line 2
Digital inputs
Eaaa57 Oil level compressor 1 line 1
Eaaa58 Oil level compressor 2 line 1
Eaaa59 Oil level compressor 3 line 1
Eaaa60 Oil level compressor 4 line 1
Eaaa61 Oil level compressor 5 line 1
Eaaa62 Oil level compressor 6 line 1
Eaba17 Oil level compressor 1 line 2
Eaba18 Oil level compressor 2 line 2
Eaba19 Oil level compressor 3 line 2
Eaba20 Oil level compressor 4 line 2
Eaba21 Oil level compressor 5 line 2
Eaba22 Oil level compressor 6 line 2
Analog outputs --- ---
Digital outputs
Eaaa40 Oil level valve compressor 1 line 1
Eaaa41 Oil level valve compressor 2 line 1
Eaaa42 Oil level valve compressor 3 line 1
Eaaa43 Oil level valve compressor 4 line 1
Eaaa44 Oil level valve compressor 5 line 1
Eaaa45 Oil level valve compressor 6 line 1
Eaba40 Oil level valve compressor 1 line 2
Eaba41 Oil level valve compressor 2 line 2
Eaba42 Oil level valve compressor 3 line 2
Eaba43 Oil level valve compressor 4 line 2
Eaba44 Oil level valve compressor 5 line 2
Eaba45 Oil level valve compressor 6 line 2
Parameters
Eaab10
Enable oil level management (line 1)
Number of compressor alarms associated
with the oil level
(line 1)
Eaab11
Oil level valve opening time (line 1)
Oil level valve closing time (line 1)
Delay for oil level valve pulsing at startup
(line 1)
Maximum pulsing time for the oil level
valve (line 1)
Eabb10
Enable oil level management (line 2)
Number of compressor alarms associated
to the oil level
(line 2)
Eabb11
Oil level valve opening time (line 2)
Oil level valve closing time (line 2)
Delay for oil level valve pulsing at startup
(line 2)
Maximum pulsing time for the oil level
valve (line 2)
Tab. 6.f
Summary of inputs/outputs and oil receiver level parameters
Mask Description
Analog inputs
Bab63
Oil separator di erential pressure probe
line 1
Bab65
Oil separator di erential pressure probe
line 2
Digital inputs --- ---
Analog outputs --- ---
Digital outputs
Bac71 Oil separator line 1
Baceo Oil separator line 2
Parameters
Eaab12
Type of oil level separator control: with
minimum level only, with minimum and
maximum level and with compressor
status (line 1)
Minimum separator valve closing time
(line 1)
Minimum oil level detection delay (line 1)
Eaab13
Valve opening time during oil level reset
(line 1)
Valve closing time during oil level reset
(line 1)
Valve opening time with correct oil level
(line 1)
Valve closing time with correct oil level
(line 1)
Eaab15
Oil receiver di erential pressure threshold
(line 1)
Oil receiver di erential pressure (line 1)
Oil receiver di erential pressure delay
(line 1)
Tab. 6.g
6.12 Subcooling
pRack PR300T can control subcooling in two di erent ways:
with the condensing temperature and the liquid temperature
with the liquid temperature only
In the  rst case, subcooling is calculated as the di erence between
the condensing temperature (obtained by converting the condensing
pressure) and the liquid temperature measured after the exchanger.
The corresponding output is activated below a set threshold, with  xed
di erential.
Digital output
Threshold Tcond. - Tliq.
C/°F
Fig. 6.an
In the second case, the output is active for liquid temperature values
greater than a threshold, with  xed di erential.
Threshold Tliq.
C/°F
Digital output
Fig. 6.ao
The subcooling function can be enabled and the related parameters set
in main menu branch E.b.a/E.b.b.
Note: the subcooling function is active when at least one
compressor is on.
Page 102 of 177
Copyright HPL January 2021
P4115S Rev 02

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