Subcooling - Daikin HUBBARD HCU2040PXB1 Installation, Commissioning And Maintenance Manual

ENG
Summary of inputs/outputs and oil injection parameters
Mask
Bab62
Analog inputs
Bab66
Eaaa57
Eaaa58
Eaaa59
Eaaa60
Eaaa61
Eaaa62
Digital inputs
Eaba17
Eaba18
Eaba19
Eaba20
Eaba21
Eaba22
Analog outputs ---
Eaaa40
Eaaa41
Eaaa42
Eaaa43
Eaaa44
Eaaa45
Digital outputs
Eaba40
Eaba41
Eaba42
Eaba43
Eaba44
Eaba45
Eaab10
Eaab11
Parameters
Eabb10
Eabb11
Summary of inputs/outputs and oil receiver level parameters
Mask
Bab63
Analog inputs
Bab65
Digital inputs ---
Analog outputs ---
Bac71
Digital outputs
Baceo
Eaab12
Parameters
Eaab13
Eaab15
Copyright HPL March 2021
pRack PR300T +0300018EN rel. 1.5 - 02.05.2017
Description
Oil diff erential pressure probe 1 line 1
Oil diff erential pressure probe 1 line 2
Oil level compressor 1 line 1
Oil level compressor 2 line 1
Oil level compressor 3 line 1
Oil level compressor 4 line 1
Oil level compressor 5 line 1
Oil level compressor 6 line 1
Oil level compressor 1 line 2
Oil level compressor 2 line 2
Oil level compressor 3 line 2
Oil level compressor 4 line 2
Oil level compressor 5 line 2
Oil level compressor 6 line 2
---
Oil level valve compressor 1 line 1
Oil level valve compressor 2 line 1
Oil level valve compressor 3 line 1
Oil level valve compressor 4 line 1
Oil level valve compressor 5 line 1
Oil level valve compressor 6 line 1
Oil level valve compressor 1 line 2
Oil level valve compressor 2 line 2
Oil level valve compressor 3 line 2
Oil level valve compressor 4 line 2
Oil level valve compressor 5 line 2
Oil level valve compressor 6 line 2
Enable oil level management (line 1)
Number of compressor alarms associated
with the oil level (line 1)
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)
Enable oil level management (line 2)
Number of compressor alarms associated
to the oil level (line 2)
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
Description
Oil separator diff erential pressure probe
line 1
Oil separator diff erential pressure probe
line 2
---
---
Oil separator line 1
Oil separator line 2
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)
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)
Oil receiver diff erential pressure threshold
(line 1)
Oil receiver diff erential pressure (line 1)
Oil receiver diff erential pressure delay
(line 1)
Tab. 6.g

6.12 Subcooling

pRack PR300T can control subcooling in two diff erent ways:
•
with the condensing temperature and the liquid temperature
•
with the liquid temperature only
In the fi rst case, subcooling is calculated as the diff 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 fi xed
diff erential.
Digital output
In the second case, the output is active for liquid temperature values
greater than a threshold, with fi xed diff erential.
Digital output
1°C/°F
Threshold
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.
46
Page 95 of 169
1°C/°F
Threshold Tcond. - Tliq.
Fig. 6.an
Tliq.
Fig. 6.ao
P4367 Rev 01