Daikin Hubbard GCU2040PXB1, Installation, Commissioning And Maintenance Manual

Page: 99 / 172

50
ENG
pRack PR300T +0300018EN rel. 1.5 - 02.05.2017
G G
0
V
BA
T
CO
M
A
NO
A
1 3 2 4
T x/Rx GND DI
1
S4 S3 S
2
S
1
GND DI
2
V
REF
E V D
evo l ution
2 A T
2 4 V ac
2 3 0 V ac
35 V A
T RADRFE 2 4 0
G
G
0
V
BA
T
U l tracap T echno l ogy
E V D + pRack pR3 00 T connections:
( d e d icate d )
Fig. 6.au
•
via a EVD EVO external driver (fi g. 2.g) or integrated in PRK30TD***
models, in both cases using fi eldbus serial.
E V D + pRack pR3 00 T connections: via fil e d bus
shie l d
G
G
0
V
BA
T
CO
M
A
NO
A
1 3 2 4
T x/Rx GND DI
1
S4 S3 S
2
S
1
GND DI
2
V
REF
2 A T
2 4 V ac 2 3 0 V ac
35 V A
T RADRFE 2 4 0
U l tracap T echno l ogy
( d e d icate d )
G
G
0
V
BA
T
3
J 2 6 FBus 2
Fig. 6.av
6.16.2 Unit of measure
pRack PR300T can manage two units of measure, the international
system and Imperial.
Note: the temperature and pressure units of measure can be
changed from °C, barg to °F, psig only during start-up; mixed
confi gurations are not allowed, for example °F and barg.
6.16.3 Sign of life
pRack PR300T can manage a digital output acting as a sign of life,
activated when pRack PR300T is powered up. This output remains active
while the controller is working correctly and highlights any hardware
faults. The Signal can be confi gured in main menu branch B.a.c.
6.16.4 Liquid non-return
pRack PR300T can manage a digital output with the meaning of liquid
non-return. This normally active output is deactivated when all the
compressors are off and no compressor can be started due to alarms or
time settings, despite the control request, or when the unit is OFF. As soon
as at least one compressor is enabled to start, the output is deactivated,
allowing management of a liquid non-return valve. The function can be
confi gured in main menu branch C.a.g/C.b.g.
6.16.5 Parallel compressor
pRack pR300T can enable a line of compressors in parallel to the medium
temperature suction line upstream of the RPRV valve using a dedicated
board, and starting from version 3.3.0 this board can be enabled via
pLAN. If managing a single parallel compressor (again starting from
version 3.3.0), the main control board can be used, i.e. without requiring
a dedicated board.
E 2 V
E 2 V
HR1
E 2 V
E 2 V
HR2
E 2 V
E 2 V
HR1
E 2 V
E 2 V
HR2
FLASH
AUX
COMP
RECEIVER
HPV
Fig. 6.aw
This function is confi gured in branch COMPRESSORS
Æ
c.Parallel
compress.
Compressors 3/3
-
-
-
a. Line 1
b. Line 2
c. Parallel compression
If the parallel compressor line is managed using an additional board (via
pLAN or connected via DI/DO):
Parallel Compr. Cca01
Enable parallel
compressor: YES
Control mode:
EXTERNAL PLAN
Parallel Compr. Cca01
Enable parallel
compressor: YES
Control mode:
EXTERNAL I/O
in both cases, the board follows the confi guration and relative restrictions
described in the paragraphs on control 6.3 and compressors 6.4.
Page 99 of 172
Copyright HPL March 2021 P4114S Rev 03