Daikin Hubbard GCU2040PXB1, Инструкция по установке, пусконаладке и обслуживанию

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4 2
ENG
pRack PR300T +0300018EN rel. 1.5 - 02.05.2017
6.6.9 Summary of inputs, outputs and HPV valve par.
The following is a summary table of the inputs/outputs used and the
parameters with indications of the related confi guration screens. For
details, refer to Appendix A.1.
Summary of inputs/outputs and HP
V valve parameters
Mas k Description
Analog inputs Bab04, Daa39 Gas cooler pressure
Bab61, Daa43 Gas cooler output temperature
Bab09, Daa40 Gas cooler backup pressure
Bab62, Daa44 Gas cooler output backup temperature
Digital inputs Baade, Eia04 HPV valve alarm
Analog outputs Bad14, Eia06 HPV valve output
Digital outputs --- ---
Parameters
Settings Eib01 HPV valve management enabled, or transcritical
operation mode enabled
Selecting the type of algorithm to apply to the
calculation of the pressure setpoint
Zone
defi nition Eib05 P
100%
upper pressure limit
P
max
pressure for defi ning the upper proportional zone
P
critic
optimal pressure calculated at the passage
temperature between the intermediate zone and
transcritical zone
T
12
temperature limit between the transcritical zone and
intermediate zone
T
23
temperature limit between the intermediate zone
and subcritical zone
T
min
temperature for defi ning the lower proportional
zone
Eib06 T
100%
temperature for defi ning the complete opening
zone of the valve
Subcooling delta for optimized regulation
Coeffi
cient for determining the customized line
Regulation Eib07 Proportional gain for the propor integral
regulation of the HPV valve
Integral time for the propor integral regulation
of the HPV valve
Proportional gain for the propor integral
regulation of the HPV valve with heat recovery
Integral time for the propor integral regulation of
the HPV valve with heat recovery
Eib16 Enabling the regulation of the gas cooler in the
subcritical zone
Safeties Eib02 Min. opening of the HPV valve with the unit OFF
Min. opening of the HPV valve with the unit ON
Eib03 Opening of the HPV valve at start-up during pre-
positioning
Pre-positioning duration
Eib08 Enabling of the fi lter action on the HPV valve setpoint
Number of samples
Eib09 Enabling of diff erent management of the HPV valve
during heat recovery activation
Setpoint regulation of the HPV valve during heat
recovery
Time scale for the setpoint reset procedure after heat
recovery
Pressure scale for the setpoint reset procedure after heat
recovery
Eib10 HPV valve safety position
Eib11 Off set to be applied to the external temperature in the
event of gas cooler temperature probe error
Safeties Eib12 HPV valve safety procedure enabling
Eib13 Receiver high pressure threshold
Maximum allowed receiver pressure
Maximum off set to add to the HPV setpoint when the
receiver pressure exceeds the high pressure threshold
Eib14 Receiver low pressure threshold
Minimum allowed receiver pressure
Maximum off set to subtract from the HPV setpoint
when the receiver pressure goes below the low pressure
threshold
Eib15 Enable HPV valve closure when all compressors on line
1 are off
Delay HPV valve closure when all compressors on line
1 are off
Eib17 Enable warning function when the gas cooler pressure is
too far from the setpoint for the set time
Diff erence between the gas cooler pressure and the
setpoint which generates the warning
Delay time before generating the warning
Eib32 Maximum opening of the HPV valve
Maximum variation per second allowed for the HPV
valve output
Eib28 Minimum HPV valve regulation setpoint
Enable low temp. control (lower proportional zone)
6.7 RPRV valve management
Management of the RPRV valve, which is a PI regulation, is to maintain the
pressure inside the CO
2
receiver equal to the setpoint. The RPRV valve can
be managed directly by pRack pR300T with built-in driver (PRK30TD***)
or with external EVD EVO driver. Both solutions are compatible with
the majority of valves available on the market. Direct control via serial
connection is enabled under EEVS (electronic expansion valve settings),
accessible from the main menu, branch E.i.c. The confi guration parameters,
on the other hand, are accessible from the main menu, branch E.i.
6.7.1 RPRV valve accessory functions
RPRV valve management includes some accessory functions:
• Pre-positioning : entering the unit ON status, the RPRV valve remains
at a fi xed position that can be set by a parameter for a fi xed time, also
settable by a parameter, in order to be able to quickly raise the pressure
in the tank. This procedure is reactivated whenever the unit goes into
the OFF status or the RPRV valve moves into the minimum position
due to all of the compressors being turned off (optional).
• V alve closure with compressors off : if all compressors in the medium
temperature unit are turned off , the RPRV valve can be positioned
at the minimum opening value in the OFF status, which can be set
by a parameter. When a compressor is restarted, the valve restarts
the regulation with the pre-positioning procedure described in the
previous point.
• Minimum and maximum opening values : the minimum opening
value in Off status and in ON status can be diff erentiated (by keypad,
digital input or supervisor) while the maximum opening value is
unique.
• Maximum percentage variation : the movement of the valve cannot
exceed the maximum set percentage variation per second.
• Maximum receiver pressure : a maximum value can be set for
the receiver pressure, above which an alarm is triggered and unit
operation can be blocked. The block is optional and can be enabled
by a parameter.
6.7.2 Summary of inputs, outputs and RPRV valve
parameters
The following is a summary table of the inputs/outputs used and the
parameters with indications of the related confi guration screens. For
details, refer to Chapter 6 and Appendix A.1.
Summary of inputs/outputs and RPR V valve parameters
Mas k Description
Analog inputs Bab66, Eia01 RPRV receiver pressure probe
Digital inputs Baadf, Eia05 RPRV valve alarm
Analog outputs Bad15, Eia07 RPRV valve output
Digital outputs --- ---
Parameters
Settings Eib18 Enable RPRV valve management
Regulation Eib22
Regulation setpoint for the CO2 receiver
pressure
Proportional gain for the propor integral
regulation of the RPRV valve
Integral time for the propor integral
regulation of the RPRV valve
Safeties
Eib19
Minimum opening of the RPRV valve with the
unit OFF
Minimum opening of the RPRV valve with the
unit ON
Eib20
Opening of the RPRV valve at start-up during
pre-positioning
Pre-positioning duration
Eib21
Maximum opening of the RPRV valve
Maximum variation per second allowed for the
RPRV valve output
Eib23 HPV valve safety position
Eib24
Enable RPRV valve closure when all compressors
on line 1 are off
RPRV valve closure delay when all compressors
on line 1 are off
Eib25
Receiver high pressure threshold alarm
Receiver high pressure diff erential alarm
Receiver high pressure alarm delay
Receiver high pressure alarm reset type
Enable compressor shutoff with receiver high
pressure alarm
Tab. 6.d
Page 91 of 172
Copyright HPL March 2021 P4114S Rev 03