Pressure Independent Valve Kits
for Liebert® CRV Chilled Water
Units
User Manual
CRV CRC30 and CRC60 Units
Proprietary and Confidential ©2023 Vertiv Group Corp.
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Vertiv™ EPIV Kits for Liebert® CRV CW Units User Manual
TABLE OF CONTENTS
1 Product Overview 1
1.1 Electronic Pressure Independent Valve (EPIV) overview 1
1.2 EPIV Kits Selection 1
2 Mechanical Installation 3
2.1 Installation Specification of EPIV 3
2.2 Installation Specification of CRV CW Units 4
2.3 Mechanical Installation 7
2.4 Standard Valves Adjustment of CRV CW Units 7
3 Electrical Installation 9
3.1 CRV CRC30 Unit 9
3.2 CRV CRC60 Unit 11
4 HMI Setting 13
Appendices 14
Appendix A: Minimum Pressure Drop Calculation for EPIV 14
Appendix B: Technical Support and Contacts 15
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Vertiv™ EPIV Kits for Liebert® CRV CW Units User Manual
1 Product Overview
1.1 Electronic Pressure Independent Valve (EPIV) overview
The EPIV (Electronic Pressure Independent Valve) is an optional kit for Vertiv™ CRV Chilled Water Units that automatically
balances pressure changes and fluctuations in the water system to maintain a constant water flow output.
CRV CW units are from the factory equipped with a standard field adjustable 3-way/2-way chilled water flow control valve with
an actuator. If the installation requires a pressure independent control valve, Vertiv offers a field installed EPIV kit which can
be installed outside of the unit on the chilled water piping. This manual describes the installation of these kits.
Vertiv™ Liebert CRV CW units utilize BEMILO EP..R2+BAC series EPIV. The main technical specifications are as follows.
Table 1.1 Technical Specifications
Part Number EPYV Model DN, nm Rp," G," V'nom, L/s V'nom, m3/h kvs theor*, m3/h
PICVCRKIT-32 EP032R2+BAC 32 1 1/4 1 1/2 1.67 6 11.4
PICVCRKIT-40 EP040R2+BAC 40 1 1/2 2 2.78 10 17.1
PICVCRKIT-50 EP050R2+BAC 50 2 2 1/2 4.17 15 25
NOTE: Kvs theor.: Theoretical kvs value for pressure drop calculation.
1.2 EPIV Kits Selection
It is important to select the right EPIV valve size for your installation. The size of the EPIV valve depends on the water flow
through your Liebert CRV unit. When selecting your EPIV kit, please make sure that the water flow rate of your installed CRV
is within the maximum limits of the valve kit.
The default setting maximum flow rate V'max for the EPIV is equal to V'nom. If you install a Liebert CRV unit with a maximum
water flow rate less than V'nom of the EPIV, then you can reset V'max to the maximum flow rate you need.
The EPIV maximum flow rate is settable from 25% to 100% of V'nom. the table below provides the maximum range of flow rate
that can be set for each valve size.
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Vertiv™ EPIV Kits for Liebert® CRV CW Units User Manual
Table 1.2 The maximum range of flow limits of the EPIV
Part Number EPIV Model Minimum settable V'max, L/s Maximum settable V'max, L/s
PICVCRKIT-32 EP032R2+BAC 0.42 1.67
PICVCRKIT-40 EP040R2+BAC 0.70 2.78
PICVCRKIT-50 EP050R2+BAC 1.04 4.17
NOTE: The V'max of the EPIV cannot be set by the HMI of the CRV unit, it must be set by Belimo Assistant App or
other Belimo tools. For the more details about the Belimo EPIV, please contact Vertiv support.
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Vertiv™ EPIV Kits for Liebert® CRV CW Units User Manual
2 Mechanical Installation
2.1 Installation Specification of EPIV
Recommendations for the installation requirements of the EPIV are as follows.
•Flow direction. The direction of flow, specified by an arrow on the housing, is to be complied with, since otherwise the flow
rate will be measured incorrectly.
•Installation direction. The ball valve can be installed upright to horizontal. The ball valve may not be installed in a hanging
position, i.e. with the spindle pointing downwards.
Figure 2.1 Installation direction of the EPIV
•Inlet section. In order to achieve the specified measuring accuracy, a flow-calming section or inflow section in the direction of
the flow is to be provided upstream from the flow sensor. Its dimensions should be at least 5x DN.
Figure 2.2 Inlet section requirement of the EPIV
DN, mm L, min.
32 5x32 mm=160 mm
40 5x40 mm=200 mm
50 5x50 mm=250 mm
• Installation dimension. The EPIV is connected by threaded connectors. Please see the Figure2.3 and Table 2.1 for the
installation dimensions and threaded connector specifications of EPIV.
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Vertiv™ EPIV Kits for Liebert® CRV CW Units User Manual
Figure 2.3 Dimensional drawings of EPIV
Table 2.1 Dimensional parameters of EPIV
EPIV
Model
DN,
mm Rp, " G," L,
mm
L1,
mm
L2,
mm
L3,
mm
B,
mm
H,
mm
X,
mm
Y,
mm
Weight,
kg
EP032R2+BA
C32 1 1/4 11/2 367 267 50 19 90 146 216 80 4.0
EP040R2+BA
C40 1 1/2 2 373 281 46 19 90 146 216 80 4.8
EP050R2+BA
C50 2 2 1/2 390 294 49 22 90 151 221 80 5.2
NOTE: The installation requirements in the instruction that came with the EPIV valve should also be observed.
2.2 Installation Specification of CRV CW Units
The chilled water Liebert CRV units are provided with threaded connections on inlet/outlet pipes. Please see the Table 2.2 for
the threaded connector specifications of CRV CW units.
Table 2.2 Threaded connector specification of CRV CW unit
CRV Model Threaded connector Rp, ” External diameter mm(in.)
CRC30 1 1/4 28 (1 1/8)
CRC60 1 1/2 35 (1 3/8)
Chilled Water connections are as standard provided through the top or bottom of the unit. Choose the appropriate connection
side according to the environment and requirements of the installation site. The location of the chilled water piping
connections are as follows.
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Vertiv™ EPIV Kits for Liebert® CRV CW Units User Manual
• Connection location of CRC30
Figure 2.4 Top connection of CRC30 unit
Item Description Item Description
1 Rear Door 4 Inlet for humidifier connector
2 Chilled water inlet connector 5 Pump drainage connector
3 Chilled water outlet connector
Figure 2.5 Bottom connection of CRC30 unit
Item Description Item Description
1 Rear Door 3 Chilled water outlet connector (for bottom connection)
2 Chilled water inlet connector (for bottom connection) 4 Cover plate on the chilled water inlet and outlet hole
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Vertiv™ EPIV Kits for Liebert® CRV CW Units User Manual
• Connection location of CRC60
Figure 2.6 Top connection of CRC60 unit
Item Description Item Description
1 Rear Door 3 Chilled water inlet connector
2 Pump drainage connector 4 Chilled water outlet connector
Figure 2.7 Bottom connection of CRC60 unit
Item Description Item Description
1 Rear door 3 Chilled water outlet connector (for bottom connection)
2 Chilled water inlet connector (for bottom connection) 4 Cover plate on the chilled water inlet and outlet hole
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Vertiv™ EPIV Kits for Liebert® CRV CW Units User Manual
2.3 Mechanical Installation
The EPIV is recommended to be installed on the outlet side of the CRV CW unit, as close to the unit as possible.
Figure 2.8 Installation location of the EPIV
NOTE: According to the connection thread specifications of the EPIV, the connection thread specifications and copper
pipe specifications of the CRV CW units, select the appropriate threaded fittings, adapters, or reducers for
connection. These accessories are not included with the CW units and EPIV kits. These fittings and reducers will be
provided by installer based on the piping and EPIV used on site.
2.4 Standard Valves Adjustment of CRV CW Units
If the EPIV kit is selected and installed in the CRV CW unit, the three-way valve and manual shut-off valve that comes
standard with the CW unit will need to be adjusted.
lCheck and confirm that the manual shut-off valve is fully closed. The manual shut-off valve is closed when the handle
is perpendicular to the piping line. If the manual shut-off valve is open, rotate the handle in clockwise direction to the
closed position. Please see the figure 2.9 for the location of the manual shut-off valve.
lCheck and confirm that the electric three-way valve is fully open. The three-way valve is open when the handle is
parallel to the piping line. If the electric three-way valve is closed, press the button and rotate the handle in
counterclockwise direction to the open position. Please see the figure 2.9 for the location of the electric three-way
valve.
NOTE: Manual operation of the handle of the electric three-way valve must be evenly and slowly, and make sure it
takes more than 10s to switch the whole process, otherwise it will be possible to damage the actuator.
NOTE: Do not supply power to the electric three-way valve after the valve is opened manually, otherwise the valve
may be reset to the closed state.
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Vertiv™ EPIV Kits for Liebert® CRV CW Units User Manual
Figure 2.9 Location of Electric Three-way Valve and Manual Shut-off Valve
Item Description Item Description
a CRC30 2 Button
b CRC60 3 Manual shut-off valve (in the open position)
1 Electric three-way valve (in the open position)
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3 Electrical Installation
After the mechanical installation, the wiring connections of the original three-way valve and flowmeter need to be removed,
and then the wirings of the new EPIV valve need to be connected. This chapter describes the wiring procedure for the new
EPIV valves and CRV CW units.
3.1 CRV CRC30 Unit
Ensure that the unit is powered off. Open the rear door and remove the air filters, follow the cables of the electric three-way
valve and flowmeter, and find their respective white butt terminals. Unplug the butt terminals of the electric three-way valve
and flowmeter to disable the standard valve and flowmeter.
NOTE: Please take care to mark and protect these disconnected terminals to avoid confusion or misuse by others
during maintenance.
Pull out the main electrical box and remove the cover, the layout of electrical box is shown in Figure 3.1. Remove the original
electric three-way valve connector J15 and flowmeter connector J24 from the iCOM Edge Controller, the position of the J15
and J24 connectors is shown in figure 3.2.
Figure 3.1 Electrical Box of CRC30 unit
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Vertiv™ EPIV Kits for Liebert® CRV CW Units User Manual
Figure 3.2 iCOM Edge Controller
Using the attached new cables, connect the new EPIV valve wirings. Connect the J15 and J24 connectors of the attached
cable to the corresponding iCOM Edge Controller ports, then plug the other end of the cable into the connector of the EPIV
cable.
According to the marking of the terminal block, connect the G1&241 of the attached cable to the reserved terminals (G1, 241)
of the terminal block to ensure 24V power supply to the EPIV valve. The terminal block of CRC30 unit is shown in figure 3.3.
Figure 3.3 Terminal Block of CRC30 Unit
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3.2 CRV CRC60 Unit
Ensure that the unit is powered off. Open the rear door and remove the air filters, follow the cables of the electric three-way
valve and flowmeter, and find their respective white butt terminals. Unplug the butt terminals of the electric three-way valve
and flowmeter to disable the standard valve and flowmeter.
NOTE: Please take care to mark and protect these disconnected terminals to avoid confusion or misuse by others
during maintenance.
Pull out the main electrical box and remove the cover, the layout of electrical box is shown in Figure 3.4. Remove the original
electric three-way valve connector J15 and flowmeter connector J24 from the iCOM Edge Controller, the position of the J15
and J24 connectors is shown in figure 3.2.
Figure 3.4 Electrical Box of CRC60 unit
Using the attached new cables, connect the new EPIV valve wirings. Connect the J15 and J24 connectors of the attached
cable to the corresponding iCOM Edge Controller ports, then plug the other end of the cable into the connector of the EPIV
cable.
According to the marking of the terminal block, connect the G1&241 of the attached cable to the reserved terminals (GND,
24V) of the terminal block to ensure 24V power supply to the EPIV valve. The terminal block of CRC60 unit is shown in figure
3.5.
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Vertiv™ EPIV Kits for Liebert® CRV CW Units User Manual
Figure 3.5 Terminal Block of CRC60 Unit
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Vertiv™ EPIV Kits for Liebert® CRV CW Units User Manual
4 HMI Setting
After all the EPIV kit installation, the water flow high limit needs to be reset on the HMI. After the device is powered on, enter
the third-level password to access the HMI and to set it.
lReset the flow high limit on the HMI. Touch the Main Menu icon, choose Maintenance >> CW valve Settings >> CW
Flow High Limit, enter the new flow high limit based on the rated flow of the installed EPIV kit. Please see the rated
flow are shown in table 1.2 and the default value are shown in the table 4.1.
Table 4 .1 The default value for the water flow upper limit
Parameter Setting Range Default Value
Water flow high limit (L/s) 1-5
CRC30 2.16
CRC60 3.00
NOTE: The purpose of setting the Water Flow High Limit in the HMI is only for the Liebert CRV device to detect a
more accurate flow value, it does not represent the V'max of the EPIV.
NOTE: The V'max of the EPIV cannot be set by the HMI of the CRV unit, it must be set by Belimo Assistant App or
other Belimo tools. For the more details about the Belimo EPIV, please contact Vertiv support.
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Vertiv™ EPIV Kits for Liebert® CRV CW Units User Manual
Appendices
Appendix A: Minimum Pressure Drop Calculation for EPIV
A.1 Minimum differential pressure (pressure drop)
The minimum required differential pressure (pressure drop through the valve) for achieving the desired volumetric flow V'max
can be calculated with the aid of the theoretical Kvs value and the below-mentioned formula. The calculated value is
dependent on the required maximum volumetric flow V'max. Higher differential pressures are compensated for automatically
by the valve
.Formula to calculate minimum pressure drop:
NOTE: Please see table 1.1 in Chapter 1 for the Kvs theor.
A.2 Behavior in case of sensor failure
In case of a flow sensor error, the EPIV will switch from flow control to position control. Once the error disappears, the EPIV will
switch back to the normal control setting.
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Vertiv™ EPIV Kits for Liebert® CRV CW Units User Manual
Appendix B: Technical Support and Contacts
B.1 Technical Support/Service in the United States
Vertiv Group Corporation
24x7 dispatch of technicians for all products.
1-800-543-2378
Liebert® Thermal Management Products
1-800-543-2378
Liebert® Channel Products
1-800-222-5877
Liebert® AC and DC Power Products
1-800-543-2378
B.2 Locations
United States
Vertiv Headquarters
505 N Cleveland Ave
Westerville, OH 43082
Europe
Via Leonardo Da Vinci 8 Zona Industriale Tognana
35028 Piove Di Sacco (PD) Italy
Asia
7/F, Dah Sing Financial Centre
3108 Gloucester Road, Wanchai
Hong Kong
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