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Summary of Contents for Vertiv Liebert PWM 30
- Page 1 Liebert PWM 30 ® Frontal Air Delivery Chilled Water Room Cooling Units User Manual English, 10037309MAN_ENG, rev. A.01 - 16.01.2024 This document, written in English, is the original version...
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Page 3: Table Of Contents
5.1. Safety instructions..............25 8.5. Draining the chilled water system..........61 5.2. Assembly of the unit..............25 8.6. Component replacement............62 5.2.1. Coil section preparation..........25 8.6.1. Replacing the control board...........62 5.2.2. Fan module preparation..........27 VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... - Page 4 Instruction Leaflet for Transport and Handling (on the packaging) • PWM Control Application - Manual • Labels with Gravity Center (on the packaging) • Electric Diagrams • Warranty Certificate VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®...
- Page 5 Rated short-time current Minimum room operation temperature Maximum room operation temperature Minimum room operation air humidity Minimum room operation air humidity Maximum hydraulic circuit pressure Net weight Manufacturing date VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®...
- Page 7 Abbreviations - Acronyms Item Definition Automatic Transfer Switch Electronically Commutated [fans] Miniature Circuit Breaker PICV Pressure Independent Control Valve Safe Torque Off Ultracap Ultra capacitor Uninterruptible Power Supply VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®...
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Page 9: Safety
• The manufacturer takes no liability for any improper use of the unit. Do not modify the unit • Do not modify the unit without Vertiv™ permission in any way, including the safety devices, the control system and the software. -
Page 10: Personal Protective Equipment
• The key of the electric panel must be kept by the person responsible for maintenance. • Always wear the protective equipment prescribed by the local and Vertiv™ regulations. • It is forbidden to operate on the electrical components without using insulating platforms, or in the presence of water and humidity. -
Page 11: Purpose Of The Unit
The coil section and fan module are delivered separately and need to be connected at the installation site. • Base frame and intake plenum are delivered separately, in disassembled state and need to be assembled and connected at the installation site. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 12: Heat Transfer Fluid
Do not assemble or connect the unit with systems or machines that are different from what is specified in this manual for your unit. Contact Vertiv™ Technical Support for any question. 1.7 Heat transfer fluid The heat transfer fluid is chilled water or mixture water + glycol supplied by an external system. -
Page 13: Unit Description
ATS module inside the unit. Proper tool is required to unlock the latches and open the door. Shut-off switch The shut-off switch is located on the front door in lower-right area of the unit. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 14: Internal Components
CW Pressure independent The unit is equipped with a pair of PIC valves. For details regarding the actuator replacing, control valve assembly see chapter 8.6.4 Replacing the valve actuator. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 15: Air Distribution
The control system operates the opening and closing of the water valve [C] at the water outlet in order to control the water flow rate to maintain desired operating conditions. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024... -
Page 16: Water Valve Type
Maximum water pressure 16 Bar Water-Glycol mixture Up to 50% vol. Voltage ± 10% Power supply tolerance ± 0,5 Hz continuously Frequency (EN 60204-1:2018) ± 1,0 Hz short time VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 17: Dimensions And Weights
NOTICE Vertiv™ is not responsible for an improper use of the unit, such as an application outside the specified limits in this chapter. Working outside the specified limits might cause breaks and damages to compromise the unit operation. 2.7. Dimensions and weights 2.7.1. -
Page 18: Optional Accessory Height
Base frame and intake plenum are delivered separately, in disassembled state and need to be assembled and connected at the installation site 2.7.3. Weights PWM unit weight [kg] Coil section 1040 Fan module Filter module Total unit weight 1705 Weight of optional accessories [kg] Base frame Damper VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 19: Center Of Gravity
NOTE: Depending on the electric system configuration, the unit may be set to remain switched OFF for a certain time. What happens when power is restored: The ATS remains on the second power supply until the main power supply is restored. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 20: Main Components
• Open all the local and remote disconnecting switches of the unit. • Wait at least 5 minutes. • Verify with a voltmeter that the power is OFF. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 21: Dual Alternate Power Supply
2.8.6. Ethernet connection RJ11 - CANbus port for connection of an external display RJ45 - Ethernet port for connection of an external laptop VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 22: Protective Functions
Optional sensors T or T+H (up to 3) Energy meter Remote sensors T or T+H (up to 10) Expansion board Differential pressure transducer NOTE: “T” = temperature sensor; “H” = humidity sensor VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 23: Settings
No Teamwork Mode: • The fan will run at defined speed. If a higher call for fan speed occurs, the fan will operate at the higher call. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 25: Technical Data
DP1 is the unit water pressure drop for the new volumetric mixture flow rate. 3.2 Air system Fan number and weight Unit Fan alternative Number of fans Individual fan weight 29,1 kg PWM 30 Delta 31,5 kg VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 26: Electrical System
Do not run the Modbus cable in the same conduit, raceway or chase used for high-voltage wiring. Mandatory shield connection to ground close Master (indoor unit control board) For Modbus network lengths greater than 130 m, contact Vertiv™ for assistance. Electrical data for units with power supply 400V / 3ph +N / 50Hz + Earth High power fan module Min./max. -
Page 27: Handling
• If any parts are found missing or damaged, please report to the carrier immediately. • If you find any damage, please report to the carrier and to the local distributor too. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024... -
Page 28: Transport With Packaging
• Fix the slings to the spreader bar [C] NOTICE Lift the unit with a speed suitable for the load to be moved, so as not to damage the structure. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 29: Unpacking
• Fix the piano jacks to the unit by straps, placing a protective material between the unit and the straps. • Lift slightly the forks of the piano jacks and remove the pallet. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 30: Using A Crane
• Insert a sling or a chain in each of the eyebolts. • Fix the slings or chains to a 4-points lifting bar [B]. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... - Page 31 • Move the unit to its installation site. NOTICE Lift the unit with a speed suitable for the load to be moved, so as not to damage the structure. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®...
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Page 33: Assembly And Positioning
• Bring the coil section close to the final location. • In case of optional base frame accessory, remove the skid accordingo to following procedure and then see Liebert ® PWM – Base frame – Mounting instructions VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... - Page 34 • By a crane or bridge crane slightly lift the unit and remove the skid. NOTICE Lift the unit with speed suitable for the load to avoid damage to the structure. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®...
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Page 35: Fan Module Preparation
• Remove the four bolts (two at each side) that fix the fan module to the skid. • By a crane or bridge crane slightly lift the fan module and remove the skid. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 36: Fan Module Attachment
• Place the cover provided with the unit to protect the connections. • Fix the cover to the frame by screws. See chapter 6.5. Electrical connections for details. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... - Page 37 If the unit is equipped with condensate drain connection at the bottom of the cabinet, please, refer to chapter 6.4.5 Condensate drain connection before applying the rear gasket and positioning of the unit. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®...
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Page 38: Positioning Of The Unit At The Final Location
• Prepare the plenum with filters and bring the module close to the final location. • Turn the module to have the rubber gromets [A] on the right side when standing in front of the module. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... - Page 39 • Remove both frontal and both rear panels from the filter module • Pull the signal cable from the damper actuator [A], through the grommet in the cover [B] and connect it into the electric box [C]. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®...
- Page 40 • Remove the four bolts (two at each side) that fix the filter module to the skid. • By a crane or bridge crane slightly lift the fan module and remove the skid. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®...
- Page 41 • Connect the cable from the electric box inside the filter module to the main electric panel in the coil section. • Remove the eyebolts and re-attach all the missing panels to the filter and fan sections. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®...
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Page 42: Chilled Water Piping Arrangement - Top Connection
The condensate drain piping is connected inside of the cabinet and leads into single outlet [A] at the bottom of the coil section underneath the unit. For more details see chapter 6.4.5 Condensate drain connection VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 43: Installation
6.2 Overview 6.2.1. Preparation of the installation site (by the customer) NOTICE Vertiv™ takes no responsibility for systems not compliant with the specifications given in this manual. Lack of compliance to the specifications given by Vertiv™ voids the warranty. Operation See... -
Page 44: Specification For Site Preparation
Groove width +0,8 / -0 mm 7,62 7,62 Groove diameter +0 / -0,5 mm 51,50 61,46 Groove depth ref. only 1,25 1,27 Max allowed flare diameter 56,41 66,41 VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 45: Condensate Piping Requirements
The guarantee becomes invalid if you do not respect the diameters Diameter and thickness given in this manual. If you need to use piping with a larger diameter (for example for long winding runs), please contact Vertiv™ Technical Support. Thermal insulation Wrap the piping by thermal insulating material. Piping layout Prepare the external piping as following: •... -
Page 46: Water Supply Requirements
< 0,5 on copper, these values must be considered as guidelines to < 0,05 avoid corrosion. < 50 < 50 Temperature °C < 65 Oxygen content < 0,1 VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 47: Electric System Requirements
(Wye) with earthed neutral (TN or TT system). If you need three-phase distribution Delta-connected (Δ) or Star-connected power (Wye) without ground or floating ground (IT) please contact Vertiv™ Technical Support. Power supply connection VERTIV™... - Page 48 Make sure that all electrical components are undamaged. • The cables must not touch hot surfaces. If necessary, wrap the electrical Hot surfaces cables by a thermal insulating sheath. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®...
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Page 49: Piping Connections
Standard packaging contains clamps [B] and stub pipes [C] for brazed or threaded connection. The clamps and stub pipes are removed and stored inside of the cabinet during the transport. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... - Page 50 Remove the precuts from all 4 covering plates. To avoid tearing up the pipe insulation, smoothen the edge and remove any burrs. Cover the pipes and clamps with insulation. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®...
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Page 51: Joining Pipes With The Grooved Connection
Slide the gasket into position, and make sure that it is centered between the grooves [B]. NOTICE Make sure that no portion of the gasket extends into the grooves. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... - Page 52 This is necessary to ensure a rigid joint. • Visually inspect the bolt pads at each joint to ensure metal to-metal contact is achieved. • Cover the connection with insulation. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®...
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Page 53: Chilled Water Connection To The External Source
[A] at the bottom of the coil section. 6.4.5.1.Condensate drain outlet preparation • Turn the cut-off switch into “OFF” position and open the frontal door. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 54: Condensate Pump Connection
The system/line cable protection is to be arranged by the customer. • Use a protection with differential switch. • For details about the cable entrance holes see Annex C - Connections. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 55: Power Supply Connection
ATS box and connect it into the ATS module. • Re-attach the electrical panel cover and fix it properly with screws. NOTICE Make sure not to damage the electrical cable between the panels and the unit. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 56: Contacts For The Unit Status Signals
Use appropriate cable ties to fix the cable to the frame in the fan module. • Restore the original protection degree with suitable accessories for the wiring and junction boxes. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 57: Sensor Connections
The sensor has been already installed in the unit and it’s fixed in the fan module with at least 3m of cable length available. Remove the stripe and place it according the drawing. NOTE: To grant a proper unit regulation, install the sensor according the drawing. Vertiv™ is not responsible in case of improper installation. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024... -
Page 58: Modbus Connections And Settings
Optional sensors T or T+H (up to 3) Energy meter Remote sensors T or T+H (up to 10) Expansion board Differential pressure transducer NOTE: T - Temperature sensor H - Humidity sensor VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 59: Filling The Water System
The unit is provided with the following drain valves: • [C1] Drain valve on water inlet piping • [C2] Drain valve on water outlet piping (2x) VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 60: Adding Ethylene Glycol
Check the head and the flow rate of the circulation pump (building facility) to be used, since the hydraulic features of the system changes by adding glycol (see chapter 3.1. Water system - Glycol mixture correction factors). VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 61: Final Checks
Make sure that all the safeguards (panels, grids) have been re-attached. Safeguards • Close and lock all the doors. Everything OK? • Start the normal operation, see chapter 7. Operation VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 63: Operation
PDX-PCW Control Application for details. If the LED does not light up, see chapter 9. Troubleshooting CAUTION The fan starts immediately (the fan always works when the unit is ON). VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 64: Check The Operation
Teamwork Mode 2 (Independent) - The control drives cooling, heating, ventilation, humidification and dehumidification based on local requests, while avoiding operational conflict with the other units in the network. Teamwork Mode 3 (Smart Aisle™) VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 65: Maintenance
All the tasks that are explained in this chapter must be carried out only by authorized and trained technicians. We recommend the Vertiv™ Customer Service. For any operation that is not specifically mentioned in this manual you must contact Vertiv™ Technical Support. Read carefully the chapter Safety. -
Page 66: Removing The Front Access Panels
Open all the local and remote disconnecting switches of the unit. • Wait at least 5 minutes. • Verify with a voltmeter that the power is OFF. Refer to the Electric Diagrams provided with the unit VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 67: Water System
Check that the water valve operates correctly. • Check the temperature and the pressure of the water on the inlet and outlet • side using thermometers and manometers, if installed. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 68: Air System
The accessory operates as required? (optional) Temperature • 8.7 Calibrations safety switch Condensate tank • Visual inspection for dirtiness, damage, corrosion (optional) Clean if necessary. (*) Check more frequently in dusty environment. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 69: Draining The Chilled Water System
[B1] Drain valve on water inlet piping [B2] 2x Drain valve on water outlet piping The unit is provided with the following vent valve: [C1] Vent valve on chilled water heat exchanger VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 70: Component Replacement
• After reassembling, connect the fan to a laptop and use the configuration Modbus address software provided by the manufacturer to set the fan Modbus address (see 6.6.2 and the for details.) Setting of Modbus devices PDX-PCW Control Application VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 71: Replacing A Fan
• It might be necessary to slightly lift the fan to avoid contact between the propeller and the bracket. • To reassemble the fan, proceed in reverse order VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 72: Replacing The Valve Actuator
Now you can safely remove the actuator. To install new actuator, it is necessary to set ring to end stop. Then proceed with steps 6 – 1 in this order. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 73: Calibrations
In case of replacement of the clogged filter differential pressure switch, then turn the screw [A] to adjust the setting. Temperature safety Setting: 120°C ± 6°C switch (if heating is Manual reset present VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 75: Troubleshooting
Connect the cables The fans do not run There is no signal Check the Modbus chain The unit is noisy The fan is noisy Check the fan fixing VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 77: Dismantling The Unit
6. If you need to keep the unit in a storehouse for reuse 2.6.1 Storage conditions Handle to authorized disposal company according to the 7. If you need to scrap the unit local regulations about waste disposal. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 79: Annex A - Chilled Water Circuit Scheme
Chilled water coil Manual air bleeding valve Valve fittings Drain valve Chilled water PIC valve Pipe size Ø A 64 mm Ø B 64 mm Ø C 54 mm VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 81: Annex B - Safety Labels
Do not remove or cover the labels placed on the unit by the manufacturer. Check regularly that the warning label are still on the unit and that they are clearly visible. Replace any missing or damaged label. Labels list Identification Description VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 82: Labels Position
Labels position VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 83: Annex C - Connections
Low voltage cables (optional) Ø 48 mm Free cutout Ø 48 mm Customer low voltage connection 3 x Ø 36 mm Dimensions for piping – Top connection (Top view) VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 84: External Cw Piping Connections
External CW piping connections CW OUTLET (OCW) Ø 64 mm CW INLET (ICW) Ø 64 mm VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 85: Annex D - Ats (Automatic Transfer Switch)
- Maintenance and servicing operations must be performed only by trained and authorized personnel. Arc hazard - Ensure that no metal objects can fall in the cabinet (risk of electrical arcing). VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 86: Description
Three types of ATS are available: - Type 03: configurable through four potentiometers and DIP switches ATS feedback (optional): Monitoring Relay to provide customer information for use of Main or Backup line. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 87: Specifications
Fault Product OK Wait Auto Mode Manual Mode Manual retransfer NOTE To reset a fault, it is required to open the cover. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 88: Technical Data
• Insert your padlock [C] in the clip (4-8 mm shackle diameter). Now the switch is locked in the power disconnecting position. NOTE: The handle can be padlocked only in the “O” position. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... - Page 89 Return time, minimum required time to return on the main/priority Potentiometer 4 0 sec line NOTE For different voltage and frequency, please contact the Vertiv™ Technical Support. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®...
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Page 90: Operation
NOTE Keep the cover open if you do not want the ATS to be in automatic mode during the initial power-up. NOTICE Before powering on the ATS, manually operate it to ensure that it can move normally. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 91: Maintenance
- outgoing line (load side) - control cables • For the ATS type 03: adjust the configuration settings. • Connect the PWM unit to the power supply. • Restart the PWM unit. VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... -
Page 92: Troubleshooting
This pin The “AUT” LED is not lit even when the cover is closed activates the sensor which indicates the position of the cover (open or closed). VERTIV™ | Liebert PWM 30 | UM | 10037309MAN_ENG | 16.01.2024 ®... - Page 94 , via Leonardo Da Vinci 16/18, Zona Industriale Tognana, 35028 Piove di Sacco (PD) Italy, Tel: +39 049 9719 111, Fax: +39 049 5841 257 © 2022 Vertiv Co. All rights reserved. Vertiv, the Vertiv logo and Vertiv Liebert PWM are trademarks or registered trademarks of Vertiv Co. All other names and logos referred to are trade names, trademarks or registered trademarks of their respective owners.
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