Vertiv Liebert PDX - Water Connections; General Water Tubing Warnings; Condensate Drain and Humidifier Connections; Electrical Connections

18
Liebert
®
PDX, EconoPhase Version - UM - 265133 - 29.08.2019
5 - Water connections
5.1 - General warnings
ENSURE THAT THE TUBING DOES NOT OBSTRUCT THE AIR
FLOW (Downow units only).
IF THE TUBING IS TO RUN OUTDOORS, ADD ETHYLENE
GLYCOL TO THE CIRCUIT.
5.2 - Water connections
5.2.1 - Condensate drain (for unit without condensate pump);
(Fig. 10):
• Use galvanized steel, PVC or exible polythene tubing.
• Allow a 1% gradient towards the drain.
• It is necessary to make a drain trap (1) placed at least 200mm
below the drain tray (2). In the Upow conguration units the
drain trap must be placed under the unit, in the false oor.
Caution: If the drain trap is done inside the fan module
in the Downow congurations attach the tube and the
drain trap properly to the fan module frame using a
cable tie, avoiding the risk of contact with fans.
• Fill the drain trap with water (3).
Fig. 10 - Condensate drain
5.2.2 - Humidier (optional):
See Enclosure A.
6 - Electrical connections
6.1 - Electrical connections
1. Before proceeding with the electrical connections, ensure that:
• all electrical components are undamaged;
• all terminal screws are tight;
• the supply voltage and frequency are as indicated on the unit.
6.2 - Wye vs. Delta Connection Power Supply for PDX
The Liebert
®
PDX EC Fan Model is designed to operate with Wye-
connected power. It will not operate properly with Delta connected
power. A eld-supplied isolation transformer or other power
solutions will be needed for proper function. The electronically
commutated motors included in the Liebert
®
PDX are suitable for
connection to power supplies with a solidly grounded neutral.
Fig. 11 - Wye vs. Delta power supply connection diagram
Acceptable Power Supplies-380V to 460V Nominal Units (TT
System, TNS System or TNC System)
• 380V wye with solidly grounded neutral and 220V line-to-
ground
• 460V wye with solidly grounded neutral and 277V line-to-
ground.
Unacceptable Power Supplies - 380V to 460V Nominal Units
(IT System)
• Wye with high-resistance (or impedance) ground
• Delta without ground or with oating ground
• Delta with corner ground
• Delta with grounded center tap.
If the unit must be installed in the IT System, contact Vertiv
Technical department prior to installation.
6.3 - Power supply cable connection.
• Connect the cable to the Line inlet terminal board. See Fig.12
power supply cable path. For units with dual power supply
option do not connect the power cable supply as illustrated in
Fig. 12; two supply cables must be arranged and connected to
the additional electrical panel placed near the main electrical
panel.
• Use the cable size dened according to maximum current
absorbed, the supply voltage, the installation type and the
local specication. For unit with dual power supply both supply
cables must be dimensioned as described above.
• The system/line cable protection is to be arranged by the
customer. Use a protection with di󰀨erential switch. If the
system is equipped with EC fans, use a B type switch.
• Use multipolar cables with sheath (CEI2022, IEC 60332) only.
• Do not t the supply cable in the raceways inside the machine
electric board.
See electrical data in Enclosure B: Technical data tables.
WARNING: For the units (in particular if the external
display isn’t installed) must be provided an external
main switch, easy to access, to facilitate, when
necessary the unit shutdown.
Fig. 12 - Power supply cable connection.
BRACKET
to be
connected
by user
2
3
min.
1
200 mm
min.
100 mm
Wye Power Supply
Connection
Delta Power Supply
Connection