31VERTIV™ - Liebert
®
EFC - UM - 10040805MAN_ENG - 30.03.2023
The following minimal requirements are recommended for any type
of installation.
a. Provide adequate supports for external circuit and thermal
expansion joints with vibration isolators.
b. Position water pipes and water circuit devices, checking
inspection panel openings and access to any unit section.
c. Avoid damages to water connection soldering by fastening
mechanical connections with care without applying any torsion
to the same.
Furthermore, water circuit should be provided with:
1. Water drain to be positioned at the unit lowest point;
2. For chilled water coil (CW Backup):
- Vent valve at the circuit highest point to allow easy
replenishment;
Installer must obviously guarantee the requested value of water
All connections should be made with the best available current
workmanship practice according to the indicated dimensions of
inlet and outlet diameters, using stainless steel, PVC or polythene
tubing, while Copper has to be avoided.
Ensure the water discharge line is free, without any
obstruction, with a drain capacity of at least 1200 l/h.
This requirement must be guaranteed also when
multiple units may require simultaneous bleed .
With this drain capacity, the unit tank full of water can
discharge in around 20 minutes.
make sure that all connections have been done properly, which
means they are completed and without mistakes.
The water and drain connection of the Liebert
®
EFC220 unit are
presented in the picture below.
4000.0
157.48
D
D
50.0
1.97
WATER DISCHARGE
OD 50 mm
WATER FEEDING
R 3/4 - ISO 7/1
2362.5
93.01
216.7
8.53
172.5
6.79
1248.3
49.15
100.39
D
D
SECT. D-D
208.0
8.19
255.5
10.06
172.5
6.79
WATER DISCHARGE
OD 50 mm
WATER FEEDING
R 3/4 - ISO 7/1
150.0
5.91
50.0
1.97
1198.3
47.18
216.7
8.53
The water and drain connections of the Liebert
®
EFC440 unit are
presented in the picture below.
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