Piping; European Union Fluorinated Greenhouse Gas Requirements; System Connection Configuration; Figure 12 Typical Liebert Xdr Piping-Interlaced Connections - Emerson Liebert XDR User Manual

6.0 P
IPING
Refer to site-specific drawings for general locations of the piping connections. The drawings should
specify where the piping connects to the Liebert XDR.
6.1

European Union Fluorinated Greenhouse Gas Requirements

Stationary air conditioning, refrigeration, heat pump equipment and stationary fire protection sys-
tems in the European Community market and operating with fluorinated greenhouse gases (f-gas),
such as R407C, R-134a, R410A, must comply with the F-Gas Regulation: (EC) No. 842/2006 (F-gas).
The regulation prohibits, among other actions, venting fluorinated greenhouse gases to the atmo-
sphere.
The F-Gas Regulation requires operators to use all measures that are technically feasible and do not
entail disproportionate cost to prevent leakage of these gases, to test for leakage regularly and to
recover f-gas before disposing of equipment, as well as during service and maintenance.
Refer to the full regulation for additional details.
6.2

System Connection Configuration

If possible, connect the Liebert XDR modules to Liebert XDPs or Liebert XDCs in an interlaced
configuration (see Figure 12). In an interlaced configuration, half the cooling modules in an aisle are
connected to one Liebert XDP or Liebert XDC and the other half in that aisle are connected to another
Liebert XDP or Liebert XDC. Interlacing the connection piping will keep half the Liebert XDR
modules operating and maintain cooling in the conditioned space should one of the Liebert XDP or
Liebert XDC units fail.
However, if this is not possible, connect the Liebert XDR modules in a non-interlaced configuration
(see Figure 13).
Figure 12 Typical Liebert XDR piping—interlaced connections
DRAWING IS
NOT TO SCALE
Liebert XDP /
Liebert XDC A
Supply
Return
Return
Supply
Liebert XDP /
Liebert XDC B
NOTE: Line size does NOT
indicate pipe size difference .
TOP VIEW
Liebert Liebert
XDR A XDR B
Liebert Liebert
XDR B XDR A
14
Liebert Liebert
XDR A XDR B
Liebert Liebert
XDR B XDR A

Piping