Vertiv Liebert CRV - Top or Bottom Connection for Refrigerant Piping on Air-Cooled Units

PARAMETER MAXIMUM DISTANCES, FT. (M)
From cooling unit to condenser 300 (91.4) equivalent length
From cooling unit to VFD condenser Above: 60 (18.3) Below: 15 (4.5)
From cooling unit to Liebert Lee-Temp™ condenser
Above: 60 (18.3) Below: 0 (0)
Table 6.4 Cooling unit maximum distance from the remote condenser—LiebertMCCondenser
withorwithout LiebertLee-Temp
6.2.2 Top or Bottom Connection for Refrigerant Piping onAir-cooled Units
The Liebert CRV can be connected to a condenser through either the top or bottom of the unit. The unit
is piped for connections at the top of the unit, shown in Figure 6.1 below, with provisions for connection
through the bottom.
Connecting through the bottom of the unit requires cutting the liquid and discharge lines as shown in
Figure 6.2 on the facing page. Cutting these lines just below the pipe clamps disconnects the top
connections from the rest of the refrigeration system.
NOTE: Clearances require using a smaller tubing cutter to make the refrigerant piping connections on
the top or bottom of the unit.
Air-cooled units are shipped with a holding charge of nitrogen.
Figure 6.1 Top refrigerant-piping connection on all unit models
ITEM DESCRIPTION
1 Toward front of unit
2 Toward rear of unit
3 Discharge connection
4 Liquid-line connection
NOTE: Figure 6.2 on the facing page shows the pipe clamps in an Air-cooled, 600-mm model
Vertiv | Liebert CRV Installer/User Guide | 38