REV : B
REV : 08/2024
20000059
Page :1/2
PIPING SCHEMATIC
XDM300
COOLPHASE CDU
DPN001040_REV6
LIEBERT® MCV HEAT REJECTION SKID
Two-Circuit
Heat Exchanger
Check
Valve
Trap at base of risers
over 5ft. (1.5m)*
LIQUID RETURN
HOT GAS DISCHARGE
Liebert® EconoPhase
Ball Valve
Ball Valve
Check
Valve
Notes:
1. Two refrigeration circuits provided. Single refrigeration circuit shown for clarity.
2. Circuit 1 must be maintained between indoor unit, condenser and Liebert® EconoPhase unit. Circuit 2 must be maintained between indoor unit, condenser and Liebert® EconoPhase unit.
3. Schematic representation shown. Do not use for specific connection locations.
4. The bottom of the condenser coil must be less than 60' (18.3m) above and cannot be more than 15 ft (4.6m) below the elevation of the EEVs inside the indoor unit.
5. All indoor and outdoor field refrigerant piping must be insulated, 1/2" minimum thickness. All outdoor insulation must be UV and ozone resistant.
6. Components are not supplied by Vertiv but are required for proper circuit operation and maintenance.
7. Traps must be installed and horizontal lines pitched to ensure proper oil return and to reduce liquid flood back to compressor. Pitch horizontal gas piping at a minimum of
1/2" per 10 feet (42mm per 10m) so that gravity will aid in moving oil in the direction of the refrigeration flow.
8. Vertiv requires the installation of external refrigerant isolation valves on both the liquid line entering and the hot gas line leaving the indoor unit. These external isolation valves are
necessary to facilitate safe recovery of the refrigerant charge from the indoor unit before servicing the compressors, filter driers, or other refrigeration components. Prior to closing the
isolation valve on the liquid line, ensure that the indoor unit is in evacuation mode, which will open the EEV and will allow the migration of liquid refrigerant from this piping.
9. For rises over 25ft. (7.6m), trap every 20ft. (6m) or evenly divided
Service
Valve
Service
Valve
XDM300
Check
Valve
Liquid to Indoor Unit
Differential
Check Valve
Differential
Check Valve
SERVICE/SCHRADER (ACCESS) CONNECTION, WITH VALVE CORE.
FIELD PIPING
FACTORY REFRIGERANT PIPING
SERVICE/SCHRADER (ACCESS) CONNECTION, NO VALVE CORE.
2
2
6
6
Filter Drier
LIEBERT® MCV CONDENSER
2
2
INTERCONNECTING
PIPING
Sight
Glass
9
Hot Gas
Discharge
from Indoor
Unit
OUTDOOR
CONDENSER
Electronic Expansion Valve
Secondary
Circuit
Field Installed
Fusible Plug
(Optional)
Refrigerant Isolation Valves
8
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