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Chilled Water Models
55 Liebert
®
Challenger 3000
™
6.0 CHILLED WATER MODELS
6.1 Piping Considerations
Manual shutoff valves should be installed at the supply and return lines to each unit. This will
provide for routine service and emergency isolation of the unit.
Consideration of the minimum water temperature to be supplied from the chiller will determine if the
need exists to insulate supply and return lines. Insulation will prevent condensation on the supply
and return lines.
To provide for the emergency of water leaks and the consequences of sub-floor flooding, floor drains
should be provided with wet traps or a water detection system, such as a Liebert Liqui-tect
®
, that is
installed near the base of the unit or below the elevated floor.
Figure 29 Chilled water general arrangement - Upflow (BU)
A
B
AB
FACTORY PIPING
SL-11899
Pg. 5
Air
Flow
Air
Flow
Chilled
Water
Coil
Chilled
Water
Coil
Bleed
Valve
Bleed
Valve
Valve
Actuator
Valve
Actuator
Valve
2-Way
Chilled
Water
Valve
Flow
Switch
(optional)
Chilled
Water
Supply
Chilled
Water
Supply
Chilled
Water
Return
Chilled
Water
Return
Hose
Bibs *
Hose
Bibs *
Shutoff
Valves *
Shutoff
Valves *
3-WAY VALVE
2-WAY VALVE
*Components are not supplied by Liebert but
are recommended for proper circuit operation
and maintenance.
FIELD PIPING
3-Way
Chilled
Water