GENERAL PIPING CONNECTION SIZES

CONNECTION SIZE (in.)
Refrigerant TransferConnections
1
⁄
2
ODS (female)
Condenser WaterCooling Connectors
1
⁄
2
NPT (female)
Safety Relief Head Pumpdown Condenser
3
⁄
8
Flare (male)
ODS — Outside Diameter,Sweat
LEGEND
Factory-Supplied Tubing
Field-Supplied Tubing
Field-Supplied Tubing(Multiple Chillers)
Service Valve(Factory Supplied)
Service Valve(Field Supplied)
NOTES:
1. Thefield-supplied tubing is to be
1
⁄
2
-in.OD tubing (min.) and must
be arranged and supported to avoid stresses on the equipment,
transmission of vibrations, and interference with routine access
during the reading, adjusting, and servicing of the equipment. If
thedistance from the chiller to the pumpout unit is over 50 ft, then
7
⁄
8
-in.OD tubing (min.) must be used. Provisions should be made
for adjustment in each plane of the tubing and for both periodic
andmajor servicing of the equipment. Special care must be taken
so that the safety head does not experience tubing strain. Vent
the safety head per ASHRAE 15 (American Society of Heating,
Refrigeration, andAir Conditioning Engineers), latest revision.
2. The tubing and valve from the storage tank to the pumpout com-
pressor is factory supplied when the unit is factory mounted.
Fig.6—Typical Pumpout Unit/Chiller Connection SchematicCHILLERS WITHOUT ISOLATION VALVES CHILLERS WITH ISOLATION VALVES(WITH OR WITHOUT PUMPOUT STORAGETANKS)
9