EMI S1C - Page 8

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Side Discharge Condensers
8
Figure 1
Condenser
Evaporator
30'
15'
P-TRAP INSTALLATION
• A P-trap is recommended when the suc-
tion riser is equal to or greater than 20
feet in height.
• When the condenser is installed above
the evaporator, the P-trap will help the
return of oil back to the compressor.
• The placement of the P-trap should be
at the halfway mark of the suction riser.
For example if the suction riser is 30 feet
tall then a P-trap is recommended at the
15 foot mark of the suction riser (see
Figure 1).
• A P-trap may be fabricated using (2) street
elbows and (2) regular elbow. A prefab
-
INSTALLATION INSTRUCTIONS
ricated trap may be purchased from a
wholesaler or distributor however the trap
should be shallow as the (3) elbow con
-
figuration. Each elbow is approximately
2 equivalent feet. One P-trap is equal to
approximately 12 equivalent feet.
NOTE: Avoid excessive oil buildup.
The P-trap should have a shallow depth
and a short horizontal section.
• P-traps are not required at the foot of the
hot gas risers due to increased oil flow at
higher temperatures.