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18
PIPING INSTALLATION
Indoor Condensate Drain Piping
Observe all local sanitary codes when installing condensate drains.
WARNING
See Table below for Condensate Drainage port size.
Pitch the condensate drain pipe at a gradual 2.5% pitch (Example: ΒΌ-in drop over a 10-in length)
without obstructions. Use pipe hanger/brackets to support the condensate drain pipe from dropping.
NOTE: Insulate entire interior section of condensate hose and/or pipes to prevent sweating
which may cause water stains or wall damage.
Gravity Drainage System with P-Trap and Vent
Typical Gravity Drainage System
Capacity Size (BtuH) Drain Connection Size
(OD)
18,000 1-1/8 (30)
24,000-48,000 3/4 (20)
Ceiling
Hangers
Wall
Ceiling
Hangers
Trap
Vent
Wall
CAUTION When utilyzing gravity condensate drainage, the internal lift condensate
pump must be disconnected and its wiring insulated to prevent shorting. All unused
condensate drain ports must be plugged to prevent leakage.
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