Condensate Drain Piping - Trane 4TEE3D01B1000A Installer's Manual

Figure 19. Braze Shield
G. CONDENSATE DRAIN PIPING
NOTE: Make certain that the unit has been installed in a
level position to ensure proper draining.
®
NOTE: Use Teflon tape on the Air Handler drain line connec-
tions! Do Not Use pipe joint compound or PVC/CPVC
cement!
The indoor blower is downstream of the evaporator coil
which creates a negative pressure at the condensate
drain connections during operation. The condensate
drain connections in front of the indoor coil are 3/4"
NPT. The lower right connection is the primary drain.
See Figure 20.
Two secondary drain connections are provided for the
different orientations (See Figure 20). The lower of the
two secondary drains should be connected as a backup
to prevent condensate overflow by a blocked primary
drain. The weep hole in the center of drain coupling
area should be sealed with caulk or RTV unless second-
ary drain is connected.
Seal weep
hole
Figure 20. Drain Connections
18-GE15D1-2
3/4" NPT
Secondary
drain
connection
3/4" NPT
Primary drain
connection
Installer's Guide
EZT-105
Figure 21. Manufactured Traps
CAP OR PLUG
2" MIN. 2" MIN.
2" MIN. 2" MIN.
Close as possible
Trap must be within 4'
of air handler condensate
drain connection.
Figure 22. Field Fabricated Traps
For proper drainage of condensate, the following steps
should be followed:
1. The primary drain line must be trapped with a
minimum of 2" water seal as shown in Figures 21 &
22. Do not use preformed 3/4" PVC running
traps.
The use of field fabricated or manufactured traps as
shown in Figures 21 & 22 is acceptable. The manu-
factured trap shown in Figure 21 allows for a float
switch option to be added. Refer to the manufactur-
ers data and instructions for details.
2. The trap must be located within 4 feet of the Air
Handler drain outlet connection.
3. It is recommended that a clean-out tee or cross be
installed in the primary drain line for future main-
tenance (See Figure 21 & 22).
4. Do not use reducing fittings in the condensate drain
lines.
5. Slope the drain lines downward a minimum of 1/4"
per foot.
6. Insulate the primary drain to prevent sweating
where pipe temperature could meet or fall below
dewpoint temperatures.
2" MINIMUM
2" MINIMUM
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