Condensate Drain Piping - Trane 4TEE3F48A1000A Installer's Manual

F. BRAZING TO EVAPORATOR SECTION
NOTE: A brazing shield is provided in the information
pack accompanying this unit. This shield fits over the
refrigerant fittings while brazing. Wet the shield before
brazing. See Figure 16.
IMPORTANT:
Do NOT unseal refrigerant tubing until ready to cut and
fit refrigerant lines.
1. Remove both sealing caps from indoor coil.
2. Field supplied tubing should be cut squared-off, en-
suring the tube is still round and free of burrs at
the connecting end. Clean the tubing to prevent
contaminants from entering the system.
3. Run refrigerant tubing into the stub sockets of in-
door unit coil. Refrigerant line openings must be
completely sealed.
4. Braze and evacuate according to indoor and outdoor
installation instructions.
5. Seal around refrigerant lines.
PAINTED AREAS OF UNIT MUST BE SHIELDED
DURING BRAZING
G. CONDENSATE DRAIN PIPING
NOTE: Make certain that the unit has been installed in a
level position to ensure proper draining.
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 connection is the primary drain. See
Figure 17.
Two secondary drain connections are provided for the
different orientations (See Figure 17). The lower of the
two should be connected as a backup to prevent conden-
sate overflow by a blocked primary drain.
3/4" NPT Secondary
drain connection
18-GE12D1-8
For proper drainage of condensate, the following steps
should be followed:
Figure 17
3/4" NPT Primary
drain connection
Installer's Guide
1. The primary drain line must be trapped with a
minimum of 2" water seal as shown in Figures 17 &
18. Do not use preformed 3/4" PVC running
traps.
The use of Field fabricated or manufactured traps
as shown in Figures 18 & 19 is acceptable. The
manufactured trap shown in Figure 18 allows for a
float switch option to be added.
Refer to the manufacturers 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 18 & 19).
Manufactured traps
EZT-105
Field fabricated trap
CAP OR PLUG
2" MIN.
2" MIN.
Close as possible
Trap must be within 4'
of air handler condensate
drain connection.
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.
7. Provide means for drainage to prevent winter
freeze-up of condensate line.
2" MINIMUM
2" MINIMUM
Figure 18
Figure 19
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