Electrical - Wiring - American Standard 2TEE3D37A1000A Installer's Manual

Installer's Guide
Seal weep
hole except
for Downflow
configuration
Figure 21
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 21.
Two secondary drain connections are provided for the
different orientations (See Figure 21). The lower of the
two should be connected as a backup to prevent conden-
sate overflow by a blocked primary drain. The weep
hole in center of drain coupling area should be sealed
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.
14
3/4" NPT
Secondary
drain
connection
3/4" NPT
Primary drain
connection
2" MINIMUM
2" MINIMUM
Figure 22
Figure 23
with caulk or RTV except in downflow unless secondary
drain is connected.
For proper drainage of condensate, the following steps
must be followed:
1. The primary drain line must be trapped with a
minimum of 2" water seal as shown in Figures 22 &
23. Do NOT use preformed 3/4" PVC running
traps.
The use of Field fabricated or manufactured traps
as shown in Figures 22 & 23 is acceptable. The
manufactured trap shown in Figure 22 allows for a
float switch option to be added.
Refer to the float switch manufacturers data and in-
structions 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 Figures 22 & 23).
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.
8. Do not connect the drain line to a closed drain sys-
tem.
®
9. Use Teflon tape on the air handler drain line con-
nections! Do Not Use pipe joint compound or PVC/
CPVC cement!
It is always recommended that an auxiliary drain pan
be installed under a horizontally installed air handler.
Connect the auxiliary drain line to a separate drain line
(no trap is needed in this line) and terminate according
to National and Local codes.
NOTE: DO NOT use a torch or flame near the plastic
drain pan coupling.
NOTE: DO NOT tighten the drain pipe excessively. Sup-
port the condensate piping and traps outside the unit
to prevent strain on the drain coupling.
H. ELECTRICAL — POWER WIRING
1. These Air Handlers are shipped from the factory
wired for 230 volts. The units may be wired for 208
volts. Follow instructions on unit wiring diagram lo-
cated on blower housing and in the Service Facts
document included with the unit.
2. The selection of wire and fuse sizes should be made
according to the Minimum Branch Circuit Ampacity
and the Maximum Overcurrent Device listed on the
unit nameplate.
18-GE10D1-5