18-GE08D1-10
9
Installer’s Guide
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 14.
Two secondary drain connections are provided for the
different orientations (See Figure 14). The lower of the
two should be connected as a backup to prevent con-
densate overflow by a blocked primary drain. The weep
hole in center of drain coupling area should be sealed
with caulk or RTV except in downflow unless second-
ary drain is connected.
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 15
& 16.
Do not use preformed 3/4" PVC running
traps.
The use of Field fabricated or manufactured traps
as shown in Figures 15 & 16 is acceptable. The
manufactured trap shown in Figure 15 allows for a
float switch option to be added. Refer to the manu-
facturer’s 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 Figures 15 & 16)
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 out-
door installation instructions.
5. Seal around refrigerant lines.
PAINTED AREAS OF UNIT MUST BE SHIELDED
DURING BRAZING.
r
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 dew point temperatures may be met.
7.
Provide means for drainage to prevent win-
ter 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 ac-
cording to 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.
BRAZE SHIELD
e
3/4" NPT
Primary drain
connection
3/4" NPT
Secondary
drain con-
nection
Seal weep
hole except
for Downflow
configuration
