7
E SERIES INSTALLATION MANUAL
1/4'' Pitch
Drain
1.5"
1.5"
Vent (if needed)
3/4" PVC
3/4" barb to
glue adapter
1/8" per foot
Clear PVC hose
Plastic Hose Clamps
Copper tube stub
(Included with unit)
Figure 6: Unit Pitch for Drain
Figure 5: Horizontal Drain Connection
Water Quality
In ground water situations where scaling could be heavy or where biological growth such as iron bacteria will be pres-
ent, a closed loop system is recommended. The heat exchanger coils in ground water systems may, over a period of time,
lose heat exchange capabilities due to a buildup of mineral deposits inside. These can be cleaned, but only by a qualified
service mechanic, as special solutions and pumping equipment are required. Desuperheater coils can likewise become
scaled and possibly plugged. In areas with extremely hard water, the owner should be informed that the heat exchanger
may require occasional flushing.
Freeze Protection
Set the freeze protection switch SW2-2 on the printed circuit board for applications using a closed loop antifreeze solu-
tion to “LOOP”. On applications using an open loop/ground water system (or closed loop no antifreeze), set this dip switch
to “WELL”, the factory default setting. (Refer to the Dip Switch Field Selection table on page 18.)
Condensate Drain
On vertical units, the internal condensate drain assembly consists of a drain tube which is connected to the drain pan, a
3/4-inch PVC female adapter and a flexible connecting hose. The female adapter may exit either the front or the side of the
cabinet. The adapter should be glued to the field-installed PVC condensate piping. On vertical upflow units, a condensate
hose is inside all cabinets as a trapping loop; therefore, an external trap is not necessary. On horizontal units, a copper stub
is provided for condensate drain piping connection. An external trap is required (see below). If a vent is necessary, an open
stand pipe may be applied to a tee in the field-installed condensate piping.
