IOM / Rooftop Smart and Linéa™ Range - Page 25
CONDENSATE DRAINS
The following practices are recommended to ensure
condensate removal. Before installation, check local codes
concerning condensate removal. Refer to figure 30 for typical
condensate piping.
1. Drain piping should not be smaller than drain
connection at coil.
2. A trap in the drain line is recommended when drain is
on the negative side of the system blower. This will
allow water to escape from the drain pan. It is also
advisable to trap the line when drain is on the positive
side of system blower. This will prevent conditioned air
from escaping through the drain line.
3. In most cases the trap will be deep enough to offset
the difference in static pressure between the drain pan
and the atmoshpere. If not the case, alternative traps
may be required.
NOTE-Unit condensate drain pipe opening must be
sealed air tight after installation of drain.
4. Horizontal runs must be pitched 25 mm per 3 metres
of drain line to offset line friction.
5. An open vent in drain line will sometimes be required
due to line length, friction and static pressure.
6. Drains should be constructed in a manner to facilitate
future cleaning.
7. On applications where a drain line is not required, install
a 90° elbow on drain connection to direct condensate
downward.
INS
INS
INS
INS
INST
T
T
T
TALLA
ALLA
ALLA
ALLA
ALLATION
TION
TION
TION
TION
TYPICAL CONDENSATE DRAIN(*)
Figure 30
(*) : Supplied with the unit
