Horizontal
installation
Condensate piping
A condensate drain line must
be installed and pitched away
from the unit to allow for proper
drainage. This connection must
meet all local plumbing/building
codes.
Zehnder Rittling condensate
connections are stainless steel.
Soldering or brazing of fittings
is difficult and mechanical
connection methods are
recommended. Condensate
piping should be isolated from
the unit through the use of a soft
connection to avoid transmission
of noise and vibration.
Pitch the unit toward the drain
as shown in Figure 3 (page 8) to
improve condensate drainage.
Ensure that unit pitch does not
cause condensate leaks inside
the cabinet. Install a condensate
trap at each unit with the top of
the trap positioned below the
unit condensate drain connection
as shown in Figure 7. Design
the depth of the trap (water-
seal) based upon the amount of
ESP capability of the blower. In
general, 1-1/2 inch (38mm) trap
depth is the minimum. Each unit
must be installed with its own
individual trap and connection
to the condensate line (main) or
riser.
Provide a means to flush or blow
out the condensate line.
Do not
install units with a common trap
and/or vent.
Always vent the condensate line
when dirt or air can collect in
the line or a long horizontal drain
line is required. Also vent when
large units are working against
higher external static pressure
than other units connected to
the same condensate main since
this may cause poor drainage
for all units on the line.
When a
vent is installed in the drain
line, it must be located after
the trap in the direction of the
condensate flow.
Ensure condensate line is
pitched toward drain 1/4" per ft
(21 mm per m) of run.
Figure 7: Horizontal condensate connection
1-1/2" (38 mm)
Vent
(by others)
3/4" copper or
PVC construction
(by others)
Soft connection to
unit condensate
nipple
1/4"/ft. (21 mm/m)
of drainage slope
1-1/2" (38 mm)
minimum
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