Vertical Discharge - Mars Comfort-Aire Century VCD24 SA Series Installation Manual

Installation and Operation Manual - VCDxxSA
NOTICE ON PURCHASING PIPES
Installation requires pvc pipe or other suitable material per local and national codes, which can be
obtained at your local hardware store or dealer.
WARNING
• After removal of drain pan plug(s), check drain hole(s) to verify that drain opening is fully open and
free of any debris. Also check to make sure that no debris has fallen into the drain pan during
installation that may plug up the drain opening. Seal around the exiting drain pipe, liquid and suction
lines to prevent infiltration of humid air.
•
On units of this type, where the blower "draws" rather than "blows" air through the coil, traps must be
installed in the condensate drain lines (primary and auxiliary, if used). Traps prevent the blower from
drawing air through the drain lines into the air supply.
Vertical Installations
These units operate with a negative pressure
at the drain connections and a drain trap is
required. The trap needs to be installed as
close to the unit as possible. Make sure the
top of the trap is below the connection to
the drain pan to allow complete drainage
of the pan.

Vertical discharge

Primary drain
Main
drain hole
Overflow
drain hole
NOTICE
Horizontal runs must also have an anti-siphon
air vent(standpipe) install ahead of the horizontal
run to eliminate air trapping.
NOTE ON DRAINPIPE INSTALLATION
• The Figure shows how to trap or plug all
drains during vertical discharge.
• The Figure shows how to trap or plug all
drains during right-hand discharge.
• The seal plug are supplied as accessories
and should be screwed tightly only by hand.
• Incorrect installation could cause water to
flow back into the unit and flood
CAUTION
The drainpipe outlet should be at least
5cm(1.9in) above the ground. If it touches the
ground, the unit may become blocked
and malfunction.
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