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I
NSTALLATION
Recirculation Air Compartment Opening
Final Cutout Opening for Recirculation Air:
Create an additional hole in the compartment
where the system is installed, in order to permit
recirculation of the internal air.
It would be best to locate the cutout near to the
front of the machine. If the opening cannot be
made near the machine, ensure that the air ow is
not obstructed by anything and create an air duct
between the opening and the machine, if necessary.
e cutout should be roughly 50 in
the hole will be closed with a grille supplied.
Only allow this recirculation air to enter the
compartment from within the passenger section.
If the air entering this opening is from the outside,
the performance of the machine would diminish.
Finally, install the condensation drain tubes
provided with the system onto the bottom ports.
Air Ducting
Ductwork Best Practices:
Craft the ducting used to distribute the air using trade
parts which are not included with this system supply.
It is advised to use cardboard pipe for air conditioning,
with an aluminum core and external PVC covering.
e nominal Inner Diameter should be sized up to 2"-3/8,
and the Outer Diameter up to 2"-1/2.
e tapered hole on the air outlet allows the ventilation
ducts to be joined by pressing them together.
Use either the outlet on the coil side, or the side outlet (by
removing the guard and closing the front holes) to connect
the ducts.
For optimal e ciency, it is advised to:
• Route the air ducts as short and at as possible.
• Do not exceed 16 ft in duct length.
• Avoid laying the air ducts near any sources of heat.
Avoid condensation on the ducting by insulating the
pipes with insulation material (sold separately).
20
I
NSTRUCTIONS
in size, and
2
support@pdhvac.com | (800)-675-7410 | https://www.pdhvac.com/support/
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