Installation manual

7
ENVISION AIR HANDLER INSTALLATION MANUAL
Condensate Drain
To facilitate condensate removal, the air handler should
be pitched 1/4” towards the drain in both directions. The
drain line contains cold water and should be insulated in
unconditioned spaces to avoid drain line condensation
from dripping on ceiling, etc. The drain pan has a primary
and auxiliary drain connection. The air handler drain
connections must be connected to a drain line and pitched
away from the unit a minimum of 1/8” per foot to allow
the condensate to flow away from the air handler. A trap
must be installed in the drain line below the bottom of the
drain pan to ensure free condensate flow (units are not
internally trapped). The primary condensate drain must
be terminated to an open drain or sump. Do not connect
the condensate drain to a closed waste system. An open
vertical air vent should be installed to overcome line length,
friction and static pressure. It is recommended that the
auxiliary drain be connected to a drain line for all units.
The auxiliary drain should be run to an area where the
homeowner will notice it draining. The drain line should not
be smaller than the drain connection at the condensate pan.
If the air handler is located in an unconditioned space, water
in the trap may freeze. It is recommended that the trap
material be of a type that will allow for expansion of water
when it freezes. Drain lines must be in conformance with
local codes.
Air Handler Configuration
The Envision Air Handler is factory configured for upflow
and horizontal left hand air discharge installation (Figure 1).
For bottomflow or horizontal right hand discharge, certain
field modifications are required.
Warning: Do not lift or reposition the ‘A’ coil by grasping
the copper tube header or distributor. This could cause a
tubing fracture resulting in a refrigerant leak.
General Installation Information cont.
Figure 1 - Factory configuration is top discharge and
horizontal left hand air discharge.
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