Installation Manual

Hydronic Air Handler Installaon and Operaon Manual 9
• Upflow
The blower should be set on top of the coil
section being used and the blower must be
supported on the bottom only and set on
solid floor or a field-supplied supporting
frame.
• Side Return (Left or Right Side)
Cut and remove panel as indicated by
perforations. Attach evaporator coil with
sheet metal screws (if using). Ensure bottom
portion of unit is sealed properly to prevent
air leakage.
• Bottom Return
The air handler must be supported on the
underside only and set on a field-supplied
supporting frame. Remove the bottom plate
of the air handler to create an air return
opening. Securely attach the air handler to
the supporting frame.
The air handler is approved for the following
configurations:
• Vertical: Upflow with bottom or side (left or
right side) return
• Horizontal: Upflow with bottom return
SUPPLY (Upflow)
RETURN
The air handler is not approved for the
following configurations:
• The air inlet is not allowed in the front
or back of the air handler.
Front
Back
• Multiple air handlers configured for
installation with a single Rinnai
tankless water heater or boiler is
prohibited.
• Do not position the air handler on its
front panel.
Front
Air flows in through bottom or
side (left or right side)
Vertical (upflow with bottom or side return)
Air flows out through top
Horizontal (Upflow with bottom return)
RETURN
Air flows in
through
“bottom
duct return”
SUPPLY
Air flows
out
through
“top”