Airmax MaxAir 100e P2, Design, Installation And Maintenance Instructions

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Page 18
When this potential exists, a secondary drain
pan should be installed under the entire unit.
This pan should also extend under the piping
connections and TX valve. This is especially
critical in attic installations where condensate
can cause damage to the ceiling
DX refrigerant cooling
When installing the fan coil, either in the
horizontal or vertical position, make certain
that the unit is installed level in order to
handle condensate drainage. The
condensate drain should be trapped, and the
drain line sloped toward the drain at a 1/4"
per foot slope. Ensure that no screws
puncture the drain pan.
The Airmax Accessory slab coil must be
installed in a vertical position (horizontal
airflow through the coil) or condensate
drainage problems will result. It is acceptable
use a field supplied “A” type evaporative coil
as long as the coil is located in the return air
section of the system. Contact your Airmax
representative for additional information.
Some building codes call for a secondary
drain pan under the entire unit. Check local
codes for more information. Any installation
that has the potential of property damage due
to condensate should have a secondary drain
pan installed. If the unit is installed in a high
heat and/or humidity location, extra insulation
around the unit casing may be required to
prevent excessive condensate from forming
on the outer surface of the casing. Install the
unit so that there is adequate clearance on all
sides for service and for piping runs.
When connecting the refrigerant lines to the
cooling coil, installations instructions with the
coil should be followed. It is also
recommended, but not mandatory that you
install a site glass and filter/drier at the
condensing unit, as well as both high and low
side access ports. This is useful for both the
system setup, and for future trouble shooting.
Care must be taken when mounting the
Airmax Accessory slab coil to the side or
back of a Airmax fan coil. This is
acceptable only with the use of a
minimum 6” spacer/transition. The short
spacer/transition fitting will move the coil
face away from the back of the fan/motor
housing. Failure to do so will cause
excessive or non-uniform velocity across
the coil surface and may cause
condensate to carry over into the fan coil
cabinet.
condensing unit
Locate the outdoor unit in a suitable location,
as close as possible to the fan coil. Maintain
the clearances recommended by the
condensing unit manufacturer’s installation
manual to ensure proper airflow. The outdoor
unit must be installed in a level, properly
supported location
anti-ice and TX valve
MaxAir ™ accessory DX evaporator coils
come with an anti-ice control frost thermostat
(see appropriate wiring diagram) installed on
the suction line. Ensure that the TXV bulb
and the frost thermostat control are fastened
securely and are well insulated.
DO
NOT use a self-tightening clamp on the frost
thermostat as excessive tightening may
damage the thermostat.
The remote sensing bulb for the TX valve
should be located on a clean,
horizontal
section of the suction line. It should be
mounted on the top half of the pipe in the 2
o’clock or 10 o’clock position.