IMPORTANT
Do not install the control panel where it may not accurately
sense the relative humidity such as near HVAC supply
registers, near exterior doors, on an outside wall, near a
window, or near a water source.
The installer must supply the wiring between the UA-90H and the
control panel. Be sure to safely route the control wiring to prevent
damage during installation.
CAUTION
Do not cross wires when connecting the UA-90H and the remote
control panel or damage to the transformer may result. The remote
controls of the UA-90H are powered by a low voltage circuit
(24VAC) and must NEVER contact or be connected to a high voltage
circuit.
The control wires leaving the UA-90H and the remote control
panels are numbered and color-coded to prevent confusion. Some
of the control wires leaving the UA-90H may not be used with
certain control panels and should be left unconnected with wire
nuts taped onto the stripped ends for safety. Be sure to consult the
electrical schematic in this manual or inside the access panel of
the UA-90H before making control connections.
4.3 Condensate (Water) Removal
IMPORTANT
A trap in the drain line is preferred, but not required for the unit to
drain properly. Local codes may require a trap. Use care to keep the
pipe assembly as flat to the floor as possible. Kinks and/or humps
will prevent proper drainage. The UA-90H generates condensate.
Install a 3/4" male nominal pipe thread adapter to the drain pan.
It is necessary to assemble your own drain pipe assembly utilizing
3/4" PVC pipe to get the condensate to a floor or other drain. Pipe is
commonly available in 10’ lengths from building supply, plumbing
or hardware stores. Grade of pitch should be 1" per 10'.
4.3A Lifting Condensate
An optional condensate pump kit may be installed if a lift is
required to dispose of the condensate. The condensate pump can
be ordered direct from the factory. See the optional parts list in
Section 8 for information on the kit.
4.3B Condensate Pump Kit
An optional condensate pump kit is available from the factory for
use with the UA-90H. Condensate is automatically pumped to a
remote location when the water level in the pump’s reservoir rises
to close the float switch. The pump also contains a safety float
switch. The white leads from this switch extend from beneath the
pump cover. This switch should be installed in series with the field
wire that connects the blue (#5) lead from the UA-90H to the the
control panel. If the pump fails, this switch opens the compressor
control circuit and stops water production before the reservoir
overflows. The UA-90H will continue to ventilate or circulate air as
normal, but will not dehumidify until this switch closes.
4.4 Ducting
IMPORTANT
Attention: For ventilation only! Remove label and 6’’ round
insulation from the duct prior to installing ducting for outside
ventilation. For all other applications leave in place.
For the ideal installation, draw air from the central part of the home
and return it to the isolated areas of the home like the bedrooms,
den, utility room, or family room. The ductwork of the existing
heating system can be used to supply air to the home. If the
existing supply goes to isolated areas of the home, discharge the
supply of the UA-90H into the supply of the existing heating system.
Installation of a separate supply duct to the UA-90H from a central
area is recommended.
4.4A Fresh Air/Supply Air
IMPORTANT
DO NOT draw air directly from the kitchen, laundry, or isolated
basement.
You may draw air from a basement that is open to the home. All
flexible ducting connected to the UA-90H should be UL listed.
A short piece of flexible ducting on all UA-90H duct connections
is recommended to reduce noise and vibration transmitted to
rigid ductwork in the structure. Ducting the UA-90H as mentioned
requires consideration of the following points:
Duct Sizing: For total duct lengths up to 25’, use a minimum 10"
diameter round or equivalent rectangular. For longer lengths, use a
minimum 12" diameter or equivalent. Grills or diffusers on the duct
ends must not excessively restrict airflow.
FOR HVAC INSTALLER ONLY
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Ultra-Aire 90H Installer’s & Owner’s Manual
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Ultra-Aire 90H Installer’s & Owner’s Manual
