Maytag Amana PMH Series Service And Troubleshooting page 47

SERVICING
The DigiAIR™ fan, when the unit is properly powered and
maintained, will operate 24/7/365 to provide continuous
outside makeup air, even when the compressor is not
operating. For installation locations where the winters are
cold, or it is desired to warm the air coming through the Di-
giAIR™ system before it enters the room, an optional 250
watt electric heater is available for the make-up air system.
Condensate water generated from the DigiAIR™ dehumid-
ifier operation drains directly into the PTAC's exterior base
pan. When the PTAC's R410A compressor is operating in
the cooling mode, and the outside air temperature is above
60° F, condensate water in the PTAC's exterior base pan
will be picked up and slung onto the condenser coil for
re-evaporation to the outside air. Excess condensate is
drained into the PTAC's wall case from which it can drain
either to the outside through the drain holes in the sleeve
or piped to a drainage system with the use of an optional
drain kit. Since condensate water can be generated from
the PTACs compressor operation in either the cooling
mode or, in the case of a heat pump, during reverse cycle
operation plus the added condensate water generated from
the DigiAIR™ dehumidification operation, a piped conden-
sate drain system is highly recommended.
• NOTE: A DigiAIR™ module is intended to work in
conjunction with a building exhaust system. As an exam-
ple, to obtain 55 CFM of outside makeup air, the room
exhaust ventilation system needs to create a 0.053 (inches
H2O) negative static pressure in the indoor conditioned
room. CFM can be increased or decreased by increasing
or lowering the negative static pressure created by the
property ventilation system. The DigiAIR can provide up
to 75 CFM when negative static pressures are increased
to a high enough level. Failure to properly exhaust the air
introduced by the DigiAIR™ makeup air module will result
in poor performance of both the outside air volumes (CFM)
and the proper dehumidification of the makeup air.
This unit is shipped, tested and rated with the dehumidifica-
tion switch off.
Dehumidification Kit Volts
Frequency (Hz)
Phase
Dehmid Comp. RLA
Dehumid comp. LRA
Res. Heat Watts
Res. Heat Amps
Refrigerant R-134A Oz.
High Side Pressure (Psig)
Low Side Pressure (Psig)
Air Flow (CFM )
Dehimidification (Oz/Hr)
Kit Weight (lbs)
DigiAIR™ System Features
DigiAIR™ is a factory added module to an Amana brand
PTAC to provide for outside makeup air that is dehumidified
when needed:
1. Lower installation and renovation costs than typical cen-
tral dedicated outdoor air systems (DOAS).
2. Configurable dehumidification settings based on HVAC
industry psychometric data. Configuration can easily
and accurately be adjusted through a few button clicks
of the PTAC touchpad by any authorized site personnel.
3. Outside Makeup air volumes of up to 75 CFM.
4. Drier room conditions (lower RH %) usually means that
room occupants will feel comfortable at higher sensible
temperatures saving PTAC operational costs.
5. Optional 250 watt electric heater to warm colder outside
air when needed.
6. Filter to assist in keeping the DigiAIR™ coils cleaner to
maintain dehumidification and outside air flow. Perma-
nent and washable.
7. Vent door is configurable to either be open 100% of
the time or can be closed if codes permit intermittent
operation.
8. Future, optional Web access to allow monitoring and
configuration access through an Amana DigiSmart /
DigiLink internet connectivity.
Installation Instructions
The DigiAIR™ makeup air and dehumidification module is
factory installed to the PTAC partition panel and base pan
as shown in Figure 2. The optional heater, to raise the inlet
air temperature in cold climates, is attached to the indoor
section of the partition panel. The DigiAIR™ power switch
is shipped from the factory in the "off" position. Before in-
stalling the PTAC front cover, change the DigiAIR™ power
switch to the "on" position if makeup air is desired. The
DigiAIR™ power switch is located on the front of the PTAC
control and is visible when the front is not installed. Also,
if the DigiAIR™ vent door is to be manually secured in the
open position, the vent door screw must be inserted before
the PTAC is installed into the wall sleeve.
230
60
1
1.05
3.30
250
1.10
3.20
200
60
55
5
20
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