11
OPTIONS, continued
the evaporator under full load will maintain pressure on the
leaving side of the hot gas bypass valve to keep the valve port
closed. Should the load on the evaporator decrease to the
point where the coil is below the desired setting, the pressure
on the discharge of the hot gas bypass will put pressure on the
diaphragm overcoming the spring pressure on the seat and al-
lowing some hot gas to mix with the normal liquid discharge
of the expansion valve raising the evaporator pressure. This
reduces the cooling capacity of the unit to match the load.
3-Way Water Regulating Valve - 3-way water regulating
valve for pressure control may be ordered to replace standard
2-way valve installed in water/glycol unit. 3-way valves pro-
vide control of condensing temperature maintaining constant
system capacity and condenser water fl ow.
Condensate Pump - Condensate pumps may be ordered as
factory installed or for fi eld installation. Condensate pumps
are complete with sump, motor, and automatic control. The
pumps are rated for 130 GPH at 20 foot maximum or 40 GPH
at 20 feet with check valve. Pumps shipped loose are avail-
able in 115, 230, or 460 volt.
Upfl ow Plenum - Upfl ow plenums are fully insulated with
front discharge air grille. Side grilles for both or one side
are available. Standard plenums are 18 inches high and are
painted to match the unit color.
Floorstand - Floorstands are adjustable -1/+3 inches and are
available with a factory installed turning vane or with seismic
construction.
Seismic Bases - When required you can order 12” to 24” seis-
mic bases for your unit.
Vibration Isolation Pads - Ribbed neoprene cork fi lled pads
installed between either the evaporator or condenser unit and
the fl oor. These pads minimize the vibrations created with the
operation of the unit resulting in quieter operation
Compressor Sound Jackets - Should you have a concern
about the noise generated by the compressor one way to mini-
mize the noise is by using this option. Jackets are shipped
loose and must be installed in the fi eld.
Extended Compressor Warranties - Data Aire offers either
a two year or a four year extended compressor warranty in
addition to the standard three parts parts warranty. These
extended warranties cover parts only - not labor.
Site Monitoring Devices
DARA-4 - Data Aire Relay Auto Changeover controller allows
for unit rotation and backup capabilities while interfacing via a
summary alarm with BMS systems. This economical controller
manages up to four Data Aire units.
(36 paginas)
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