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The Apollo communicating control is
factory-installed into the rooftop unit
evaporator-fan section (007) or unit
control box (008-014), and comes
equipped with built-in diagnostic capa-
bilities. Light-emitting diodes (LEDs)
simplify troubleshooting by indicating
thermostat commands for both stages
of heating and cooling, evaporator-fan
operation, and economizer operation.
The Apollo communicating control is
designed to work specifically with the
Carrier TEMP and VVT
®
(variable vol-
ume and temperature) thermostats.
The Apollo control combined with
Carrier thermostats incorporate a
5-minute recycle delay timer between
modes of operation to prevent short
cycling.
The standard rooftop control system
is readily adaptable to all conventional
and programmable thermostats. In ad-
dition, units with Apollo controls are
suitable for integration into building
monitor control systems if required.
This system gives the 50TFF units the
flexibility to communicate with almost
any thermostat or building control
system.
Indoor-air quality begins with
Carrier rooftops
Sloped condensate pans minimize bio-
logical growth in rooftop units in accor-
dance with ASHRAE Standard 62.
Standard 51 mm (2-in.) filters with
optional dirty filter indicator switch pro-
vide for greater particle reduction in the
return air. The face-split evaporator
coils improve the dehumidification ca-
pability of the standard units, and
standard enthalpy controls provided
with the optional or accessory econo-
mizers maximize building humidity
control. The 50TFF units also have an
accessory, 100% open, two-position
damper to meet all your fresh outdoor
air requirements.
For units without economizer, year-
round ventilation is enhanced by a
manual outdoor-air damper (ordered as
an accessory or an option on 50TFF
units). The damper can be preset to ad-
mit up to 50% outdoor air.
Model number nomenclature
Features/Benefits (cont)
LEGEND
Al
—
Aluminum
Cu
—
Copper
FIOP —
Factory-Installed Option
*Refer to 50TFF ordering data or contact your local Carrier representa-
tive for 50TFF FIOP code table.
†All coils have copper tubes.
®
IS
O
90
01:2000 #A
23
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Quality Assurance