Carrier 50TFQ004 Product Data page 74

Guide specifications (cont)
2. Standard Safeties:
Unit shall incorporate compressor overtempera-
ture and overcurrent safety devices to shut off
compressor.
I. Operating Characteristics:
1. Unit shall be capable of starting and running in
cooling at 125 F ambient outdoor temperature,
meeting maximum load criteria of ARI Standard
210/240 at ±10% voltage.
2. Compressor with standard controls shall be capa-
ble of cooling operation down to 25 F ambient
outdoor temperature.
3. Compressor shall be capable of operation in heat-
ing duty down to –10 F ambient outdoor-air tem-
perature.
4. Unit shall be capable of simultaneous heating duty
and defrost cycle operation when using electric
heaters indicated in Section L, Special Features.
J. Electrical Requirements:
All unit power wiring shall enter unit cabinet at a single
factory-predrilled location.
K. Motors:
1. Compressor motors shall be cooled by refrigerant
passing through motor windings and shall
have line break thermal and current overload
protection.
2. Indoor blower motor shall have permanently lubri-
cated bearings and inherent automatic-reset ther-
mal overload protection.
3. Totally enclosed outdoor-fan motor shall have
permanently lubricated bearings, and inherent
automatic-reset thermal overload protection.
L. Special Features:
Certain features are not applicable when the features
designated by * are specified. For assistance in amend-
ing the specifications, your local Carrier Sales Office
should be contacted.
* 1. Carrier PremierLink™ Controls:
a. Shall be available as a factory-installed or as a
field-installed accessory.
b. Shall work with CCN and ComfortVIEW™
software.
c. Shall be compatible with ComfortLink™
controllers.
d. Shall be ASHRAE 62-99 compliant.
e. Shall accept a CO
space — Demand Control Ventilation (DCV)
Ready.
f. Shall have baud communication rate of 38.4K
or faster.
g. Shall be Internet Ready.
h. Shall include
controller.
2. Apollo Control:
a. Shall serve as interface between thermostat,
Carrier rooftop unit, and any external field-
supplied sensors.
b. Shall be powered by 24 vac/10 va, supplies
thermostat with 10 vdc. This power is supplied
by the Carrier rooftop unit, and is factory
wired.
3. Roof Curbs:
a. Formed galvanized steel with wood nailer strip
and capable of supporting entire unit weight.
b. Allows for installing and securing ductwork to
curb prior to mounting unit on the curb.
74
sensor in the conditioned
2
an integrated economizer
* 4. Integrated Economizers:
a. Integrated integral-modulating type capable of
simultaneous economizer and compressor
operation.
b. Includes all hardware and controls to provide
cooling with outdoor air.
c. Equipped with low-leakage dampers not to
exceed 3% leakage at 1 in. wg pressure differ-
ential (Durablade economizer).
d. Capable of introducing up to 100% outdoor air
in both minimum and fully open positions.
e. Equipped with a gravity relief sliding plate
damper (Durablade economizer). Damper shall
close upon unit shutoff.
f. EconoMi$er shall be equipped with a baromet-
ric relief damper with up to 100% of return air
(004-007) or 90% of return air (008-012)
relief. The Durablade economizer is equipped
with 30% of return-air relief (004-012).
g. Designed to close damper during loss-of-power
situations with emergency power supply (Dura-
blade economizer) or spring return built into
motor (EconoMi$er).
h. Dry bulb outdoor-air temperature sensor shall
be provided as standard. Enthalpy control shall
be provided as an option.
i. Durablade economizer is a guillotine-style
damper, and the EconoMi$er is a gear-driven,
parallel blade design.
NOTE: EconoMi$er shall also be available with
field-installed two-stage power exhaust acces-
sory for vertical or horizontal duct applications.
5. 25% Manual Outdoor-Air Damper:
Manual damper package shall consist of damper,
birdscreen, and rainhood which can be preset
to admit up to 25% outdoor air for year-round
ventilation.
6. 50% Manual Outdoor-Air Damper:
Manual damper package shall consist of damper
birdscreen, and rainhood which can be preset to
admit up to 50% outdoor air for year-round
ventilation.
* 7. 100% Two-Position Damper:
a. Two-position damper package shall include
single blade damper. Admits up to 100% out-
door air.
b. Damper shall close upon indoor fan shutoff.
c. Designed to close damper during loss of power
situations.
d. Equipped with barometric relief damper.
* 8. 25% Two-Position Damper:
a. Two-position damper package shall include
single blade damper and motor. Admits up to
25% outdoor air.
b. Damper shall close upon indoor fan shutoff.
* 9. Solid-State Enthalpy Control:
a. For use with Durablade economizer package
only.
b. Capable of sensing outdoor-air enthalpy con-
tent (temperature and humidity) and controlling
economizer cut-in point to have minimum heat
content air passing over the indoor coil for
most efficient system operation.