141
b. Indoor-fan motor shall have permanently lubricated
bearings and inherent automatic-reset thermal overload
protection.
c. Totally enclosed outdoor-fan motor shall have
permanently
lubricated
bearings,
and
inherent
automatic-reset thermal overload protection.
13. Special Features:
Certain features are not applicable when the features
designated * are specified. For assistance in amending the
specifications, contact your local Carrier Sales Office.
a. Carrier PremierLink
™
Controls*:
(1.) Shall be available as a factory-installed or as a
field-installed accessory.
(2.) Shall work with CCN and ComfortVIEW
™
software.
(3.) Shall be compatible with
Comfort
Link
™
controllers.
(4.) Shall be ASHRAE 62-2001 compliant.
(5.) Shall accept a CO
2
sensor in the conditioned space
— Demand Control Ventilation (DCV) Ready.
(6.) Shall have baud communication rate of 38.4K or
faster.
(7.) Shall be Internet Ready.
(8.) Shall include an integrated economizer
controller.
b. Roof Curbs (Horizontal and Vertical):
(1.) Formed galvanized steel with wood nailer strip and
shall be capable of supporting entire unit weight.
(2.) Permits installation and securing of ductwork to curb
prior to mounting unit on the curb.
c. Horizontal Adapter Roof Curb:
Includes factory-assembled adapter and duct.
NOTE
: Power exhaust and barometric relief must be
mounted in the return ductwork when used in
conjunction with this accessory.
d. Integrated Economizers*:
(1.) Integrated integral modulating type capable of
simultaneous economizer and compressor operation.
(2.) Available as a factory-installed option in vertical
supply/return configuration only. (Available as a
field-installed accessory for dedicated horizontal
and/or vertical supply return configurations.)
(3.) Includes all hardware and controls to provide cooling
with outdoor air.
(4.) Equipped with low-leakage dampers, not to exceed
2% leakage at 1 in. wg pressure differential.
(5.) Capable of introducing up to 100% outdoor air.
(6.) EconoMi$er IV and EconoMi$er2 shall be equipped
with a barometric relief damper.
(7.) Designed to close damper(s) during loss-of-power
situations with spring return built into motor.
(8.) Dry bulb outdoor-air temperature sensor shall be
provided as standard. Outdoor air sensor set point is
adjustable and shall range from 40 to 100
_
F. For the
EconoMi$er IV, the return air sensor, indoor
humidity sensor, and outdoor humidity sensor shall
be provided as field-installed accessories to provide
enthalpy control, differential enthalpy control, and
differential dry bulb temperature control. For the
EconoMi$er2, the enthalpy, differential temperature
(adjustable), and differential enthalpy control shall be
provided as field-installed accessories.
(9.) The EconoMi$er IV and EconoMi$er2 shall have a
gear-driven parallel blade design.
(10.) EconoMi$er IV microprocessor control shall
provide control of internal building pressure through
its accessory power exhaust function. Factory set at
100%, with a range of 0% to 100%.
(11.) EconoMi$er2 shall be capable of control from a 4 to
20 mA signal through optional 4 to 20 mA design
without microprocessor control (required for
PremierLink
™
or third party control interface).
(12.) EconoMi$er
IV
Microprocessor
Occupied
Minimum Damper Position Setting maintains the
minimum airflow into the building during occupied
period providing design ventilation rate for full
occupancy (damper position during heating). A
remote potentiometer may be used to override the set
point.
(13.) EconoMi$er IV Microprocessor Unoccupied
Minimum Damper Position Setting — The
EconoMi$er IV dampers shall be completely closed
when the unit is in the occupied mode.
(14.) EconoMi$er2 Microprocessor Maximum Damper
Position Setting — Setting the maximum position of
the damper prevents the introduction of large
amounts of hot or cold air into the space. This
position is intended to satisfy the base minimum
ventilation rate.
(15.) EconoMi$er IV Microprocessor IAQ/DCV control
modulates the outdoor-air damper to provide
ventilation based on the optional 2 to 10 vdc CO
2
sensor input.
(16.) Compressor lockout sensor (opens at 35
_
F, closes at
50
_
F).
(17.) Actuator shall be direct coupled to economizer gear,
eliminating linkage arms and rods.
(18.) Control LEDs:
--When the outdoor-air damper is capable of
providing free cooling, the “Free Cool” LED shall
illuminate.
--The IAQ LED indicates when the module is on the
DCV mode.
--The EXH LED indicates when the exhaust fan
contact is closed.
(19.) Remote Minimum Position Control — A
field-installed accessory remote potentiometer shall
allow the outdoor-air damper to be opened or closed
beyond the minimum position in the occupied mode
for modified ventilation.
e. Barometric Relief Damper:
(1.) Package shall include damper, seals, hardware, and
hoods to relieve excess internal pressure.
(2.) Damper shall close due to gravity upon unit
shutdown.
f. 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.
g. 25% Two-Position Damper*:
(1.) Two-position damper package shall include single
blade damper and motor. Admits up to 25% outdoor
air.
(2.) Damper shall close upon indoor fan shutoff.
h. Head Pressure Control Package*:
Control package shall consist of solid-state control and
condenser-coil
temperature
sensor
to
maintain
condensing temperature between 90
_
F and 110
_
F at
outdoor ambient temperatures down to –20
_
F by
50H
JQ
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