Carrier WEATHERMASTER 50HJQ016, Product Data

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K. Motors:
1. Compressor motors shall be cooled by refriger-
ant passing through motor windings and shall
have line break thermal and current overload
protection.
2. Indoor blower motor shall have permanently
lubricated bearings and inherent automatic-
reset thermal 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 fea-
tures designated by * are specified. For assistance in
amending 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 Carrier Comfort Network®
(CCN) and ComfortVIEW™ software.
c. Shall be compatible with Comfort Link™
controllers.
d. Shall be ASHRAE 62-99 compliant.
e. Shall accept a CO
2
sensor in the conditioned
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 an integrated economizer
controller.
2. 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.
* 3. Integrated Economizers:
a. Integrated integral modulating type capable
of simultaneous economizer and compressor
operation. During economizer operation, up
to two compressors on sizes 008-014 will
operate.
b. Available as a factory-installed option in ver-
tical supply/return configuration only. (Avail-
able as a field-installed accessory for
dedicated horizontal and/or vertical supply
return configurations.)
c. Includes all hardware and controls to provide
cooling with outdoor air.
d. Equipped with low-leakage dampers, not to
exceed 2% leakage at 1 in. wg pressure
differential.
e. Capable of introducing up to 100% outdoor
air.
f. EconoMi$er IV and EconoMi$er2 shall be
equipped with a barometric relief damper
capable of relieving up to 100% return air.
g. Designed to close damper(s) during loss-of-
power situations with spring return built into
motor.
h. 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$er IV,
the return air sensor, indoor enthalpy sensor,
and outdoor enthalpy sensor shall be pro-
vided as field-installed accessories to provide
enthalpy control, differential enthalpy con-
trol, and differential dry bulb temperature
control. For the EconoMi$er2, the enthalpy,
differential temperature (adjustable), and dif-
ferential enthalpy control shall be provided
as field-installed accessories.
i. The EconoMi$er IV and EconoMi$er2 shall
have a gear-driven parallel blade design.
j. EconoMi$er IV microprocessor control shall
provide control of internal building pressure
through its accessory power exhaust func-
tion. Factory set at 100%, with a range of
0% to 100%.
k. EconoMi$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).
l. EconoMi$er IV Microprocessor Occupied
Minimum Damper Position Setting main-
tains the minimum airflow into the building
during occupied period providing design
ventilation rate for full occupancy (damper
position during heating). A remote potenti-
ometer may be used to override the set
point.
m. EconoMi$er IV Microprocessor Unoccupied
Minimum Damper Position Setting — The
EconoMi$er IV damper shall be completely
closed when the unit is in the occupied
mode.
n. EconoMi$er IV Microprocessor IAQ/DCV
Maximum Damper Position Setting — Set-
ting the maximum position of the damper
prevents the introduction of large amounts
of hot or cold air into the space. This posi-
tion is intended to satisfy the base minimum
ventilation rate.
o. 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.
p. Compressor lockout sensor (opens at 35 F,
closes at 50 F).
q. Actuator shall be direct coupled to economizer
gear, eliminating linkage arms and rods.
Guide specifications — 50TFQ004-012 (cont)
50
TF
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