Bryant 581J Series Manual page 62

GUIDE SPECIFICATIONS (cont)
c. Shall have inherent thermal overload protection
with an automatic reset feature.
d. Shall use a shaft down design on all sizes.
2. Condenser fans:
a. Shall be a direct driven propeller type fan.
b. Shall have aluminum blades riveted to corro-
sion resistant steel spiders and shall be dynami-
cally balanced.
N. (23 81 19.13.N) Special Features Options and Accesso-
ries
1. 2-Speed Indoor Fan Motor System for 2-stage
cooling models only:
a. Evaporator fan motor:
1) Shall have permanently lubricated bearings.
2) Shall have a maximum continuous bhp rat-
ing for continuous duty operation; no safety
factors above that rating.
3) Shall be Variable Frequency duty and 2-
speed control.
4) Shall contain motor shaft grounding ring to
prevent electrical bearing fluting damage
by safely diverting harmful shaft voltages
and bearing currents to ground.
2. Variable Frequency Drive (VFD). Only available
on 2-speed indoor fan motor option:
a. Factory-supplied VFDs qualify, through ABB
for a 12-month warranty from date of commis-
sioning or 18 months from date of sale, which-
ever occurs first.
b. Shall be installed inside the unit cabinet,
mounted, wired and tested.
c. Shall contain Electromagnetic Interference
(EMI) frequency protection.
d. Insulated Gate Bi-Polar Transistors (IGBT)
used to produce the output pulse width modu-
lated (PWM) waveform, allowing for quiet
motor operation.
e. Self diagnostics with fault and power code LED
indicator. Field accessory Display Kit available
for further diagnostics and special setup appli-
cations.
f. RS485 capability standard.
g. Electronic thermal overload protection.
h. 5% swinging chokes for harmonic reduction
and improved power factor.
i. All printed circuit boards shall be conformal
coated.
3. Integrated EconoMi$er
EconoMi$er X low leak rate models. (Factory-
installed on 3-phase models only. Field installed
on all 3 and 1-phase models):
a. Integrated, gear driven opposing modulating
blade design type capable of simultaneous
economizer and compressor operation.
b. Independent modules for vertical or horizontal
return configuration shall be available. Vertical
62
® IV, EconoMi$er 2, and
return modules shall be available as a factory-
installed option.
c. Damper blades shall be galvanized steel with
composite gears. Plastic or composite blades on
intake or return shall not be acceptable.
d. Shall include all hardware and controls to pro-
vide free cooling with outdoor air when tem-
perature and/or humidity are below setpoints.
e. Shall be equipped with gear driven dampers for
both the outdoor ventilation air and the return
air for positive air stream control.
f. Low leak rate models shall be equipped with
dampers not to exceed 2% leakage at 1 in. wg
pressure differential.
g. Economizer controller on EconoMi$er IV mod-
els shall be Honeywell W7212 that provides:
1) Combined minimum and DCV maximum
damper position potentiometers with com-
pressor staging relay.
2) Functions with solid state analog enthalpy
or dry bulb changeover control sensing.
3) LED indicators for: when free cooling is
available, when module is in DCV mode,
when exhaust fan contact is closed.
h. Economizer controller on EconoMi$er X mod-
els shall be the Honeywell W7220 that pro-
vides:
1) 2-line LCD interface screen for setup,
configuration and troubleshooting.
2) On-board Fault Detection and Diagnostics
(FDD) that senses and alerts when the
economizer is not operating properly, per
California Title 24.
3) Sensor failure loss of communication
identification.
4) Automatic sensor detection.
5) Capabilities for use with multiple-speed
indoor fan systems.
6) Utilize digital sensors: Dry bulb and
Enthalpy.
i. Economizer controller on EconoMi$er 2 mod-
els with PremierLink™ controller shall be 4 to
20 mA design and controlled by the Premier-
Link controller. PremierLink does not comply
with California Title 24 Fault Detection and
Diagnostic (FDD) requirements.
j. Economizer controller on EconoMi$er 2 mod-
els with RTU Open controller shall be a 4 to 20
mA design controlled directly by the RTU Open
controller. RTU Open controller meets Califor-
nia Title 24 Fault Detection and Diagnostic
(FDD) requirements.
k. Shall be capable of introducing up to 100%
outdoor air.
l. Shall be equipped with a barometric relief
damper capable of relieving up to 100% return
air and contain seals that meet ASHRAE 90.1-
2016 and IECC-2015 requirements.