Rheem RKNL-B073CL15E, Руководство пользователя

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Air
Mechanical Specifications
RKNL-B Series
67
23 81 19.13.M. Evaporator Fan and Motor
1. Evaporator fan motor:
a. Shall have permanently lubricated bearings
b. Shall have inherent automatic-reset thermal overload protection.
c. Shall have a maximum continuous bhp rating for continuous duty operation; no safety factors above that rating shall be
required.
2. Belt-driven Evaporator Fan:
a. Belt drive shall include an adjustable-pitch motor pulley.
b. Shall use sealed, permanently lubricated ball-bearing type.
c. Blower fan shall be double-inlet type with forward-curved blades.
d. Shall be constructed from steel with a corrosion resistant finish and dynamically balanced.
23 81 19.13.N. Condenser Fans and Motors
1. Condenser fan motors:
a. Shall be a totally enclosed motor.
b. Shall use permanently lubricated bearings.
c. Shall have inherent thermal overload protection with an automatic reset feature.
d. Shall use a shaft-down design. Shaft-up designs including those with “rain-slinger devices” shall not be allowed.
2. Condenser Fans shall:
a. Shall be a direct-driven propeller type fan
b. Shall have aluminum blades riveted to corrosion-resistant steel spiders nd shall be dynamically balanced.
23 81 19.13.O. Special Features
1. Integrated Economizers:
a. Integrated, gear-driven parallel modulating blade design type capable of simultaneous economizer and compressor
operation.
b. Independent modules for vertical or horizontal return configurations shall be available. Vertical return modules shall be
available as a factory installed option.
c. Damper blades shall be galvanized steel with metal gears. Plastic or composite blades on intake or return shall not be
acceptable.
d. Shall include all hardware and controls to provide free cooling with outdoor air when temperature 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. Shall be equipped with low-leakage dampers, not to exceed 2% leakage at 1 in. wg pressure differential.
g. Shall be capable of introducing up to 100% outdoor air.
h. Shall be equipped with a barometric relief damper capable of relieving up to 100% return air.
i. Shall be designed to close damper(s) during loss-of-power situations with spring return built into motor.
j. Enthalpy sensor shall be provided as standard. Outdoor air sensor set point shall be adjustable and shall range from 40 to
100°F / 4 to 38°C. Additional sensor options shall be available as accessories.
k. The economizer controller shall also provide control of an accessory power exhaust unit function. Factory set at 70%, with
a range of 0% to 100%.
l. The economizer shall maintain minimum airflow into the building during occupied period and provide design ventilation
rate for full occupancy. A remote potentiometer may be used to override the damper set point.
m. Dampers shall be completely closed when the unit is in the unoccupied mode.
n. Economizer controller shall accept a 2-10Vdc CO2 sensor input for IAQ/DCV control. In this mode, dampers shall modu-
late the outdoor-air damper to provide ventilation based on the sensor input.
o. Actuator shall be direct coupled to economizer gear. No linkage arms or control rods shall be acceptable.
p. Economizer controller shall provide indications when in free cooling mode, in the DCV mode, or the exhaust fan contact is
closed.
q. Economizer wire harness will have provision for smoke detector.
2. Manual damper
a. Manual damper package shall consist of damper, air inlet screen, and rain hood which can be preset to admit up to 50%
outdoor air for year round ventilation.