Bryant 533A (60 Hz User Manual page 7

ACCESSORY DESCRIPTION AND USAGE (Listed Alphabetically) Continued
9. Liquid-Line Solenoid Valve (LSV)
An electrically operated shutoff valve to be installed at the outdoor or indoor unit (depending on tubing configuration) and which stops and starts refrigerant
liquid flow in response to compressor operation. Maintains a column of refrigerant liquid ready for action at next compressor operation cycle.
NOTE: Compressor Start Assist—Capacitor/Relay Type must also be used. Do not use with hard shutoff TXV.
SUGGESTED USE: For improved system performance in air conditioners for certain combinations of indoor and outdoor units. Refer to ARI Unitary Directory.
In certain long-line applications. Refer to Residential Split System Long-Line Application Guideline and Service Manual.
10. Low-Ambient Controller
Head pressure controller is a cycle control device activated by a temperature sensor mounted on a header tube of the outdoor coil. It is designed to cycle
the outdoor fan motor in order to maintain condensing temperature within normal operating limits (approximately100°F/37.8°C high and 60°F/15.5°C low).
The control will maintain working head pressure at low-ambient temperatures down to 0°F(–17.8°C) when properly installed.
SUGGESTED USE: Cooling operation at outdoor temperatures below 55°F (12.8°C).
11. Low-Ambient Pressure Switch
A long life pressure switch which is mounted to outdoor unit service valve. It is designed to cycle the outdoor fan motor in order to maintain head pressure
within normal operating limits (approximately 200 psig to 365 psig). The control will maintain working head pressure at low-ambient temperatures down to
0°F (–17.8°C) when properly installed.
SUGGESTED USE: Cooling operation at outdoor temperatures below 55°F (12.8°C).
12. MotorMaster® Control
A fan speed control device activated by a temperature sensor. Designed to control condenser fan motor speed in response to the saturated, condensing
temperature during operation in cooling mode only. For outdoor temperatures down to –20°F (–28.9°C), it maintains condensing temperature at
100°F ± 10°F (37.8°C ± 5.6°C).
SUGGESTED USE: Cooling operation at outdoor temperatures below 55°F (12.8°C).
All commercial installations.
13. Outdoor Air Temperature Sensor
A device that allows the temperature at a remote location (outdoors) to be displayed at the thermostat.
SUGGESTED USE: All Bryant programmable thermostats.
14. Piston Body
This piston body is to be used as a replacement for the FK4C Fan Coil R-22 thermostatic expansion valve when used with Puron® (R-410A) air conditioner
units. Use piston and piston ring shipped with outdoor unit for installations under 50 ft.
SUGGESTED USE: All Puron® air conditioner installations matched with FK4C Fan Coils.
15. Support Feet
Four stick-on plastic feet which raise the unit 4 in. above the mounting pad. This allows sand, dirt, and other debris to be flushed from the unit base,
minimizing corrosion.
SUGGESTED USE: For improved sound ratings.
Coastal installations.
Windy areas or where debris is normally circulating.
Rooftop installations.
16. Thermostatic Expansion Valve (TXV)
A modulating flow-control valve which meters refrigerant liquid flow rate into the evaporator in response to the superheat of the refrigerant gas leaving the
evaporator. Kit includes valve, adapter tubes, and external equalizer tube. Hard shutoff valves are available. Do not use with Liquid-Line Solenoid Valve.
NOTE: Compressor Start Assist—Capacitor/Relay Type must also be used. Do not use with Liquid Line Solenoid.
SUGGESTED USE: For improved system performance in cooling mode for certain combinations of indoor and outdoor units. Refer to ARI Unitary Directory.
Required for use on all zoning systems.
17. Time-Delay Relay
An SPST delay relay which briefly continues operation of the indoor blower motor to provide additional cooling after the compressor cycles off.
SUGGESTED USE: For improved efficiency ratings for certain combinations of indoor and outdoor units. Refer to ARI Unitary Directory.
Required for use on all zoning systems.
18. Winter Start Control
An SPST delay relay which bypasses the low-pressure switch for approximately 3 minutes to permit start-up for cooling operation under low-load
conditions.
SUGGESTED USE: All air conditioners where Low-Ambient Controller has been added.
UNIT
SIZE
024 49.0
030 49.5
036 57.5
042 54.0
048 57.0
060 70.5
Not listed in ARI; however, tested in accordance with ARI Standard 270-95.
SOUND POWER (dBA)
OCTAVE BAND CENTER FREQUENCY (Hz)
125 250
58.5
62.5
63.5
67.5
70.5
72.5
SOUND POWER (dBA)
UNIT SIZE
024
030
036
042
048
060
500 1000
65.0 72.0
68.5 72.5
68.0 75.0
68.5 72.5
73.5 75.5
72.5 75.0
W/SOUND BLANKET
74
75
76
77
78
78
—7—
2000 4000
66.4 62.0
67.5 62.5
71.0 65.5
71.5 64.0
73.0 69.5
69.5 65.5
W/O SOUND BLANKET
76
77
79
79
80
80
8000
57.5
56.0
58.5
60.0
64.0
61.5