—7—
ACCESSORY DESCRIPTION AND USAGE (Listed Alphabetically) Continued
10.
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).
11.
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.
12.
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.
13.
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.
14.
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.
15.
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.
16.
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.
17.
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.
SOUND POWER (dBA) (A-WTD, WITHOUT PURE TONE PENALTY)
UNIT
SIZE
SOUND
LEVEL
(dBA)
OCTAVE BAND CENTER FREQUENCY (Hz)
125
250
500
1000
2000
4000
8000
018
74
52.0
63.5
65.5
69.0
64.5
58.0
51.0
024
74
57.5
64.0
67.5
68.5
66.0
60.5
53.0
030
75
58.5
66.0
69.0
69.0
66.0
61.0
53.5
036
77
61.0
67.5
71.0
71.5
70.0
67.0
58.0
042
77
61.0
67.0
68.5
66.5
63.5
56.5
51.5
048
78
61.5
68.0
71.5
72.0
68.5
65.5
60.0
060
78
61.5
65.5
69.0
69.5
65.0
64.0
56.0
Содержание 591B
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