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Accessory Description and Usage (Listed Alphabetically) -- CONTINUED
11. Outdoor Air Temperature Sensor
Designed for use with Bryant Thermostats listed in this
publication. This device enables the thermostat to display the
outdoor temperature. This device also is required to enable
special thermostat features such as auxiliary heat lock out.
Usage Guideline:
Suggested for all Bryant thermostats listed in this
publication.
12. Outdoor Thermostat
An SPDT temperature--actuated switch which turns on
supplemental electric heaters when outdoor air temperature drops
below a user--selected set point.
Usage Guideline:
Electric supplemental heat applications in non--variable
speed indoor units when electric heat staging is desired.
Usage Guideline:
Some local codes may require limiting the heating head
pressure in the vapor line in some applications.
13. Secondary Outdoor Thermostat
An SPDT temperature--actuated switch which turns on
third --stage of supplemental electric heaters when outdoor air
temperature drops below the second--stage set point.
Usage Guideline:
Outdoor thermostat applications where electric heater is
capable of 3--stage operation.
14. Sound Hood
Wraparound sound reducing cover for the compressor. Reduces
the sound level up to 2 dBA.
Usage Guideline:
Suggested when unit is installed closer than 15 ft to
quiet areas, bedrooms, etc.
Suggested when unit is installed between two houses less
than 10 ft apart.
Usage Guideline:
Suggested in the following applications:
Heat pump installations in heavy snowfall areas.
Heat pump installations in snowdrift locations.
Heat pump installations in areas of prolonged
subfreezing temperatures.
All commercial installations.
15. Thermostatic Expansion Valve (TXV) Bi--Flow
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.
Usage Guideline:
Required in all heat pump applications
16. Time--Delay Relay
An SPST delay relay which briefly continues operation of indoor
blower motor to provide additional cooling after the compressor
cycles of f.
Note: Most indoor unit controls include this feature. For those
that do not, use the guideline below.
Usage Guideline:
213R