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Accessory Description and Usage (Listed Alphabe tically) -- CONTINUED
10. 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.
11. Outdoor Thermostat
An SPDT temperature--actua ted 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.
12. Secondary Outdoor Thermos tat
An SPDT temperature--actua ted 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.
13. Sound Hood
Wraparound sound reducing cover for the compressor. Reduces
the sound level by about 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.
14. 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:
Accessory required to meet ARI rating and system
reliability, where indoor not equipped.
Required in all heat pump applications designed with
Puron refrigerant.
15. Time--Delay Relay
An SPST delay relay which briefly continues operation of indoor
blower motor to provide additional cooling after the compressor
cycles off.
Note: Most indoor unit controls include this feature. For those
that do not, use the guideline below.
Usage Guideline:
Accessory required to meet ARI rating, where indoor
not equipped.
265A