Weather-Rite TT Series, Инструкция по установке, эксплуатации и обслуживанию

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SECTION 21: T
EMPERATURE
C
ONTROLS
105 of 198
FIGURE 8 6: Series 14 Components
21.1.2 System Components For Series 44
• Space Temperature Sensors / Selectors
These are com b ined temperat u re sensing /
selection de v ices u sed to control the space to the
temperat u re desired d u ring heating operations. It
is generally located on the co v er of the remote
panel and is field w ired b ack to the amplifier.
• Dischar g e Sensor
This is a thermistor sensor mo u nted in a mixing or
a v eraging t ub e. It monitors the temperat u re of the
air b eing deli v ered into the discharge d u ct.
Resistance decreases as its temperat u re
increases. The sensor is located s u ch that the
a v eraging t ub e protr u des into the discharge d u ct.
NOTE : This is a field-installed de v ice and location
is critical. Make s u re this sensor in mo u nted in the
area of d u ct w ork that has the most amo u nt of air
mo v ing thro u gh it. Recommended distance from
air handler is 6 to 16 feet.
• Amplifier
This is a solid state control that recei v es its inp u t
signal from the temperat u re selectors and
discharge sensor. From this it prod u ces the
control v oltage signal that is sent to the metering
v al v e to control the discharge temperat u re of the
u nit. This amplifier also determines the minim u m
and maxim u m discharge temperat u re. The
amplifier is po w ered b y a 24 V AC step do w n
transformer.
FIGURE 8 7: Series 44 Components