
12
WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.F
ELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.COM WWW.FIELDPIECE.C
Tests
1.1
Target Evaporator Exit Temperature
For given return plenum air conditions, Target
Evaporator Exit Temperature gives you an indication of
the proper indoor air ow. is test can be easily per-
formed simultaneously with superheat or subcooling
tests.
If actual evaporator exit temperature is more than
3°F above or below the Target Evaporator Exit Tempera-
ture, an air ow problem may exist. Ensure that lters are
clear, dampers are adjusted properly and the fan speed
is set correctly if it can be varied. e Target Evapora-
tor Exit Temperature switch position uses the table from
California Title 24.
Direction
of Air ow
A-Coil
Filter
Fan
Dry Bulb and
Wet Bulb T/C
Dry Bulb T/C
Supply Plenum
WWW
FIELDPIECE
C
W
Figure 3. Setting up the ATH4 and
HVAC Guide
TM
tester to measure dry
bulb and wet bulb temperatures
between fi lter and coil.
Komentáře k této Příručce