USE OM - JANUARY 2017
74
7.6.4.9.1
For other refrigerants, the pressure of the closed duct test shall be within
0.3°F saturation temperature of the FA test.
7.6.4.10
Pressure variation for both high side and low side shall be in the same direction, e.g.
if high side pressure is higher in close duct test, low side pressures are not permitted to be lower than
close duct test (when rounded to closest 0.1 psig).
7.6.4.11
Refrigerant tube temperatures measured per Section 7.6.1.4 shall be within 0.5°F of
the FA test.
7.6.4.12
Measured indoor air enthalpy capacity shall be within 2.0% of the FA test.
7.6.4.13
Absolute value of HB shall be within 6.0%.
7.6.4.14
Outdoor duct static pressure during this closed duct test shall be recorded with all
other parameters, including average, minimum and maximum.
7.6.5
All other tests in each operational mode may be made with the outdoor duct remaining connected to
the Outdoor Unit as long as the same average outdoor duct static pressure recorded per Section 7.6.3.14 is
maintained, within ±0.01 in.H
2
O. Additionally, the total observed range (maximum value minus the minimum value)
for each additional test may be no greater than the total observed range of the previous closed duct test.
7.6.5.1
It is preferred, but not required, that both FA and closed duct tests be performed for
every steady state test.
