American Standard 4A7A4018N Installation And Operation Manual page 40

520
470
420
370
(4)
320
270
220
170
40
180
175
170
165
160
155
(5)
150
145
140
135
130
125
50
COOLING PERFORMANCE CAN BE CHECKED WHEN THE OUTDOOR TEMP IS ABOVE 65 DEG F.
TO CHECK COOLING PERFORMANCE, SELECT THE PROPER INDOOR CFM, ALLOW PRESSURES TO STABILIZE. MEASURE INDOOR WET BULB
TEMPERATURE, OUTDOOR TEMPERATURE, LIQUID AND SUCTION PRESSURES. ON THE PLOTS LOCATE OUTDOOR TEMPERATURE (1);
LOCATE INDOOR WET BULB (2); FIND INTERSECTION OF OD TEMP. & ID W.B. (3); READ LIQUID (4) OR SUCTION (5) PRESSURE IN LEFT COLUMN.
EXAMPLE: (1) OUTDOOR TEMP. 82 F.
(2) INDOOR WET BULB 67 F.
(3) AT INTERSECTION
(4) LIQUID PRESSURE @ 600 CFM IS 313 PSIG
(5) SUCTION PRESSURE @ 600 CFM IS 148 PSIG
40
PRESSURE CURVES (Refer below table for models)
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM
71, 67, 63 AND 59 DEG F.
50 60 70
OUTDOOR TEMPERATURE (Degree F)
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM
71, 67, 63 AND 59 DEG F.
(3)
60 70 80
OUTDOOR TEMPERATURE (Degree F)
(3)
(1)
80 90 100 110
71
67
63
59
(1)
90 100 110
ACTUAL:
LIQUID PRESSURE SHOULD BE +/- 10 PSI OF CHART
SUCTION PRESSURE SHOULD BE +/- 3 PSIG OF CHART
(2)
120
OD Model
4A7A4018L1
(2)
120
11-AC11D1-9E-EN
Cooling
@SCFM
600