American Standard 4A7A4018N Installation And Operation Manual page 41

520
470
420
370
(4)
320
270
220
170
40
170
165
160
155
150
145
(5)
140
135
130
125
120
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) IN DOOR WET BULB 67 F.
(3) AT INTERSECTION
(4) LIQUID PRESSURE @ 600 CFM IS 306 PSIG
(5) SUCTION PRESSURE @ 600 CFM IS 142 PSIG
11-AC11D1-9E-EN
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)
OD Model
4A7A4024L1
4A7A4025L1
4A7A4030L1
4A7A4031L1
120
4A7A4036L1
4A7A4037L1
4A7A4036M1
4A7A4037M1
(2)
4A7A4042L1
4A7A4043L1
4A7A4048L1
120
Cooling
@SCFM
800
950
950
950
1100
1050
1100
1050
1300
1250
1400
41