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550
500
450
400
(4)
350
300
250
200
40
170
165
160
155
150
145
(5)
140
135
130
125
120
115
110
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 334 PSIG
(5) SUCTION PRESSURE @ 600 CFM IS 139 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
90
100
110
ACTUAL:
LIQUID PRESSURE SHOULD BE +/- 10 PSI OF CHART
SUCTION PRESSURE SHOULD BE +/- 3 PSIG OF CHART
(2)
OD Model
120
A4AC3030A1
A4AC3036A1
A4AC3042A1
(2)
120
88-A4AC3001-1J-EN
Cooling
@SCFM
950
1100
1250
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