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Figure 12. 4WCC4048E1
Cooling Heating
DISCHARGE PRESSURE (PSIG)
OUTDOOR TEMPERATURE (Degree F)
SUCTION PRESSURE (PSIG)
EXAMPLE: (1) OUTDOOR TEMP. 82 F.
(2) INDOOR WET BULB 67 F.
(3) AT INTERSECTION ACTUAL:
(4) DISCHARGEPRESSURE@1600 CFM CFM IS 328 PSIG. DISCHARGEPRESSURESHOULD BE+/- 10 PSI OFCHART
(5) SUCTION PRESSURE@1600 CFM CFM IS 139 PSIG. SUCTION PRESSURE SHOULD BE+/- 3 PSIGOFCHART
DWG.NO. 4WCC4048E1
110
115
120
125
130
135
140
145
150
155
160
165
170
40 60 80 100 120
200
250
300
350
400
450
500
40 60 80 100 120
(1)
(1)
(3)
(3)
(5)
(4)
(2)
(2)
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM
71, 67, 63 AND 59 DEG
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM
71, 67, 63 AND 59
30
40
50
60
70
80
90
100
110
120
130
140
-5 5 15 25 35 45 55 65
200
225
250
275
300
325
350
375
400
425
450
475
500
-5 5 15 25 35 45 55 65
INDOOR ENTERING
DRY BULB CURVES
TOP TO BOTTOM
80, 70, AND 60 DEG F.
INDOOR ENTERING
DRY BULB CURVES
TOP TO BOTTOM
80, 70, AND 60 DEG F.
OUTDOOR TEMPERATURE (Degree F)
COOLINGPERFORMANCE CAN BECHECKED WHEN THEOUTDOOR TEMP IS ABOVE65 DEGF.
TOCHECK COOLINGPERFORMANCE, SELECT THE PROPER INDOOR CFM, ALLOW PRESSURES TO STABILIZE.
MEASURE INDOOR WET BULB. TEMPERATURE, OUTDOOR TEMPERATURE, DISCHARGEAND SUCTION PRESSURES.
ON THEPLOTS LOCATE OUTDOOR TEMPERATURE (1); LOCATE INDOOR WET BULB (2);
FIND INTERSECTION OF OD TEMP. & ID W.B. (3); READ DISCHARGEOR SUCTION PRESSUREIN LEFT COLUMN (4).
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