26
18-BB41D1-1A-EN
Figure 9. 4WCC4030E1
Cooling
Heating
DISCH
AR
G
E PRESSU
RE (PSI
G
)
OUTDOOR TEMPERATURE (Degree F)
SUC
TI
O
N PRES
SUR
E (PSI
G
)
OUTDOOR TEMPERATURE (Degree F)
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, DISCHARGE 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 DISCHARGE OR SUCTION PRESSURE IN LEFT. COLUMN (4).
EXAMPLE: (1) OUTDOOR TEMP. 82 F.
(2) INDOOR WET BULB 67 F.
(3) AT INTERSECTION
ACTUAL:
(4) DISCHARGE PRESSURE @950 CFM CFM IS 332 PSIG.
DISCHARGE PRESSURE SHOULD BE +/- 10 PSI OF CHART
(5) SUCTION PRESSURE @950 CFM CFM IS 147 PSIG.
SUCTION PRESSURE SHOULD BE +/- 3 PSIG OF CHART
DWG.NO. 4WCC4030E1
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.
