30
18-EB41D1-1A-EN
Figure 10.
Pressure Curves for 4YCZ5036E
FIRST STAGE
SECOND STAGE
830 SCFM
1175 SCFM
L
IQ
U
ID
P
R
E
S
S
U
R
E
(
P
S
IG
)
OUTDOOR TEMPERATURE (Degree F)
S
U
C
T
IO
N
P
R
E
S
S
U
R
E
(
P
S
IG
)
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, 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: FIRST STAGE
EXAMPLE: SECOND STAGE
(1) OUTDOOR TEMP. 82 F.
(1) OUTDOOR TEMP. 82 F.
(2) INDOOR WET BULB 67 F.
(2) INDOOR WET BULB 67 F.
(3) AT INTERSECTION
(3) AT INTERSECTION
(4) LIQUID PRESSURE @ 830 CFM IS 288 PSIG
(4) LIQUID PRESSURE @ 1175 CFM IS 312 PSIG
(5) SUCTION PRESSURE @ 830 CFM IS 149 PSIG
(5) SUCTION PRESSURE @ 1175 CFM IS 144 PSIG
ACTUAL:
LIQUID PRESSURE SHOULD BE +/- 10 PSI OF CHART
SUCTION PRESSURE SHOULD BE +/- 3 PSIG OF CHART
DWG.NO.
4YCZ5036E
120
130
140
150
160
170
180
190
40
50
60
70
80
90
100
110
120
120
130
140
150
160
170
180
190
40
50
60
70
80
90
100
110
120
200
250
300
350
400
450
500
40
50
60
70
80
90
100
110
120
200
250
300
350
400
450
500
40
50
60
70
80
90
100
110
120
(1)
(1)
(3)
(3)
(5)
(4)
(2)
(2)
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM 71,
67, 63 AND 59 DEG F.
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM 71,
67, 63 AND 59 DEG F.
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM 71,
67, 63 AND 59 DEG F.
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM 71,
67, 63 AND 59 DEG F.
(2)
(1)
(4)
(3)
(2)
(1)
(3)
(5)
