Pressure Curves - Trane 4YCC4024E1060A Installation And Operation Manual

Pressure Curves

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 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) DISCHARGE PRESSURE @ 800 CFM CFM IS 333 PSIG.
(5) SUCTION PRESSURE @ 800 CFM CFM IS 141 PSIG.
18-EB40D1-1E-EN
Figure 9. Pressure Curve – 4YCC4024E1
Cooling
INDOOR ENTERING
500
WET BULB CURVES
TOP TO BOTTOM
71, 67, 63 AND 59 DEG
450
400
(3) (3)
(4) (4)
350
300
250
(1)
200
40 60 80
OUTDOOR TEMPERATURE (Degree F)
170 170
INDOOR ENTERING INDOOR ENTERING
165 165
WET BULB CURVES WET BULB CURVES
TOP TO BOTTOM TOP TO BOTTOM
160 160
71, 67, 63 AND 59 71, 67, 63 AND 59
DEG F. DEG F.
155 155
150 150
145 145
140 140
(5) (5)
135 135
130 130
125 125
120 120
115 115
(1) (1)
110 110
40 40 60 60 80 80
OUTDOOR TEMPERATURE (Degree F)
(2)
100 120
(2)
(3)
(3)
100 100 120 120
ACTUAL:
DISCHARGE PRESSURE SHOULD BE +/- 10 PSI OF CHART
SUCTION PRESSURE SHOULD BE +/- 3 PSIG OF CHART
U U n n i i t t S S t t a a r r t t u u p p
Dwg. 4YCC4024E1
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