Trane 5TWR4 - Section 19. Pressure Curves

18-BC117D1-1B-EN 27
Section 19. 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
TEM
PERATURE, OUTDOOR TEMPERATURE, DISCHARGE AND SUCTION PRESSURES. ON THE PLOTS LOCATE OUTDOOR TEMPERATURE (1);
LO
CATE INDOOR WET BULB (2); FIND INTERSECTION OF OD TEMP. & ID W.B. (3); READ DISCHARGE OR SUCTION PRESSURE IN LEFT
CO
LUMN (4).
EX
AMPLE: (1) OUTDOOR TEMP. 82 F.
(2
) INDOOR WET BULB 67 F.
(3
) AT INTER
S
E
C
TIOANCTUAL:
(4
) DISCHARGE PRESSURE @ 670 CFM IS 318 PSIG. DISCHARGE PRESSURE SHOULD BE +/- 10 PSI OF CHART
(5) SUCTION PRESSURE @ 670 CFM IS 149 PSIG. SUCTION PRESSURE SHOULD BE +/- 3 PSIG OF CHART
PRESSURE CURVES for 5TWR4018A1
LIQUID PRESSURE (PSIG)
OD Model
Cooling@SCFM
5TWR4018A1 650
OUTDOOR TEMPERATURE(Degree F)
SUCTION PRESSURE (PSIG)
OUTDOOR TEMPERATURE(Degree F)
110
115
120
125
130
135
140
145
150
155
160
165
170
50 60 70 80 90 100 110 120
(1)
170
220
270
320
370
420
470
520
50 60 70 80 90 100 110 120
(1)
(3)
(3)
(5)
(4)
(2)
(2)
INDOOR ENTERING
WETBULBCURVES
TOPTOBOTTOM
71, 67, 63 AND59DEG F.
INDOOR ENTERING
WETBULBCURVES
TOPTOBOTTOM
71, 67, 63 AND59DEG F.