Trane 5TTR4018A - Section 18. Pressure Curves

18-AC128D1-1B-EN 23
Section 18. 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, 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: (1) OUTDOOR TEMP. 82 F.
(2) INDOOR WET BULB 67 F.
:LAUTCANOITCESRETNI TA )3(
TRAHC FO ISP 01 -/+ EB DLUOHS ERUSSERP DIUQILGISP 403 SI
MFC 006 @ ERUSSERP DIUQIL )4(
TRAHC FO GISP 3 -/+ EB DLUOHS ERUSSERP NOITCUSGISP 54
1 SI MFC 006 @ ERUSSERP NOITCUS )5(
PRESSURE CURVES (Refer below table for models)
LIQUID PRESSURE (PSIG)
OUTDOOR TEMPERATURE (Degree F)
SUCTION PRESSURE (PSIG)
OUTDOOR TEMPERATURE (Degree F)
110
115
120
125
130
135
140
145
150
155
160
165
170
40 50 60 70 80 90 100 110 120
170
220
270
320
370
420
470
520
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.
OD Model
5TTR4018A1
Cooling
@SCFM
600
71
67
63
59