Pressure Curves - Trane 4TTL5024N1000A 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, 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.
(3) AT INTERSECTION
(4) LIQUID PRESSURE @ 600 CFM IS 293 PSIG
(5) SUCTION PRESSURE @ 600 CFM IS 138 PSIG
18-AC126D1-1A-EN
Figure 8. 2.0 and 2.5 Ton Models
PRESSURE CURVES (Refer below table for models)
520
INDOOR ENTERING
WET BULB CURVES
470
TOP TO BOTTOM
71, 67, 63 AND 59 DEG F.
420
370
320
(4)
270
220
170
50 60 70
OUTDOOR TEMPERATURE (Degree F)
170
INDOOR ENTERING
165
WET BULB CURVES
TOP TO BOTTOM
160
71, 67, 63 AND 59 DEG F.
155
150
145
(5)
140
135
130
125
120
115
50 60 70
OUTDOOR TEMPERATURE (Degree F)
(3)
(1)
80 90 100 110
(3)
(1)
80 90 100 110
ACTUAL:
LIQUID PRESSURE SHOULD BE +/- 10 PSI OF CHART
SUCTION PRESSURE SHOULD BE +/- 3 PSIG OF CHART
(2)
120
OD Model
4TTL5024N1
4TTL5030N1
71
(2)
67
63
59
120
Cooling
@SCFM
850
850
31