Section 18. Pressure Curves - Trane 4TTR3 Installation And Operation Manual

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) IN DOOR WET BULB 67 F.
( ) 3 A T N I T E R S E C T O I
( ) 4 L Q I U D I P R E S S U R
( ) 5 S U C T O I N P R E S S
520
INDOOR ENTERING
WET BULB CURVES
470
TOP TO BOTTOM
71, 67, 63 AND 59 DEG F.
420
370
320 (4)
270
220
170
40 50 60
OUTDOOR TEMPERATURE (Degree F)
520
INDOOR ENTERING
WET BULB CURVES
470
TOP TO BOTTOM
71, 67, 63 AND 59 DEG F.
420
370
(4)
320
270
220
170
40 50 60
OUTDOOR TEMPERATURE (Degree F)
18-AC79D1-10E-EN
N
E @ 6 0 0 C F M S I 3 0 4 P S G I
U R E @ 6 0 0 C F M S I 1 4 5 P S G I
PRESSURE CURVES (Refer below table for models)
(3)
(1)
70 80 90 100 110
PRESSURE CURVES (Refer below table for models)
(3)
(1)
70 80 90 100 110
A C T U A : L
L Q I U D I P R E S
S U C T O I N P R
170.0
INDOOR ENTERING
165.0
WET BULB CURVES
(2)
TOP TO BOTTOM
160.0
71, 67, 63 AND 59 DEG F.
155.0
150.0
(5)
145.0
140.0
135.0
130.0
125.0
120.0
115.0
110.0
40 50
120
OUTDOOR TEMPERATURE (Degree F)
170
INDOOR ENTERING
165
WET BULB CURVES
(2) TOP TO BOTTOM
160
71, 67, 63 AND 59 DEG F.
155
150
145 (5)
140
135
130
125
120
115
110
40 50
120
OUTDOOR TEMPERATURE (Degree F)
S U R E S H O U L D B E + - / 1 0 P I S O F
E S S U R E S H O U L D B E + - / 3 P S G I
(3)
(1)
60 70 80 90 100
OD Model
4TTR3018N1
4TTR3024N1
(3)
(1)
60 70 80 90
OD Model
4TTR3030N1
4TTR3036N1
4TTR3042N1
4TTR3048N1
4TTR3060N1
C H A R T
O F C H A R T
71
(2)
67
63
59
110 120
Cooling
@SCFM
600
800
71
(2)
67
63
59
100 110 120
Cooling
@SCFM
950
1000
1300
1400
1600
21