Pressure Curves - Trane 4DCZ5024F1060A Installation And Operation Manual

U U n n i i t t S S t t a a r r t t u u p p

Pressure Curves

Cooling with Thermal Expansion Valve
INDOOR ENTERING DRY BULB CURVES TOP TO BOTTOM
71, 67, 63 AND 59 DEG F.
5 5 5 5 5 5 550 5 5
2ND STAGE
5 5 5 5 5 0 500 5
450 4 4 5 4 4
4 4 0 4 4 400
3 3 3 3 3 350 3 5 5
300 3 3 0 3 3
25 250
20 200
40 60 80
INDOOR ENTERING DRY BULB CURVES TOP TO BOTTOM
185 18 8
175 17 7
2ND STAGE
1 165 1 6 6
15 155 5
1 1 145 4 4
13 135 3
12 125 2
115
40 60 80
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 DISCHARGE OR SUCTION PRESSURE IN LEFT
COLUMN (4).
EXAMPLE: (1) OUTDOOR TEMP. 82 F.
(2) INDOOR WET BULB 67 F.
(3) AT INTERSECTION
(4) DISCHARGE PRESSURE @ 600 CFM IS 297 PSIG
(5) SUCTION PRESSURE @ 600 CFM IS 153 PSIG.
32
Figure 9. Pressure Curves for 4DCZ5024F
550
1ST STAGE
500
450
400
350
(3)
(4)
300
250
(1)
200
40 60 80
100 120
OUTDOOR TEMPERATURE (Degree F)
185
71, 67, 63 AND 59 DEG F.
175
1ST STAGE
165
155
(3)
(5)
145
135
125
(1)
115
100 120
40 60 80
OUTDOOR TEMPERATURE (Degree F)
Heating with Thermal Expansion Valve
INDOOR ENTERING DRY BULB CURVES TOP TO BOTTOM
500
2ND STAGE
450
(2)
400
350
300
250
200
100 120
-5 5 15 25 35 45 55 65
INDOOR ENTERING DRY BULB CURVES TOP TO BOTTOM
160
150
2ND STAGE
140
130
(2)
120
110
100
90
80
70
60
50
40
100 120
-5 5 15 25 35 45 55 65
ACTUAL:
DISCHARGE PRESSURE SHOULD BE +/- 10 PSI OF CHART
SUCTION PRESSURE SHOULD BE +/- 3 PSIG OF CHART
80, 70, AND 60 DEG F.
500
1ST STAGE
450
400
350
300
250
200
-5 5 15 25 35 45 55 65
160
80, 70, AND 60 DEG F.
150
1ST STAGE
140
130
120
110
100
90
80
70
60
50
40
-5 5 15 25 35 45 55 65
DWG.NO. 4DCZ5024F
18-BG07D1-1B-EN