Trane Technologies 4TWV8049A1000B - Pressure Curves - 4 TTV8037 A; 4 TTV8037 A Cooling Pressure Curves

4T-V8-SF-1M-EN
67
Figure 28. 4TTV8037A
TAM8C0C36V31
Cooling with Electronic Expansion Valve
LIQUID PRESSURE (PSIG)
OUTDOOR TEMPERATURE (Degree F)
SUCTION PRESSURE (PSIG)
OUTDOOR TEMPERATURE (Degree F)
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: FIRST STAGE
(1) OUTDOOR TEMP. 82 F.
(2) INDOOR WET BULB 67 F.
(3) AT INTERSECTION
(4) LIQUID PRESSURE @ 400 CFM IS 295 PSIG
(5) SUCTION PRESSURE @ 1050 CFM IS 141 PSIG
INTERCONNECTING LINES
ACTUAL:
GAS - 3/4" O.D.
LIQUID PRESSURE SHOULD BE +/- 10 PSI OF CHART
LIQUID - 3/8" O.D.
SUCTION PRESSURE SHOULD BE +/- 3 PSIG OF CHART
DWG.NO. 4TTV8037A1
110
120
130
140
150
160
170
180
40 50 60 70 80 90 100 110 120
200
250
300
350
400
450
500
40 50 60 70 80 90 100 110 120
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.
(2)
(1)
(4)
(3)
(2)
(1)
(3)
(5)
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