Trane 4TTX7 - 4 TTX7048 E1 Cooling Performance Curves (First Stage); 4 TTX7048 E1 Cooling Performance Curves (Second Stage)

18-AC125D1-1A-EN 33
PRESSURE CURVES FOR 4TTX7048E1
FIRSTSTAGE SECOND STAGE
TAM7A0C48H41 TAM7A0C48H41
CoolingwithThermal ExpansionValve CoolingwithThermal ExpansionValve
LIQUID PRESSURE (PSIG)
OUTDOOR TEMPERATURE(Degree F)
SUCTION PRESSURE (PSIG)
OUTDOOR TEMPERATURE(Degree F)
COOLING PERFORMANCE CAN BE CHECKEDWHENTHE OUTDOOR TEMP IS ABOVE65DEG F.
TO CHECK COOLING PERFORMANCE, SELECT THEPROPER INDOOR CFM, ALLOWPRESSURESTO STABILIZE. MEASURE INDOOR WETBULB
TEMPERATURE, OUTDOORTEMPERATURE, LIQUID ANDSUCTION PRESSURES. ON THEPLOTS LOCATE OUTDOORTEMPERATURE (1);
LOCATE INDOOR WETBULB(2); FIND INTERSECTION OF OD TEMP. & ID W.B. (3); READ LIQUID (4) OR SUCTION(5) PRESSURE IN LEFT COLUMN.
EXAMPLE: FIRSTSTAGE EXAMPLE: SECONDSTAGE
(1) OUTDOORTEMP. 82 F. (1) OUTDOORTEMP. 82 F.
(2) INDOOR WETBULB67F. (2) INDOOR WETBULB67F.
(3)AT INTERSECTION (3)AT INTERSECTION
(4)LIQUID PRESSURE @ 1050 CFM IS 311 PSIG (4)LIQUIDPRESSURE @1400CFM IS 292PSIG
(5)SUCTION PRESSURE @ 1050 CFM IS 141 PSIG (5)SUCTION PRESSURE@1400 CFM IS 146PSIG
INTERCONNECTINGLINES
ACTUAL:
GAS-7/8" O.D.
LIQUID PRESSURE SHOULD BE +/-10PSI OF CHART
LIQUID -3/8"O.D.
SUCTIONPRESSURE SHOULD BE +/-3PSIG OF CHART
DWG.NO.4TTX7048E1
110
120
130
140
150
160
170
180
40 50 60 70 80 90 100 110 120
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
200
250
300
350
400
450
500
40 50 60 70 80 90 100 110 120
(1)
(1)
(3)
(3)
(5)
(4)
(2)
(2)
INDOOR ENTERING
WETBULB CURVES
TOPTOBOTTOM71,
67, 63 AND59DEG F.
INDOOR ENTERING
WETBULBCURVES
TOPTOBOTTOM 71,
67, 63 AND59DEG F.
INDOOR ENTERING
WETBULB CURVES
TOPTOBOTTOM71,
67, 63 AND59DEG F.
INDOOR ENTERING
WETBULBCURVES
TOPTOBOTTOM 71,
67, 63 AND59DEG F.
(2)
(1)
(4)
(3)
(2)
(1)
(3)
(5)