Trane 4TTX7, Installation And Operation Manual

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32 18-AC125D1-1A-EN
PRESSURE CURVES FOR 4TTX7036E1
FIRST STAGE SECOND STAGE
TAM7A0C36H31 TAM7A0C36H31
Cooling with Thermal Expansion Valve Cooling with Thermal 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 EXAMPLE: SECOND STAGE
(1) OUTDOOR TEMP. 82 F. (1) OUTDOOR TEMP. 82 F.
(2) INDOOR WET BULB 67 F. (2) INDOOR WET BULB 67 F.
(3) AT INTERSECTION (3) AT INTERSECTION
(4) LIQUID PRESSURE @ 780 CFM IS 307 PSIG (4) LIQUID PRESSURE @ 1050 CFM IS 287 PSIG
(5) SUCTION PRESSURE @ 780 CFM IS 141 PSIG (5) SUCTION PRESSURE @ 1050 CFM IS 147 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. 4TTX7036E1
125
135
145
155
165
40 50 60 70 80 90 100 110 120
125
135
145
155
165
40 50 60 70 80 90 100 110 120
150
200
250
300
350
400
450
500
40 50 60 70 80 90 100 110 120
150
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
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.
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)