Trane 4TWL9048A1000A - Pressure Curves for Performance Checking; Cooling and Heating Pressure Curves; Cooling Performance Checking Guide

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4TWL9048A-SF-1C-EN
Pressure Curves
II mmppoorrttaanntt:: VARIABLE SPEED OUTDOOR UNITS
REQUIRE THE INDOOR U NIT BE
CONFIGURED FOR 400 CFM/TON
NNoottee:: CURVES ONLY VALID DURING:
Charging mode — Cooling
Check Charge Mode — Heating
4.0 Ton
Heating
OUTDOOR TEMPERATURE (Degree F)
OUTDOOR TEMPERATURE (Degree F)
INTERCONNECTING LINES
GAS - 7/8" O.D.
LIQUID - 3/8" O.D.
DWG.NO. 4TWL9048A1
200
250
300
350
400
450
500
5 152535455565
30
40
50
60
70
80
90
100
110
120
130
140
5 152535455565
TAM9A0C48V41
Cooling
TAM9A0C48V41
LIQUID PRESSURE DISCHARGE PRESSURE
200
250
300
350
400
450
500
550
65 75 85 95 105 115
110
120
130
140
150
160
170
65 75 85 95 105 115
Liquid Service Valve Pressure (PSIG)Gas Service Valve Pressure (PSIG)
COOLING PERFORMANCE CAN BE CHECKED WHEN THE OUTDOOR TEMP IS ABOVE 55 DEG F.
SELECT “CHARGING MODE - COOLING” IN THE COMFORT CONTROL.
TO CHECK COOLING PERFORMANCE, SELECT THE PROPER INDOOR CFM, ALLOW PRESSURES TO STABILIZE. MEASURE INDOOR
WET BULB TEMPERATURE, OUTDOOR TEMPERATURE, LIQUID OR GAS SERVICE VALVE PRESSURES. ON THE PLOTS, LOCATE
OUTDOOR TEMPERATURE (1); LOCATE INDOOR WET BULB (2); FIND INTERSECTION OF OD TEMP. & ID W.B. (3); READ LIQUID
SERVICE VALVE PRESSURE OR GAS SERVICE VALVE COLUMN (4);
ACTUAL:
LIQUID SERVICE VALVE PRESSURE SHOULD BE +/- 10 PSI OF CHART
GAS SERVICE VALVE PRESSURE SHOULD BE +/- 3 PSIG OF CHART
EXAMPLE: (1) OUTDOOR TEMP. 82F
(2) INDOOR WE BULB 67F
(3) AT INTERSECTION
(4) LIQUID PRESSURE IS 324 PSIG.
(5) GAS PRESSURE IS 136 PSIG.
(1)
(3)
(4)
(1)
(3)
(5)
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM
71, 67, 63 AND 59 DEG F.
INDOOR ENTERING
DRY BULB CURVES
TOP TO BOTTOM
80, 70, AND 60 DEG F.
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM
71, 67, 63 AND 59 DEG F.
INDOOR ENTERING
DRY BULB CURVES
TOP TO BOTTOM
80, 70, AND 60 DEG F.