FIRST STAGE SECOND STAGE
830 SCFM 1175 SCFM
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 @ 830 CFM IS 288 PSIG (4) LIQUID PRESSURE @ 1175 CFM IS 312 PSIG
(5) SUCTION PRESSURE @ 830 CFM IS 149 PSIG (5) SUCTION PRESSURE @ 1175 CFM IS 144 PSIG
ACTUAL:
LIQUID PRESSURE SHOULD BE +/- 10 PSI OF CHART
SUCTION PRESSURE SHOULD BE +/- 3 PSIG OF CHART
DWG.NO. 4YCZ6036
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(1)
(1)
(3)
(3)
(5)
(4)
(2)
(2)
INDOOR EN
TERING
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)
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