4T-V8-SF-1M-EN
61
Figure 22. 4TWV8037A
TAM8C0C36V31 TAM8C0C36V31
Cooling with Electronic Expansion Valve Heating
DISCHARGE PRESSURE (PSIG)
OUTDOOR TEMPERATURE (Degree F)
SUCTION PRESSURE (PSIG)
110
115
120
125
130
135
140
145
150
155
160
165
170
40 60 80 100 120
200
250
300
350
400
450
500
45 65 85 105 125
(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.
30
40
50
60
70
80
90
100
110
120
130
140
-5 5 152535455565
INDOOR ENTERING
DRY BULB CURVES
TOP TO BOTTOM
80, 70, AND 60 DEG F.
COOLING PERFORMANCE CAN BE CHECKED WHEN THE OUTDOOR TEMP IS ABOVE 55F.
* WHEN USING PRESSURE CURVES TO VERIFY TYPICAL PERFORMANCE, ALWAYS RUN THE SYSTEM WITH ONE OF THE
TEST MODES FOUND IN THE 950/850 COMFORT CONTROL. CHARGING MODE - COOLING OR CHECK CHARGE MODE - HEATING.
TO CHECK COOLING PERFORMANCE, SELECT THE PROPER INDOOR CFM, ALLOW PRESSURES TO STABLIZE. 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 DISCHARGE (4) OR SUCTION
PRESSURE (5) IN LEFT COLUMN.
EXAMPLE: (1) OUTDOOR TEMP. 82 F.
(2) INDOOR WET BULB 67 F.
(3) AT INTERSECTION
(4) DISCHARGE PRESSURE @ 1400 CFM IS 316 PSIG
(5) SUCTION PRESSURE @ 1400 CFM IS 138 PSIG
ACTUAL:
LIQUID PRESSURE SHOULD BE +/- 10 PSI OF CHART
SUCTION PRESSURE SHOULD BE +/- 3 PSIG OF CHART
INTERCONNECTING LINES
GAS - 3/4” O.D.
LIQUID - 3/8”
DWG. NO. 4TWV8037A
OUTDOOR TEMPERATURE (Degree F)
200
250
300
350
400
450
500
5152535455565
60 70 80
Indoor Temperature (F)
INDOOR ENTERING
DRY BULB CURVES
TOP TO BOTTOM
80, 70, AND 60 DEG F.
PPrreessssuurreeCCuurrvveess
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