Advertisement
Pressure Curves
I I m m p p o o r r t t a a n n t t : : VARIABLE SPEED OUTDOOR UNITS
REQUIRE THE INDOOR U NIT BE
CONFIGURED FOR 400 CFM/TON
4.0 Ton
TAM9A0C48V41
Cooling
LIQUID PRESSURE
550
INDOOR ENTERING
WET BULB CURVES
500
TOP TO BOTTOM
71, 67, 63 AND 59 DEG F.
450
400
350
(4)
(3)
300
250
(1)
200
65
75
85
170
INDOOR ENTERING
WET BULB CURVES
TOP TO BOTTOM
160
71, 67, 63 AND 59 DEG F.
150
140
(5)
(3)
130
120
(1)
110
65
75
85
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);
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.
INTERCONNECTING LINES
GAS - 7/8" O.D.
LIQUID - 3/8" O.D.
52
95
105
115
OUTDOOR TEMPERATURE (Degree F)
95
105
115
OUTDOOR TEMPERATURE (Degree F)
ACTUAL:
LIQUID SERVICE VALVE PRESSURE SHOULD BE +/- 10 PSI OF CHART
GAS SERVICE VALVE PRESSURE SHOULD BE +/- 3 PSIG OF CHART
N N o o t t e e : : CURVES ONLY VALID DURING:
Charging mode — Cooling
Check Charge Mode — Heating
TAM9A0C48V41
Heating
DISCHARGE PRESSURE
500
INDOOR ENTERING
DRY BULB CURVES
TOP TO BOTTOM
450
80, 70, AND 60 DEG F.
400
350
300
250
200
5
15
25
35
140
INDOOR ENTERING
DRY BULB CURVES
130
TOP TO BOTTOM
120
80, 70, AND 60 DEG F.
110
100
90
80
70
60
50
40
30
5
15
25
35
DWG.NO. 4TWL9048A1
45
55
65
45
55
65
4TWL9048A-SF-1C-EN
Advertisement
