13–8–612 Page 61
FIGURE 11–2 – TEMPERATURE–PRESSURE CHART (R–22)
TEMPERATURE–PRESSURE CHART (R–22)
Temperature
Pressure
Temperature
Pressure
F
psig
F
psig
28
52.4
65
111.2
30
54.9
70
121.4
32
57.5
75
132.2
34
60.1
80
143.6
36
62.8
85
155.7
38
65.6
90
168.4
40
68.5
95
181.8
45
76.0
100
195.9
50
84.0
105
210.8
55
92.6
110
226.4
60
101.6
button, “MOTOR RUN” indicator and an “ALARM” indi-
cator light.
The compressor fan motor is directly controlled by
pressure switch S2 when the dryer is in the “MOTOR
RUN” mode. Pressure switch S2 will close to activate
the fan motor when the dryer compressor discharge
pressure reaches 195 PSI. The fan motor will continue
to operate until the dryer compressor discharge pres-
sure decreases to 150 PSI causing pressure switch S2
to open.
The “ALARM” circuit in the EBB integrated dryer is con-
trolled by pressure switch S1 which will open if the dryer
compressor discharge pressure reaches 375 PSI. This
condition will cause the dryer unit to shutdown and the
“ALARM” indicator to be lit. The unit cannot be re-
started until the dryer compressor discharge pressure
decreases below 300 PSI causing pressure switch S1
to close and the “ALARM” indicator to be extinguished.
Refer to the troubleshooting guide in the event of an
“ALARM” condition.
The EBB integrated dryer must be manually restarted
in the event of a power failure.
The noncycling operation of the refrigerated dryer is
controlled by two modulating valves. The hot gas by-
pass valve is used in conjunction with the capillary tube.
This valve automatically opens and closes depending
on the amount of cooling required, thus maintaining the
design pressure dew point. The hot gas by–pass is
preset at the factory. The suction pressure gauge
should indicate 65 psig for R–22. If adjustment is nec-
essary, refer to FIGURE 11–3.
FIGURE 11–3 – ADJUSTING NUT FOR SUCTION PRESSURE
Increasing the suction pressure will
raise the evaporator temperature.
Decreasing the suction pressure will
lower the evaporator temperature.
Summary of Contents for EBB BB-7.5 HP
Page 12: ...13 8 612 Page 2 FIGURE 1 2 PACKAGE COMPRESSOR MOTOR SIDE FIGURE 1 3 PACKAGE BELT GUARD SIDE...
Page 13: ...13 8 612 Page 3 FIGURE 1 4 PACKAGE CONTROLLER END...
Page 16: ...13 8 612 Page 6 DECALS 206EAQ077 212EAQ077 218EAQ077 211EAQ077 207EAQ077...
Page 17: ...13 8 612 Page 7 DECALS 216EAQ077 217EAQ077 222EAQ077 221EAQ077 208EAQ077...
Page 32: ...13 8 612 Page 22 FIGURE 4 7 AUTO SENTRY S SOLID STATE CONTROL TOUCH PAD...
Page 33: ...13 8 612 Page 23 200EBB546 Ref Drawing FIGURE 4 8 WIRING DIAGRAM...
Page 53: ...13 8 612 Page 43 PIPING AND MOUNTING GROUP 213EBB810 B Ref Drawing...
Page 77: ...13 8 612 Page 67 INTEGRATED DRYER ASSEMBLY AND PIPING 301EBB810 A Ref Drawing...
Page 82: ...13 8 612 Page 72 300EBB541 B Ref Drawing...
Page 84: ......
