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PRESSURE
(psig)
0
2
4
6
8
10
12
14
16
18
2O
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
52
54
56
58
60
62
64
66
Table
18 -- Pressure
(psig) vs. Voltage
Drop Values
for Suction
Pressure
Transducers
VOLTAGE
PRESSURE
DROP (V)
(psig)
0.465
68
0.485
70
0.505
72
0.524
74
0.544
76
0.564
78
0.583
80
0.603
82
0.623
84
0.642
86
0.662
88
0.682
90
0.702
92
0.721
94
0.741
96
0.761
98
0.780
100
0.800
102
0.820
104
0.839
106
0.859
108
0.879
110
0.898
112
0.918
114
0.938
116
0.958
118
0.977
120
0.997
122
1.017
124
1.036
126
1.056
128
1.076
130
1.095
132
1.115
134
VOLTAGE
PRESSURE
DROP (V)
(psig)
1.135
136
1.154
138
1.174
140
1.194
142
1.214
144
1.233
146
1.253
148
1.273
150
1.292
152
1.312
154
1.332
156
1.351
158
1.371
160
1.391
162
1.410
164
1.430
166
1.450
168
1.470
170
1.489
172
1.509
174
1.529
176
1.548
178
1.568
180
1.588
182
1.607
184
1.627
186
1.647
188
1.666
190
1.686
192
1.706
194
1.726
196
1.745
198
1.765
200
1.785
202
VOLTAGE
DROP (V)
1.804
1.824
1.844
1.863
1.883
1.903
1.922
1.942
1.962
1.982
2.001
2.021
2.041
2.060
2.080
2.100
2.119
2.139
2.159
2.178
2.198
2.218
2.237
2.257
2.277
2.297
2.316
2.336
2.356
2.375
2.395
2.415
2.434
2.454
PRESSURE
VOLTAGE
(psig)
DROP
(V)
204
2.474
206
2.493
208
2.513
210
2.533
212
2.553
214
2.572
216
2.592
218
2.612
220
2.631
222
2.651
224
2.671
226
2.690
228
2.710
230
2.730
232
2.749
234
2.769
236
2.789
238
2.809
240
2.828
242
2.848
244
2.868
246
2.887
248
2.907
250
2.927
252
2.946
254
2.966
256
2.986
258
3.005
260
3.025
262
3.045
264
3.065
266
3.084
268
3.104
270
3.124
MAJOR SYSTEM
COMPONENTS
General
The
48/50PD
single
package
rooftop
units
contain
the
ComfortLink
.... electronic
control
system
that
monitors
all
operations
of the rooftop.
The control
system
is composed
of
several
main
control
components
and
available
factory-installed
options
or field-installed
accessories
as listed in
sections
below.
See Fig.
12-14
for the control
and power
schematics
for
48/50PD.
Fig. 15 shows
the layout
of the control
box, unit,
and
thermistor
and transducer
locations
for the 48/50PD.
42
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