Page 17
HPXA15 Cooling Cycle
(Showing Gauge Manifold Connections)
Figure 16
NOTE−Use gauge ports on vapor line valve and liquid valve for evacuating refrigerant lines
and indoor coil. Use vapor gauge port to measure vapor pressure during charging.
OUTDOOR
COIL
DEFROST THERMOSTAT
EXPANSION/
CHECK VALVE
BIFLOW
FILTER /
DRIER
TO
R410A
DRUM
LOW
PRESSURE
HIGH
PRESSURE
COMPRESSOR
REVERSING VALVE
VAPOR
LINE
VALVE
MUFFLER
NOTE − ARROWS INDICATE
DIRECTION OF REFRIGERANT
FLOW
SERVICE
PORT
VAPOR
EXPANSION/CHECK
VALVE
INDOOR UNIT
OUTDOOR UNIT
LIQUID
LINE
SERVICE
PORT
GAUGE MANIFOLD
DISTRIBUTOR
INDOOR
COIL
Table 5
Normal Operating Pressures
(Liquid ±10 and Vapor ±5 psig)
Cooling Operation
Outdoor Coil
E t
i
Ai
HPXA15−024
HPXA15−030
HPXA15−036
HPXA15−042
HPXA15−048
HPXA15−060
Entering Air
Temp. °F (°C)
Liquid
Vapor
Liquid
Vapor
Liquid
Vapor
Liquid
Vapor
Liquid
Vapor
Liquid
Vapor
65 (18.3)
252
131
233
141
216
136
240
133
228
137
231
124
75 (23.9)
291
133
272
142
276
138
281
135
265
139
269
126
85 (29.4)
337
135
314
143
298
139
325
137
304
141
315
127
95 (35.0)
371
140
360
146
359
141
372
138
348
142
370
133
105 (40.6)
421
142
413
148
400
143
428
142
405
145
415
136
Heating Operatio
n
Outdoor Coil
E t
i
Ai
HPXA15−024
HPXA15−030
HPXA15−036
HPXA15−042
HPXA15−048
HPXA15−060
Entering Air
Temp. °F (°C)
Liquid
Vapor
Liquid
Vapor
Liquid
Vapor
Liquid
Vapor
Liquid
Vapor
Liquid
Vapor
20 (−6.6)
288
60
270
67
234
62
340
65
313
60
245
55
30 (−1.1)
306
75
297
84
257
80
350
72
330
73
287
66
40 (4.4)
325
90
325
100
318
93
353
83
346
87
332
82
50 (10.0)
344
105
353
117
322
103
358
101
366
101
347
99
