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TABLE 13
SUBCOOLING METHOD
AMBIENT TEMPERATURE BELOW 60 _F (16 _C)
Model
Condensing Temp°F Warmer Than Liquid Line
HP29−211
HP29−261
HP29−311
HP29−411
HP29−461
HP29−511
HP29−651
HP29−211
OUTDOOR COIL
LIQ.
ENTERING AIR
+ 10
TEMPERATURE
PSIG
°
65
F (TXV)
148
°
75
F (TXV)
171
°
85
F (TXV)
200
°
95
F (TXV)
230
°
105
F (TXV)
263
*These are typical pressures only. Indoor evaporator match up, indoor air quality and evaporator load will cause the pressures to vary.
OUTDOOR
COIL AIR
COIL AIR
ENTERING
MODE
TEMP.
_F (_C)
PSIG
75 (24)
Cooling
g
85 (29)
TXV
TXV
95 (35)
Only
Only
105 (41)
20 (−7)
30 (−1)
Heating
Heating
40 (4)
50 (10)
* These are typical pressures only. Indoor evaporator match up, indoor air quality and evaporator load will cause the pressures to vary.
IMPORTANT
Use tables 15 and 16
performing maintenance checks. Table
procedure for charging the system. Minor variations
in pressures may be expected due to differences in
installations. Significant deviations may mean the
system is not properly charged or that a problem
exists with some component in the system. Used
prudently, tables 15 and 16 could serve as a useful
service guide.
E − Oil Charge
Refer to tables 6 and 7 on page 7.
V − MAINTENANCE
At the beginning of each heating or cooling season, the
system should be cleaned as follows:
A − Outdoor Unit
1 − Clean and inspect outdoor coil. (Coil may be
flushed with a water hose).
2 − Visually inspect all connecting lines, joints and
coils for evidence of oil leaks.
8°F (4.4°C)
6°F (3.3°C)
10°F (5.6°C)
8°F (4.4°C)
12°F (6.7°C)
13°F (7.2°C)
5°F (2.8°C)
HP29 NORMAL OPERATING PRESSURES*
HP29−261
HP29−311
VAP.
VAP.
LIQ.
LIQ.
+ 10
+ 10
+ 10
+ 10
PSIG
PSIG
PSIG
PSIG PSIG
71
156
70
165
74
182
72
195
76
210
74
220
78
241
75
254
81
275
78
292
HP29 NORMAL OPERATING PRESSURES
HP29-018
HP29-024
LIQ.
SUC.
LIQ.
SUC.
+10
+5
+10
+5
PSIG
PSIG
PSIG
171
74
182
72
200
76
210
74
230
78
241
75
263
81
275
78
166
33
170
28
177
42
184
36
188
51
194
42
200
61
212
56
as a general guide for
is not a
AMBIENT TEMPERATURE BELOW 60 _F (16 _C)
Model
HP29−018
HP29−024
HP29−030
HP29−036
HP29−042
HP29−048
HP29−060
TABLE 15
HP29−411
HP29−461
VAP.
VAP.
LIQ.
LIQ.
+ 10
+ 10
+ 10
+ 10
PSIG
PSIG
PSIG
73
171
68
173
75
197
70
203
233
77
228
72
79
261
74
267
81
299
77
307
TABLE 16
HP29-030
HP29−036
LIQ.
SUC.
LIQ.
SUC.
+10
+5
+10
+5
PSIG
PSIG
PSIG
PSIG
184
71
184
74
214
72
215
75
246
74
249
76
282
45
285
76
186
28
170
27
198
36
180
38
210
43
230
50
218
53
240
55
If insufficient heating or cooling occurs, the unit
should be gauged and refrigerant charge
checked.
B − Indoor Coil
1 − Clean coil if necessary.
2 − Check connecting lines and coil for evidence of oil
leaks.
3 − Check condensate line and clean if necessary.
C − Indoor Unit
1 − Clean or change filters.
2 − Bearings are pre-lubricated and need no further
oiling.
3 − Check all wiring for loose connections.
4 − Check for correct voltage at unit.
5 − Check amp−draw on blower motor.
Unit nameplate_________Actual_________.
Page 16
TABLE 14
SUBCOOLING METHOD
Condensing Temp°F Warmer Than Liquid Line
8°F (4.4°C)
4_F (2.2_C)
11_F (6.1)
10°F (5.6°C)
12°F (6.7°C)
7_F (3.9_C)
10°F (5.6°C)
HP29−511
VAP.
VAP.
LIQ.
+ 10
+ 10
+ 10
PSIG
PSIG
PSIG
69
163
74
71
191
75
73
225
76
75
259
78
77
295
79
HP29-042
HP29-048
LIQ.
SUC.
LIQ.
SUC.
+10
+5
+10
+5
PSIG
PSIG
PSIG
PSIG
180
71
180
70
205
74
210
70
245
75
240
71
280
76
280
72
180
30
175
25
190
40
185
35
195
47
195
43
205
54
206
52
IMPORTANT
HP29−651
VAP.
LIQ.
+ 10
+ 10
PSIG
PSIG
166
71
195
73
227
74
261
76
302
78
HP29-060
LIQ.
SUC.
+10
+5
PSIG
PSIG
183
72
214
73
248
75
285
77
186
25
200
32
212
42
224
50
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