Page 9
Unit
HS24-211
HS24-311
HS24-511/513
HS24-141
HS24-413
HS24-651/653
HS24-413
HS24-461/463
HS24-411
HS24-261
HS24 REFRIGERANT CHARGE
TABLE 9
Refrigerant Charge R-22
4 lbs. 5 oz.
5 lbs. 7 oz.
5 lbs. 12 oz.
5 lbs. 15 oz.
5 lbs. 15 oz.
6 lbs. 2 oz.
9 lbs. 6 oz.
9 lbs. 0 oz.
11 lbs. 5 oz.
4 lbs. 10 oz.
If weighing facilities are not available or if unit is just low
on charge, the following procedure applies.
1 - Expansion Valve Systems
The following procedures are intended as a general guide
for use with expansion valve systems only. For best reĆ
sults, indoor temperature should be between
70
°
F and 80
°
F. Outdoor temperature should be 60
°
F or
above. Slight variations in charging temperature and presĆ
sure should be expected. Large variations may indicate a
need for further servicing.
IMPORTANT
The following procedure requires accurate readĆ
ings of ambient (outdoor) temperature, liquid temĆ
perature and liquid pressure for proper charging.
Use a thermometer with accuracy of +2
°
F and a
pressure gauge with accuracy of +5 PSIG.
1 - Connect gauge manifold. Connect an upright
R-22 drum to center port of gauge manifold.
2 - Record outdoor ambient temperature.
3 - Operate indoor and outdoor units. Allow outdoor unit
to run until system pressures stabilize.
4 - Make sure thermometer well is filled with mineral oil
before checking liquid line temperature.
5 - Place thermometer in well and read liquid line temĆ
perature. Difference between ambient and liquid
line temperatures should match values given in
table 10 (approach temperature = liquid line temĆ
perature minus ambient temperature). Refrigerant
must be added to lower approach temperature.
Remove refrigerant from system to increase apĆ
proach temperature.
TABLE 10
Model
Liquid Temp Minus Ambient
Temp. (
°
F)
HS24-261
HS24-311
HS24-411/413
HS24-461/463
APPROACH METHOD - EXPANSION VALVE SYSTEMS
4+1
8+1
10+1
16+1
HS24-211
5+1
HS24-141
1+1
HS24-511/513
7+1
HS24-651/653
10+1
6 - When unit is properly charged liquid line
pressures should approximate those given in
table 11.
IMPORTANT
Use table 11 as a general guide for performing
maintenance checks. Table 11 is not a procedure
for charging the system. Minor variations in these
pressures may be expected due to differences in
installations. Significant deviations could mean
that the system is not properly charged or that a
problem exists with some component in the sysĆ
tem. Used prudently, table 11 could serve as a useĆ
ful service guide.
TABLE 11
NORMAL OPERATING PRESSURES
OUTDOOR
COIL
ENTERING AIR
TEMPERATURE
HS24-141
HS24-261
HS24-311
HS24-411/413
65
°
F (TXV)
75
°
F (TXV)
85
°
F (TXV)
95
°
F (TXV)
LIQ.
+ 10
SUC.
+ 10
PSIG PSIG
LIQ.
+ 10
SUC.
+ 10
PSIG PSIG
LIQ.
+ 10
SUC.
+ 10
PSIG PSIG
105
°
F (TXV)
LIQ.
+ 10
SUC.
+ 10
PSIG PSIG
LIQ.
+ 10
SUC.
+ 10
PSIG PSIG
HS24-211
HS24-461/463
HS24-511/513 HS24-651/653
LIQ.
+ 10
SUC.
+ 10
PSIG
PSIG
LIQ.
+ 10
PSIG
SUC.
+ 10
PSIG
SUC.
+ 10
PSIG
LIQ.
+ 10
PSIG
126
149
178
208
236
58
70
77
79
84
133
157
184
214
250
60
68
75
77
80
140
164
190
221
254
63
70
76
78
81
151
178
207
238
276
61
67
73
75
78
164
191
218
251
292
60
66
72
74
77
163
188
220
255
294
58
67
73
78
81
146
167
200
231
261
63
69
74
76
80
147
174
201
233
278
59
66
71
73
76
105
°
F (RFCII)
95
°
F (RFCII)
85
°
F (RFCII)
75
°
F (RFCII)
65
°
F (RFCII)
126
149
178
208
236
52
64
71
78
83
137
161
188
216
252
56
64
71
77
80
142
168
194
220
253
59
66
72
78
81
154
181
210
238
276
58
64
70
75
78
158
185
218
250
283
58
64
70
75
77
166
191
223
255
294
56
65
71
77
80
146
167
200
231
261
60
66
71
75
79
152
179
206
233
278
55
62
67
72
75
