Lennox XP14-018-230-06 Nstallation And Service Instructions page 48

HFC-410A CHARGING INFORMATION — FOR COMPLETE CHARGING DETAILS, REFER TO THE OUTDOOR UNIT INSTALLATION AND SERVICE PROCEDURE
Maintenance checks using the Normal Operating Pressures table
Table 2 may be used to help perform maintenance checks. This table is not a procedure for charg­
ing the system and any minor variations in the pressures may be expected due to differences in
installations. However, significant deviations could mean that the system is not properly charged
or that a problem exists with some component in the system.
Charge Using the Subcooling Method
Cooling Mode—When the outdoor ambient temperature is 60°F (15°C) and above, use the cool­
ing mode to adjust the charge using the subcooling method. Target subcooling values in table
1 are based on 70 to 80°F (21-27°C) indoor return air temperature.
Heating Mode—When the outdoor ambient temperature is below 60°F (15°C), use the heating
mode to adjust the charge using the subcooling charge levels (table ). Target subcooling values
in table 1 are based on 65-75°F (18-24°C) indoor return air temperature.
Matchups/Charge Levels and Line Set Lengths
Table 1 - Normal Operating Pressures (Liquid
Heating Mode
ºF (ºC)* 20 30
SIZE VAP/LIQ VAP/LIQ VAP/LIQ
-018 65/289 80/304
-024 58/281 72/295
-030 55/274 69/286
-036 62/287 76/304
-042 58/293 73/335
-048 60/282 75/299
-060 56/266 70/285
*Temperature of the air entering the outside coil.
HP Indoor Coil or Air
Heat
Size Handler
(+5ºF)
CBX25UH-018
13
CBX25UHV-018
CBX27UH-018 8
CBX27UH-024 8
CBX32MV-018/024 9
CH33-25A 10
-018
CH33-25B 11
CR33-30/36 18
CX34-25 8
CX34-31 10
CBX25UH-024
6
CBX25UHV-024
CBX25UH-030
17
CBX25UHV-030
CBX26UH-024 17
CBX27UH-024 12
CBX27UH-030 11
CBX32M-018, -024 14
CBX32M-030 12
CBX32MV-018/024 14
CBX32MV-024/030 12
CBX32MV-036 11
-024
CBX40UHV-024 11
CBX40UHV-030 11
CH23-41 10
CH33-25A 20
CH33-25B 19
CH33-31A 15
CH33-36C 10
CH33-36A 20
CR33-30, -036 17
CX34-25 15
CX34-31 15
CX34-36 26
CX34-38 10
CBX25UH-030
9
CBX25UHV-030
CBX25UH-036 19
CBX26UH-030 19
CBX27UH-030 10
CBX27UH-036 10
CBX32M-030 7
CBX32M-036 10
CBX32MV-024/030 7
-030
CBX32MV-036 10
CBX40UHV-030 10
CBX40UHV-036 10
CH23-41 11
CH23-51 11
CH33-31A 16
CH33-31B 16
CH33-36A 10
The values in this table are most popular match-up pressures; indoor match-up, indoor air quantity, and indoor load will cause the pressures to vary. *Amount of charge required in addition to charge shown on unit
nameplate.
10 and Suction
+
40 50 60 65
VAP/LIQ VAP/LIQ VAP/LIQ
97/322 116/341 137/360 132/224
88/ 309 105/324 123/340 139/243
84/ 299 102/313 122/327 135/250
91/ 322 106/342 124/365 135/230
89/ 368 108/394 130/411 127/215
90/ 316 105/334 121/353 136/219
84/ 309 99/ 337 114/369 132/222
Table 2 - Indoor Unit Matches and Subcooling Charge Levels and Additional Charge
Additional
Subcool
HP
Charge
Cool
Size
lbs oz
(+1ºF)
3 0 0
9 1 2
9 1 2
4 0 3
6 0 9
5 0 4
5 0 9 -030
4 0 9
7 0 8
6 0 9
3 0 15
3 0 15
12 1 2
11 2 1
11 0 4
12 1 2
11 0 4
12 1 2
11 2 1
11 2 1
11 2 1
3 0 0
10 1 1
8 1 2
-036
11 1 15
12 0 0
10 1 1
4 0 14
9 0 15
16 0 9
6 0 9
18 1 14
3 0 8
11 1 5
11 1 5
16 1 14
16 1 14
10 1 3
16 1 14
10 1 3
16 1 14
16 1 14
-042
16 1 14
4 0 8
6 0 14
18 2 8
18 2 6
6 0 6
Table 2 lists all the Lennox recommended indoor unit matchups along with the charge levels for
the various sizes of outdoor units. Charge levels on the unit nameplate are based on installa­
tions with 15' (4.6m) line sets; be sure to consider any difference in line set length (see
Installation Instructions for more details).
Charge Using the Weigh‐in Method
If the system is void of refrigerant, locate and repair any leaks and then weigh in the refrigerant
charge into the unit. For charge adjustments, be sure to consider line set length differences and,
referring to table 1, adjust for the matchup difference.
1 - Recover the refrigerant from the unit.
2 - Conduct leak check; evacuate as previously outlined.
3 - Weigh in the unit nameplate charge, adjusting for matchup and line set length differences.
If weighing facilities are not available use the Subcooling method.
5 psig)
+
70 75 80
VAP/LIQ VAP/LIQ VAP/LIQ
134/239 135/257 136/279
140/262 142/281 143/302
136/268 138/288 140/308
137/248 139/268 141/288
129/234 131/254 132/275
137/237 138/256 139/277
133/241 134/262 135/283
Subcool
Indoor Coil or Air
Cool
Heat
Handler
(+5ºF) (+1ºF)
CH33-36B 6 3
CH33-36C 10 11
CH33-42B 16 18
CH33-43C 4 9
CR33-30, -36 22 5
CX34-31 17 15
CX34-36 25 6
CX34-38 10 19
CX34-42 25 6
CX34-43 13 17
CX34-44, -48 9 21
CBX25UH-036
31 3
CBX25UHV-036
CBX26UH-036 31 3
CBX27UH-036 18 3
CBX27UH-042 11 4
CBX27UH-048 11 4
CBX32M-036 18 3
CBX32M-042 18 3
CBX32MV-036 18 3
CBX32MV-048 11 4
CBX40UHV-042 11 4
CBX40UHV-048 11 4
CBX40UHV-036 18 3
CH33-43B 14 8
CH33-43C 26 9
CH33-44/48B 24 8
CH33-48C 26 9
CH33-49C 15 8
CH33-50/60C 15 8
CR33-48 38 5
CR33-50, -60 15 5
CX34-38 15 4
CX34-43 23 8
CX34-44/48 40 4
CX34-49 11 7
CX34-50/60 23 8
CBX25UH-042
42 5
CBX25UHV-042
CBX26UH-042 42 5
CBX27UH-042, -048 13 5
CBX32M-048 13 5
CBX32MV-048 13 5
CBX40UHV-042 13 5
CBX40UHV-048 13 5
CH23-68 20 9
CH33-43B 7 9
CH33-43C 22 5
CH33-44/48B 18 4
CH33-48C 22 5
Cooling Mode
85 90 95 100
VAP/LIQ VAP/LIQ VAP/LIQ VAP/LIQ
138/300 138/322 140/344 141/369
144/325 145/348 145/373 146/399
141/330 143/352 144/376 145/400
143/311 145/334 146/359 148/385
134/298 136/321 137/346 139/371
140/298 141/321 142/344 143/369
137/306 138/330 139/354 141/380
Additional
HP Indoor Coil or Air
Charge
Size Handler
lbs oz
0 0 CH33-49C
1 5 CH33-50, -60C
2 6 CH33-60D
1 12 CH33-62D
1 0 CR33-50, -60
2 10 CR33-60D
0 10 CX34-49
-042
2 14 CX34-50, -60
0 10 CX34-60
2 14 CX34-62C
2 12 CX34-62D
CBX25UH-048
0 4
CBX25UHV-048
0 4 CBX26UH-048
0 5 CBX27UH-048
0 1 CBX27UH-060
0 1 CBX32M-048
0 5 CBX32M-060
0 5 CBX32MV-048
0 5 CBX32MV-060
0 1 CBX32MV-068
0 1 CBX40UHV-048
0 1 CBX40UHV-060
-048
0 5 CH23-68
2 1 CH33-50, -60C
2 10 CH33-60D
2 3 CH33-62D
2 10 CR33-50/60
2 12 CR33-60
2 12 CX34-49C
0 0 CX34-60
1 4 CX34-62C
0 9 CX34-62D
CBX25UH-060
2 8
CBX25UHV-060
0 15 CBX26UH-060
3 9 CBX27UH-060
2 8 CBX32M-060
0 8 CBX32MV-048
0 8 CBX32MV-060
2 2 CBX32MV-068
2 2 CBX40UHV-048
-060
2 2 CBX40UHV-060
2 2 CH23-68
2 2 CH33-50, -60C
1 5 CH33-62D
3 2 CR33-50/60
1 0 CR33-60
0 0 CX34-62C
1 0 CX34-62D
105 110 115
VAP/LIQ VAP/LIQ VAP/LIQ
142/395 145/421 146/481
147/426 147/454 148/483
147/426 148/452 149/480
150/412 151/441 153/471
140/398 141/426 142/455
144/395 146/422 147/450
142/406 143/434 144/463
Additional
Subcool
Charge
Cool
Heat
lbs oz
(+5ºF) (+1ºF)
16 6 1 6
10 9 3 4
12 8 0 9
19 7 1 7
29 5 0 4
29 5 0 4
11 6 1 4
25 8 1 15
8 8 1 4
8 11 3 10
11 7 1 15
15 6 2 5
20 10 3 11
16 6 0 0
12 6 1 4
16 6 0 0
20 8 1 0
16 6 0 0
20 8 1 0
10 8 4 5
16 6 0 0
20 8 1 0
24 6 2 8
17 6 1 5
18 6 0 13
13 7 3 6
19 6 1 1
19 6 1 1
10 6 1 9
28 7 3 14
10 6 3 12
14 7 3 12
15 6 2 0
31 6 3 0
13 7 0 8
17 5 1 4
20 6 0 0
17 5 1 4
11 8 2 12
20 6 0 0
17 5 1 4
27 7 0 13
11 4 0 0
19 6 2 4
19 6 2 4
23 6 1 3
10 7 2 14
19 7 3 2