Lennox XP14-018-230-06 Nstallation And Service Instructions page 50

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.
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
Heat
Size Air Handler
(+5ºF)
CBX25UH-018
CBX25UHV-018
CBX25UH-024
CBX27UH-018/024
CBX32MV-018/024
CBA27UHE-018/024
-018
CH33-25A
CH33-25B
CR33-30/36
C37/CX38/C33/CX34-25
C37/CX38/C33/CX34-31
CBX25UH-024
CBX25UHV-024
CBX25UH-030
CBX25UHV-030
CBX26UH-024
CBX27UH-024
CBX27UH-030
CBX32M-018/024
CBX32M-030
CBX32MV-018/024
CBX32MV-024/030
CBX32MV-036
CBX40UHV-024/030
-024
CBA27UHE-024
CBA27UHE-030
CH23-41
CH33-25A
CH33-25B
CH33-31A
CH33-36C
CH33-36A
CR33-30, -036
C37/CX38/C33/CX34-25
C37/CX38/C33/CX34-31
C37/CX38/C33/CX34-36
CBX25UH-030
CBX25UHV-030
CBX25UH-036
CBX26UH-030
CBX27UH-030/036
CBX32M-030
CBX32M-036
CBX32MV-024/030
-030
CBX32MV-036
CBX40UHV-030
CBX40UHV-036
CBA27UHE-030/036
CH23-41
CH23-51
CH33-31A
CH33-31B
CH33-36A
CH33-36B
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**
Subcool Additional
HP Indoor Coil or
Charge
Cool
Size Air Handler
lbs oz
(+1ºF)
13 3 0 0 CH33-36C
15 5 0 7 CH33-42B
8 9 1 2 CH33-43C
9 4 0 3 CR33-30, -36
12 10 1 2 C37/CX38/C33/CX34-31
10 6 0 9 -030 C37/CX38/C33/CX34-36
11 5 0 4 C37/CX38/C33/CX34-38
18 5 0 9 C37/CX38/C33/CX34-42
8 4 0 9 C37/CX38/C33/CX34-43
C37/CX38
10 7 0 8
C33/CX34-44/-48
CBX25UH-036
6 6 0 9
CBX25UHV-036
17 3 0 15 CBX26UH-036
17 3 0 15 CBX27UH-036
12 12 1 2 CBX27UH-042
11 11 2 1 CBX27UH-048
14 11 0 4 CBX32M-036/042
12 12 1 2 CBX32MV-036
14 11 0 4 CBX32MV-048
12 12 1 2 CBX40UHV-042
11 11 2 1 CBX40UHV-048
11 11 2 1 CBX40UHV-036
16 11 1 7 CBA27UHE-036
13 11 1 3 CBA27UHV-042
10 3 0 0 CH33-43B
-036
20 10 1 1 CH33-43C
19 8 1 2 CH33-44/48B
15 11 1 15 CH33-48C
10 12 0 0 CH33-49C
20 10 1 1 CH33-50/60C
17 4 0 14 CR33-48
15 9 0 15 CR33-50, -60
15 16 0 9 C37/CX38/C33/CX34-38
26 6 0 9 C37/CX38/C33/CX34-43
C37/CX38
9 3 0 8
C33/CX34-44/48
19 11 1 5 C37/CX38/C33/CX34-49
C37/CX38
19 11 1 5
C33/CX34-50/60
CBX25UH-042
10 16 1 14
CBX25UHV-042
7 10 1 3 CBX26UH-042
10 16 1 14 CBX27UH-042, -048
7 10 1 3 CBX32M-048
10 16 1 14 CBX32MV-048
10 16 1 14 CBX40UHV-042, -048
-042
10 16 1 14 CBA27UHE-042
10 11 1 8 CBA27UHE-048
11 4 0 8 CH23-68
11 6 0 14 CH33-43B
16 18 2 8 CH33-43C
16 18 2 6 CH33-44/48B
10 6 0 6 CH33-48C
6 3 0 0 CH33-49C
Matchups/Charge Levels and Line Set Lengths
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 15ft. (4.6m) line sets; on line sets with 3/8"(9.5mm) liquid line, add 3oz. addition­
al refrigerant for every 5ft. longer than 15ft. If line length is less than 15ft., subtract this
amount (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 VAP/LIQ
134/239 135/257 136/279 138/300
140/262 142/281 143/302 144/325
136/268 138/288 140/308 141/330
137/248 139/268 141/288 143/311
129/234 131/254 132/275 134/298
137/237 138/256 139/277 140/298
133/241 134/262 135/283 137/306
Subcool
Cool
Heat
(+5ºF) (+1ºF)
10 11
16 18
4 9
22 5
17 15
25 6
10 19
25 6
13 17
9 21
31 3
31 3
18 3
11 4
11 4
18 3
18 3
11 4
11 4
11 4
18 3
20 5
16 6
14 8
26 9
24 8
26 9
15 8
15 8
38 5
15 5
15 4
23 8
40 4
11 7
23 8
42 5
42 5
13 5
13 5
13 5
13 5
19 5
18 6
20 9
7 9
22 5
18 4
22 5
16 6
Cooling Mode
85 90 95 100
VAP/LIQ VAP/LIQ VAP/LIQ
138/322 140/344 141/369
145/348 145/373 146/399
143/352 144/376 145/400
145/334 146/359 148/385
136/321 137/346 139/371
141/321 142/344 143/369
138/330 139/354 141/380
Additional
HP Indoor Coil or
Charge
Size Air Handler
lbs oz
1 5 CH33-50, -60C
2 6 CH33-60D
1 12 CH33-62D
1 0 CR33-50, -60
2 10 CR33-60D
-042
0 10 C37/CX38/C33/CX34-49
C37/CX38
2 14
C33/CX34-50, -60
0 10 C37/CX38/C33/CX34-60
2 14 C37/CX38/C33/CX34-62C
2 12 C37/CX38/C33/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 1 CBX32MV-060
0 1 CBX32MV-068
0 1 CBX40UHV-048
0 5 CBX40UHV-060
-048
0 0 CBA27UHE-048
0 11 CBA27UHE-060
2 1 CH23-68
2 10 CH33-50, -60C
2 3 CH33-60D
2 10 CH33-62D
2 12 CR33-50/60
2 12 CR33-60
0 0 C37/CX38/C33/CX34-49C
1 4 C37/CX38/C33/CX34-60
0 9 C37/CX38/C33/CX34-62C
2 8 C37/CX38/C33/CX34-62D
CBX25UH-060
0 15
CBX25UHV-060
3 9 CBX26UH-060
2 8 CBX27UH-060
0 8 CBX32M-060
0 8 CBX32MV-048
2 2 CBX32MV-060
2 2 CBX32MV-068
2 2 CBX40UHV-048
-060
2 2 CBX40UHV-060
0 1 CBA27UHE-060
1 6 CH23-68
1 5 CH33-50, -60C
3 2 CH33-62D
1 0 CR33-50/60
0 0 CR33-60
1 0 C37/CX38/C33/CX34-62C
1 6 C37/CX38/C33/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
Subcool Additional
Charge
Cool
Heat
lbs oz
(+5ºF) (+1ºF)
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
16 6 1 6
12 7 2 3
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
11 6 1 1
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