Engineering Manual

84
9-1-3. ADDITION OF REFRIGERANT
• Additional charging is not necessary if the pipe length does not exceed 21 m(70 ft) for A12-A30 or 30 m(100 ft) for A36/42.
• If the pipe length exceeds the specified length above, charge the unit with additional R410A refrigerant according to the
permitted pipe lengths in the chart below.
* When the unit is stopped, charge the unit with the additional refrigerant through the liquid stop valve after the pipe
extensions and indoor unit have been vacuumized.
* When the unit is operating, add refrigerant to the gas check valve using a safety charger. Do not add liquid refrigerant
directly to the check valve.
* After charging the unit with refrigerant, note the added refrigerant amount on the service label (attached to the unit).
• Be careful when installing multiple units. Connecting to an incorrect indoor unit can lead to abnormally high pressure and have
a serious effect on operation performance.
Refrigerant piping length (one way)
30m (100ft) 40m (130ft) 60m (195ft)
20m (70ft)10m (33ft)5m (16ft)
Outdoor unit
PUY-A36/42
PUY-A24/30
PUY-A12/18
1.00
1.00
1.00
0.985
0.988
0.985
0.948
0.964
0.948
0.916
0.938
0.916
0.886
0.915
0.886
–
0.872
0.838
69m (225ft)
–
0.855
0.818
50m (165ft)
0.859
0.893
0.859
■ COOLING CAPACITY CORRECTION FACTORS
9-1-2. PUY-A series
■ PUZ-A series
Model
Max. pipe
length
Max. height
difference
Additional refrigerant charging amount (kg/oz)
21 m 24 m 27 m 30 m 34 m 37 m 40 m 43 m 46 m 49 m 50 m
70 ft 80 ft 90 ft 100 ft 110 ft 120 ft 130 ft 140 ft 150 ft 160 ft 165 ft
PUZ-A12/18 30 m, 100 ft 30 m, 100 ft
0
0.06 kg 0.11 kg 0.17 kg
- - - - - - -
2 oz 4 oz 6 oz
PUZ-A24/30 50 m, 165 ft 30 m, 100 ft
0
0.2 kg 0.4 kg 0.6 kg 0.79 kg 0.99 kg 1.19 kg 1.39 kg 1.59 kg 1.79 kg 1.89 kg
7 oz 14 oz 21 oz 28 oz 35 oz 42 oz 49 oz 56 oz 63 oz 66.5 oz
PUZ-A36/42 50 m, 165 ft 30 m, 100 ft
0 0 0 0
0.2 kg 0.4 kg 0.6 kg 0.79 kg 0.99 kg 1.19 kg 1.29 kg
7 oz 14 oz 21 oz 28 oz 35 oz 42 oz 45.5 oz
■ PUY-A series
Model
Max. pipe
length
Max. height
difference
Additional refrigerant charging amount (kg/oz)
21 m 24 m 27 m 30 m 34 m 37 m 40 m 43 m 46 m 49 m 50 m 52 m 55 m 58 m 61 m 64 m 67 m 69 m
70 ft 80 ft 90 ft 100 ft 110 ft 120 ft 130 ft 140 ft 150 ft 160 ft 165 ft 170 ft 180 ft 190 ft 200 ft 210 ft 220 ft 225 ft
PUY-A12/18
50 m, 165 ft 30 m, 100 ft 0
0.03 kg 0.06 kg 0.09 kg 0.11 kg 0.14 kg 0.17 kg 0.20 kg 0.23 kg 0.26 kg 0.27 kg
- - - - - - -
1 oz 2 oz 3 oz 4 oz 5 oz 6 oz 7 oz 8 oz 9 oz 9.5 oz
PUY-A24/30
69 m, 225 ft 30 m, 100 ft 0
0.09 kg 0.17 kg 0.26 kg 0.34 kg 0.43 kg 0.51 kg 0.60 kg 0.68 kg 0.77 kg 0.81 kg 0.85 kg 0.94 kg 1.02 kg 1.11 kg 1.19 kg 1.28 kg 1.32 kg
3 oz 6 oz 9 oz 12 oz 15 oz 18 oz 21 oz 24 oz 27 oz 28.5 oz 30 oz 33 oz 36 oz 39 oz 42 oz 45 oz 46.5 oz
PUY-A36/42 69 m, 225 ft 30 m, 100 ft 0 0 0 0
0.09 kg 0.17 kg 0.26 kg 0.34 kg 0.43 kg 0.51 kg 0.55 kg 0.60 kg 0.68 kg 0.77 kg 0.85 kg 0.94 kg 1.02 kg 1.06 kg
3 oz 6 oz 9 oz 12 oz 15 oz 18 oz 20 oz 21 oz 24 oz 27 oz 30 oz 33 oz 36 oz 37.5 oz