Panasonic U-120ME2U9, Руководство по установке

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Obtain liquid tubing size from Tables 1-3, 4, 5, 7 and 10-1.
Main tubing
LA = ø5/8 (in.) (Total capacity of indoor unit is 179,400 BTU/h (52.6kW))
LB = ø1/2 (in.) (Total capacity of indoor unit is 131,600 BTU/h (38.6kW))
LC = ø3/8 (in.) (Total capacity of indoor unit is 83,800 BTU/h (24.6kW))
Distribution joint tubing
Outdoor side A: ø3/8 (in.) B: ø3/8 ( in. ) (from outdoor unit connection tubing)
Indoor side 1: ø3/8 (in.) 2: ø3/8 (in.) 3: ø3/8 (in.) 4: ø3/8 (in. ) (from indoor unit connection tubing)
●
Obtain additional charge amount for each tubing size and additional refrigerant charge amount for all indoor unit cooling capacity.
Note 1: The charge amounts per 1 ft. are different for each liquid tubing size.
ø5/8 (in.)
→
LA : 131 ft. × 1.99 oz/ft. = 261 oz (40m × 185
g
/m = 7,400
g
)
ø1/2 (in.)
→
LB : 16 ft. × 1.38 oz/ft. = 22 oz (4.9m × 128
g
/m = 627
g
)
ø3/8 (in.)
→
LC + A – B + 1 – 4
: 225 ft. × 0.602 oz/ft. = 135 oz (68.6m × 56
g
/m = 3,842
g
)
Total 418 oz (Total 11,869
g
)
Additional refrigerant charge amount is 418 oz (11,869
g
).
Note 2: Necessary amount of additional refrigerant charge per outdoor unit is 141oz (4,000
g
) in combination of 2 units.
(See the Table 1-10-2.)
Note 2) Amount of additional charge for outdoor unit (combination number) : 141oz (4,000
g
)
Note 3: Necessary amount of additional refrigerant charge for all indoor unit cooling capacity
[BTU/h] [kW]
179,400 BTU/h
Cooling capacity (BTU/h) x 1.034 x 0.001 + 10.6 oz
= 179,400 x 1.034 x 0.001 + 10.6 = 196 oz (52.6 kW)
(Cooling capacity (kW) x1000 x 0.1 + 300
g
= 52.6 x 1000 x 0.1 + 300 = 5,560
g
)
Note 1) Amount of additional charge per tubing length : 418 oz (11,869
g
)
Note 2) Amount of additional charge for outdoor unit (combination number) : 141 oz (4,000
g
)
Note 3) Amount of additional charge for all indoor unit cooling capacity : 196 oz (5,560
g
)
Total of additional refrigerant charge amount : 755 oz (21,429
g
)
Therefore, the total of additional refrigerant charge amount reaches 755 oz (21,429
g
).
●
Obtain overall refrigerant charge amount.
Overall refrigerant charge amount of the system indicates the calculated value shown above the additional charge amount in
addition to the total refrigerant charge amount (shown in the Table 1-6) at shipment in total cooling capacity of outdoor unit.
Refrigerant charge amount at shipment
(total cooling capacity of outdoor unit) :
: [168,000BTU/h] 684 oz [49.2kW] (19,400
g
)
Total of additional refrigerant charge amount
:
755 oz (21,429
g
)
Grand total 1,439 oz (40,829
g
)
Therefore, overall refrigerant charge amount of the system reaches 1,439 oz (40,829
g
).
Remark:
Be sure to include the values in Table 1-10-2 Necessary Amount of Additional Refrigerant Charge Per Outdoor Unit.
CAUTION Be sure to check the limit density for the room in which the indoor unit is installed.
1 2 3 4
LA
LB
LC
A B
Example:
Outdoor unit
Type 96 Type 72
Type 48 Type 48 Type 48 Type 36
●
Example of each tubing length
Main tubing Distribution joint tubing
LA = 131 ft. (40m) Outdoor side Indoor side
LB = 16 ft. (4.9m)
A = 7 ft. (2.1m) 1 = 98 ft. (30m)
LC = 16 ft. (4.9m)
B = 7 ft.
(2.1m)
2 = 16 ft. (4.9m)
3 = 16 ft. (4.9m)
4 = 65 ft. (19.8m)
●
Example of all indoor unit cooling capacity
[Type 48 x 3] 47,800 x 3 = 143,400 BTU/h (14.0 x 3 = 42.0 kW)
[Type 36 x 1] 36,000 x 1 = 36,000 BTU/h (10.6 x 1 = 10.6 kW)
[Total] 179,400 BTU/h (52.6 kW)
●
Example of all outdoor units
cooling capacity
Type 72: 72,000 BTU/h (21.1 kW)
Type 96: 96,000 BTU/h (28.1 kW)
[Total] 168,000 BTU/h (49.2 kW)
00_302411_EN.indd 16 2018/7/4 13:27:19