Mitsubishi Electric PUHY-P1000, Руководство по обслуживанию

Страница: 141 / 334

[6-9 Evaluating and Adjusting Refrigerant Charge ]
- 132 -
HWE14040 GB
6-9-3 The Amount of Refrigerant to Be Added
The amount of refrigerant that is shown in the table below is factory-charged to the outdoor units.
The amount necessary for extended pipe (field piping) is not included and must be added on site.
(1) Calculation formula
The amount of refrigerant to be added depends on the size and the length of field piping. (unit in m[ft])

When the piping length to the farthest indoor unit is shorter than 30.5 meters (100 feet)

When the piping length to the farthest indoor unit is 30.5 meters (100 feet) or longer
Round up the calculation result to the nearest 0.1kg. (Example: 18.04kg to 18.1kg)
Round up the calculation result in increments of 4oz (0.1kg) or round it up to the nearest 1oz.
(Example: 178.21oz to 179oz)
When connecting PEFY-P20VMA3-E, add 0.54 kg of refrigerant per indoor unit.
Outdoor unit model P200 P250 P300 P350 P400 P450 P500
Amount of pre-charged refrigerant in
the outdoor unit (kg) 6.5 8.0 11.5 11.5 11.5 11.8 11.8
Amount of pre-charged refrigerant in
the outdoor unit [lbs-oz] 14-6 17-11 25-6 25-6 25-6 26-1 26-1
Amount of added refrigerant (kg) = (0.29x L
1
) + (0.2 x L
2
) + (0.12 x L
3
) + (0.06 x L
4
) + (0.024 x L
5
) +
α
Amount of added refrigerant (oz) = (3.1x L
1
' ) +(2.15 x L
2
' ) + (1.29 x L
3
' ) + (0.65 x L
4
' ) + (0.26 x L
5
' ) +
α
'
Amount of added refrigerant (kg) = (0.26x L
1
) + (0.18 x L
2
) + (0.11 x L
3
) + (0.054 x L
4
) + (0.021 x L
5
) +
α
Amount of added refrigerant (oz) = (2.80x L
1
' ) +(1.94 x L
2
' ) + (1.19 x L
3
' ) + (0.58 x L
4
' ) + (0.23 x L
5
' ) +
α
'
L
1
: Length of ø19.05 [3/4"] liquid pipe (m)
L
2
: Length of ø15.88 [5/8"] liquid pipe (m)
L
3
: Length of ø12.7 [1/2"] liquid pipe (m)
L
4
: Length of ø9.52 [3/8"] liquid pipe (m)
L
5
: Length of ø6.35 [1/4"] liquid pipe (m)
α
,
α
': Refer to the table below.
L
1
': Length of ø19.05 [3/4"] liquid pipe [ft]
L
2
': Length of ø15.88 [5/8"] liquid pipe [ft]
L
3
': Length of ø12.7 [1/2"] liquid pipe [ft]
L
4
': Length of ø9.52 [3/8"] liquid pipe [ft]
L
5
': Length of ø6.35 [1/4"] liquid pipe [ft]
Total capacity of
connected indoor units
α
(kg)
α
' (oz)
- 80 2.0 71
81 - 160 2.5 89
161 - 330 3.0 106
331 - 390 3.5 124
391 - 480 4.5 159
481 - 630 5.0 177
631 - 710 6.0 212
711 - 800 8.0 283
801 - 890 9.0 318
891 - 1070 10.0 353
1071 - 1250 12.0 424
1251 - 14.0 494