Adding Refrigerant - Toshiba MMY-MAP0804HT8JP Service Manual

Adding refrigerant

After finishing vacuuming, exchange the vacuum pump with a refrigerant canister and start additional charging of
refrigerant.
Calculation of additional refrigerant charge amount
Refrigerant charge amount at shipment from the factory does not include the refrigerant for pipes at the local site.
For refrigerant to be charged in pipes at the local site, calculate the amount and charge it additionally.
NOTE
If the additional refrigerant amount indicates minus as the result of calculation, use the air conditioner without
additional refrigerant.
Outdoor unit type
Heat pump
type
Charging amount (kg)
Outdoor unit type
Cooling only
type
Charging amount (kg)
Additional refrigerant charge
amount at local site
Table 1
L q i u d i p p i e d a i ( . m m )
Additional refrigerant amount/1m liquid
pipe (kg/m)
MAP080
MAP080
=
Real length of liquid pipe
6 4 .
0.025
MAP100
MAP100
10.5 10.5
Additional refrigerant charge
×
amount per 1m liquid pipe
(Table 1)
9 5 . 1 2 7 .
0.055 0.105
– 18 –
MAP120 MAP140
11.5
MAP120 MAP140
10.5 11.5
Corrective amount of refrigerant
depending on HP of co-
+
operating outdoor units
(Table 2)
1 5 9 . 1 9 1 .
0.160 0.250
MAP160
MAP160
11.5
2 2 2 .
0.350