Adding Refrigerant - Toshiba MCY-MHP0404HS8-E Installation 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
Default refrigerant amount 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.
Outdoor unit type MHP0404
Charging amount (kg) 6.4
Additional
Real length of liquid
refrigerant charge =
pipe
amount at local site
Table 1
Liquid pipe dia. (mm) 6.35
Additional refrigerant amount /
0.025
1 m liquid pipe (kg / m)
Table 2
Outdoor unit type
Compensation by outdoor HP (kg)
Example: (060 type)
L2
L1
L4
A
L1 Ø9.52: 10 m L2 Ø9.52: 10 m
L5 Ø6.35: 3 m L6 Ø6.35: 4 m
Additional charge amount R (kg)
= ( Lx × 0.025 kg/m) + ( Ly × 0.055 kg/m) + ( 0.8 kg )
= ( 12 × 0.025 kg) + ( 28 × 0.055 kg) + ( 0.8 kg )
= 2.64 kg
Lx: Real total length of liquid pipe diameter 6.35 mm (m)
Ly: Real total length of liquid pipe diameter 9.52 mm (m)
EN-39
MHP0504 MHP0604
6.4 6.4
Additional refrigerant
Compensation by
charge amount per
× + outdoor HP
1 m liquid pipe
(Table 2)
(Table 1)
9.52
0.055
MHP0404 MHP0504
0 0.4
L3
L7
L6
L5
B C
L3 Ø9.52: 5 m L4
L7 Ø6.35: 5 m
Charging of refrigerant
• Keeping the valve of the outdoor unit closed, be sure to charge the liquid refrigerant into the service port at the
liquid side.
• If the specified amount of refrigerant cannot be charged, fully open the valves of the outdoor unit at liquid and gas
sides, operate the air conditioner in COOL mode, and then charge refrigerant into service port at the gas side. In
this time, choke the refrigerant slightly by operating the valve of the canister to charge liquid refrigerant.
• The liquid refrigerant may be charged suddenly, therefore be sure to charge refrigerant gradually.
MHP0604
0.8
D
Ø9.52: 3 m
– 20 –
Installation Manual
EN-40