Hexagonal Wrench Type; Pin Type; Refrigerant Charge; Additional Charge Amount - Mitsubishi Heavy Industries FDCA Series Technical Manual

S Models FDCA301~601

Hexagonal wrench type

Hexagonal Head Wrench
(M4)
• Open the valve rod until it touches the stopper. You need not apply lorce
to push it further.
• When an operation is completed, replace the cap nut and tighten it as before.
S Models FDCA801, 1001
Method of opening/closing a valve
• Remove the cap, turn the gas pipe side until comes to the "Closed"
position as indicated in the drawing on the right.
• For the liquid side pipe, turn with a hexagonal wrench until the shaft
stops. If excessive force is applied, the valve main body can be dam-
aged. Always use a dedicated special tool.
• Tighten the cap securely.
For tightening torque, refer to the table below.
For gas pipes
For liquid pipes

(4) Refrigerant charge

S Models FDCA301~601
(a) The outdoor unit is charged with enough refrigerant for a piping length of 30 m when it is shipped from
the factory, and additional charging is not necessary in the case of a system with 30 m or piping or less.
(b) If the system's piping exceeds 30 m, charge with an amount of additional refrigerant corresponding to the
additional length of piping in the system.
Item
Factory Charge Amount (for 30 m of pipe) (kg)
Additional Charge Amount (for each 1 m of piping) (kg/m)
(Example) If the FDCA301 model is newly installed and the piping length is 45 m.
Additional Charge Amount: 0.60 kg = (45 – 30) m
S Models FDCA801, 1001
(a) Additional charge amount
Item
Standard refrigerant
charge volume (kg)
Model
FDCA801
FDCA1001
Notes (1) The standard refrigerant charge volume shows the charge volume with the length of refrigerant piping is 0 m.
(2) Concerning the additional charge per meter of piping and the refrigerant charge volume when the unit is shipped from the factory, as shown in the above
the unit is charged with a portion of the refrigerant needed for the local piping, so be sure to calculate the amount of additional charge that is needed and
charge the system locally.
Open
Liquid/gas operation
Tightening torque N · m
Shaft Cap
(valve main body) (lid)
7 or less 30 or less
7.85 29.4
(MAX 15.7) (MAX 39.2)
(1)
Additional charge
volume per meter of
refrigerant piping (kg)
Main pipe
Liquid piping φ 9.52 : 0.06
6.3
Liquid piping φ 12.7 : 0.12
Branch pipe 0.06
Main pipe 0.12
7.3
Branch pipe 0.06

Pin type

Remove the hexagon cap nut, set it as illustrated in the
drawing below.
• When a pin setting operation is completed, replace the
cap nut and tighten it as before.
Cap nut
(check joint section)
13
8.8
(MAX 14.7)
Model
FDCA301 FDCA401
3.15 3.9
0.040 kg/m
(2)
Charge volume when
shipped from factory (kg)
Outdoor unit
6.6
7.9
114
- -
Sloppre
Pin
Factory setting
(close)
Closed position
Gas side service valve
Cap nut
Cap
Liquid side service valve
FDCA501 FDCA601
3.2 3.9
0.040
Local piping length for
which additional
charge is not required. (m)
5
Open
Opened position
Limit length of
refrigerant piping (m)
70