Additional Refrigerant Charge - MAXA 3500 W Manual Usuario/Instalador

6. Loosen and remove the cap of stop valves A and B to open stop valve A and B completely, then fasten the cap.
7. Disassemble the charge hose from the service port of stop valve A, and fasten the nut.

6.8 Additional Refrigerant Charge

- Refrigerant cannot be charged until field wiring has been completed.
- Refrigerant may only be charged after performing the leak test and the vacuum pumping.
- When charging a system, care shall be taken that its maximum permissible charge is never exceeded,
in view of the danger of liquid hammer.
!
CAUTION
- Charging with an unsuitable substance may cause explosions and accidents, so always ensure that
the appropriate refrigerant is charged.
- Refrigerant containers shall be opened slowly.
- Always use protective gloves and protect your eyes when charging refrigerant.
■ The outdoor unit is factory charged with refrigerant R410A. Calculate the added refrigerant according to the diameter
and the length of the liquid side pipe of the outdoor unit/indoor unit connection.
R (g)
No added refrigerant R(g) when L(m) is length less than 5m (one-way)
Added refrigerant when the pipe length L(m) is over 5m (one-way)
R(g): Additional refrigerant to be charged
L(m): The length of the refrigerant pipe (one-way)
D(mm): Liquid side piping diameter
 NOTE: If a negative result is gotten for R from the formula at right, no refrigerant needs to be added nor removed.
■ Install the drain joint of the outdoor unit
Fit the seal into the drain joint, then insert the drain joint into the base pan hole of outdoor, rotate 90 to securely
assemble them. Connect the drain joint with an extension drain hose (Locally purchased), in case of the condensate
draining off the outdoor unit during the heating mode. (Refer to Fig.6-17)
O utdoo r
unit
A
B
Stop v alve
Man ifo ld va lve
Multi-me te r Pr essure meter
-76 cmHg
Hi-le ve r
L o-le ver
Cha rge h os Ch arg e hose
L o-le ve r
Seal Drain joint
The base pan
of outdoor unit
In doo r
unit
Ga s side
C
Liq uid s ide
D
Fig. 6-12
Vacuum pu mp
Fig. 6-13
D(mm)
Ф6.35
-----------
15g/mx(L-5)
The base pan hole
of outdoor unit
Seal
Drain
joint
Fig. 6-17
67
Ф9.52 Ф12.7
----------- -----------
30g/mx(L-5) 60g/mx(L-5)