94
Charging refrigerant
Module installation
X
f
Open the manifold gauge valve connected to the liquid side service valve and add the liquid refrigerant .
X
f
If you cannot add the whole quantity of the refrigerant while the outdoor unit is stopped, open the gas side and
liquid side service valve . Then, add remaining refrigerant by pressing the refrigerant adding button of the outdoor
PCB .
X
f
If you use the refrigerant charging function from the PCB, outdoor unit will operate and charge the refrigerant . At
this time, you must use gas side manifold gauge for cooling operation and use charging port for heating at the
manifold gauge for heating operation .
Gas
side
Scale
R-410A (Inject
liquid refrigerant)
Liquid side
Vacuum port
Liquid side pipe
Service valve
Outdoor unit
Outdoor unit
Manifold gage
• Open the gas side and liquid side service valve completely after charging the refrigerant . (If you operate
the air conditioner with the service valve closed, the important parts may be damaged .)
• Put on safety equipment when charging refrigerant .
• Do not charge the refrigerant when you adjust or control other product such as indoor units or EEV kits .
• If you charge the refrigerant with the front cabinet open, be very careful with the fan on the top of the
product to prevent personal injury .
• When the ambient temperature is low in winter time, do not heat the refrigerant container to speed up the
charging process . There is risk of explosion .
• Beware for possibility of refrigerant leakage when you connect the manifold gauge to the charging port
for heating .
• Close the valve of the refrigerant container immediately after charging the refrigerant . If not, there might
be a change in entire amount of refrigerant .
CAUTION
Using service valve for gas
X
f
After charging the refrigerant, close all caps as shown in the
illustration .
X
f
Tightening torque for the cap of refrigerant charging port
10~12 N
·
m
X
f
Tightening torque for the cap of control part 20~25 N·m
X
f
Opening/closing torque for the valve
- Over Ø 19 .05 : 10 .0 N·m
Cap for the control part
Cap for the refrigerant
charging port
DVM S HE_IM_DB68-05461A-08_EN.indd 94
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