Common Work For High Temperature Side And Low Temperature Side; Release Gas; Securing Work Space; Tool Connection - Panasonic MDF-DU702VH Service Manual

■Common work for high temperature side and low temperature side

1. Release gas

１.１Securing work space
Preparations ：Alarm （Note: Alarm should be operated at all times during work）
Procedure： Move to the space where you can work the product, open the window / door and
set the alarm on the floor within 50 cm radius from the unit.
Note：Alarms are generally for one type of gas and there is no mode switching function according
to multiple gases. Use a detector for detailed measurements such as exploration
of gas leakage location.

1.2 Tool connection

Preparations ： Detector, dedicated GM, piercing tool, long hose, charge hose, branching
instruments, tools, leak check spray (liquid detergent can also be substituted)
Procedure ：
Refrigerant port
Outdoor
Vacuum port
Long hose
Note：Make sure connection is not leaky.
Although connection to Dedicated GM can be done by hand tightening, confirm that
there is no leakage from the connection part when starting gas flow. Make sure there is
no break in the middle of the hose (especially long hose).
Alarm
Connect piercing tool, charge hose, dedicated GM, long hose, as shown below,
and lead the long hose tip outdoors.
Dedicated GM
VR
VC
VG
VC
VG
VH
VR
-38-
Product
Compressor
Radius;50cm
VH
VL
Valve state
open shut
○
○
○
VL
○
○
High pressure
port
Low pressure
port
Charge hose
Piercing tool