Check and Test Operation 
Check
Be sure to check the following again after completion of installation.
1.Check the piping connection area for any gas leakage.
Indoor 
connection 
area 
Outdoor connection area
2. Is the drain hose properly connected?
3. Is the insulation of the piping in good condition?
Pipe insulator (Over 7mm foamed
polyethylene or EPDM foam)
Pipie connection part insulator (Over
5mm foamed polyethylene)
4. Is grounding properly made?
More than 30cm 
