Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 871

9) Drainage test
a) During trial operation, make sure that drainage is properly execued and check that leakage is not found at connections.
b) Be sure to carry out a drainage test when installing the system during a heating season.
c) When installing the system in a building under construction, carry out the drainage test before ceiling tiles are installed.
1 Supply approx 1000cc of water through the outlet of the unit using a feed water pump.
2 Make sure that drainage is proceeding properly at the see-through outlet of the unit.
* Also confirm the revolving sound of the condensate motor when checking the drainage.
3 Then remove the drain plug at lower section of the unit to drain water off. After making sure water is not left, restore the
drain plug to the original position.
10) Drainage from the lower drain socket
Only if the drain pipe can be in-
stalled in a downhill grade (1/50-
1/100), the lower drain socket can
be used for connecting to the drain
pipe as illustrated.
( Disconnect the connector for the
drain motor)
As shown in the sketch to the right,
disconnect the drain motor con-
nector CnR ( blue color coding).
If the system is started with this
connector connected as is, drain
water is discharged out of the up-
per drain socket causing a heavy
water lekage.
Insert a water filing hose by approx 50 mm and feed water.
(Be sure to insert the water filing hose in a downward direction.)
Remove the grommet.
Be sure to restro it to the original
position after the test is over.
(Piping connection)
The lower drain socket
FDC-HKX
The upper drain socket
A hard PVC general-purpose pipe
Heat insulator
Rubber plug
(Remove the rubber plug)
Disconnect Condensate
motor connector
CnR (2P Blue)
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