Hitachi RCI Service Manual page 389

12 Maintenance notes
Follow the steps below to wash with clean water:
1 Set the water pump pressure to between 2.5 and 5 kg/cm
2 Start the water pump and wash the fins with clean water.
Work and checks after cleaning
1 Measure the drainage pump insulation using a megohmmeter, check that the insulation is over a 1 MΩ on applying 500
V.
2 Pour water into the drain pan to check that the water flows easily.
3 Remove the vinyl sheets.
4 Fit the fan cover and fit and tighten the cover securing screws.
5 Fit the partition plate and fit and tighten the plate securing screws.
6 Fit the following components:
a Fan motor.
b Liquid and gas piping thermistors.
c Air filter.
d Discharge air grille.
e Side panel.
N O T E
The cleaning product is neutral. However, after it has been used the cleaning water may no longer be neutral.
7 Collect the cleaning water and apply the neutralisation treatment once you have disposed of it.
¿ KPI - Fan units with energy recovery
Filter maintenance
Preliminary procedures
Turn off all power supply switches before starting maintenance work.
Wait 5 minutes after stopping the unit before starting the cleaning procedure.
Do not start the system without the air filter to avoid blockages in the total heat exchanger.
D A N G E R
Wear gloves to avoid injuries when handling the filter.
N O T E
• Clean the heat exchanger unit once or more every two years.
• Clean the air filter more than once a year.
KPI-552H2E
Pull the hinges back.
Open and remove the service cover.
377
SMGB0063 rev. 1 - 10/2010
2
to protect the fins.
12