Cleaning Of Kpi Units - Hitachi RCI-1.0FSN3 Service Manual

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.

12.1.3 Cleaning of KPI units

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.
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SMGB0077 rev.0 - 01/2013
to protect the fins.
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