Maintenance - Hitachi RCI Service Manual

2 Unit installation
Check that the nuts and washers are correctly secured with the suspension bracket retainers and fit the brackets onto their
nuts and washers on the other side.
C A U T I O N
• Before lifting the unit, prepare any necessary means (ladders, scaffolding, elevator platform, etc.) and check
that the current safety regulations in the place where the installation is taking place are met.
• Check that the lifting work can be carried out without the risk of injuries to you or others in the surrounding
area.
• Request the assistance of another person to lift the unit.
Lift the unit carefully.
C A U T I O N
The unit control box is fragile. Do not apply force to the control box.
A: KPI unit.
B: suspension bolt.
C: rubber insulation.
D: washer.
E: lock nut.
Apply a thread-locking product to the bolts and nuts to prevent them from loosening. Otherwise, abnormal noise may be
caused by mechanical vibrations and the indoor unit may become loose.
Apply protective paint to the bolts and nuts to prevent rusting.
C A U T I O N
Completely cover the unit with a sheet of plastic to protect it during installation work.

2.10.3 Maintenance

Clean the heat exchange unit: at least every two years.
Regularly clean the air filter: at least twice a year.
C A U T I O N
• Completely disconnect the power supply before carrying out maintenance work.
• Wait five minutes after switching off the power supply to the unit before starting any cleaning operations.
• Wear suitable gloves to avoid injuries when handling the unit.
• Do not start the system without the air filter to avoid blockages in the total heat exchanger.
67
SMGB0063 rev. 1 - 10/2010
2