Initial Check - Hitachi CH-UNIT CH-4.0NE Manuel D'installation Et De Fonctionnement

4.2. INITIAL CHECK

4.2.1. Install the CH unit with a proper clearance around it for maintenance working space, as
shown in below figure:
Service Space
View from A
4.2.2. Flowing sound of refrigerant may be heard from the CH unit when the solenoid valve in
the CH unit is activated. Therefore, take the following action to minimize the sound.
- Install the CH unit inside the ceiling. As for the ceiling material, select a material like a plaster
board which minimizes operation sound.
- Do not install the CH unit in near a bed room or hospital room.
- Do not install the CH unit in a hot or humid place like kitchen to prevent dew condensation on the
outer surface of the CH unit.
4.2.3. Pay attention to the following points when the CH is installed in a hospital or other
facilities where there are electronic waves from medical equipment.
- Do not install the CH unit where the electromagnetic wave is directly radiated to the electrical box
or intermediate wiring (operating line).
- Install the CH unit and components as far as practical or at least 3 meters from the
electromagnetic wave radiator.
- Install a noise filter when the power supply emits harmful noises.
CH UNIT INSTALLATION
No Description
Electrical Box
Service Access Panel
Mark Dimension (Min).
Model CH-4-0/8.0 CH-12.0
a 250mm 350mm
b 100mm
7