Installation Space; Installation Procedure; Electrical Wiring; Connection Scheme - Hitachi PC-ARF Technical Catalogue

8 Control support devices
PC-AMTB

8.5.2.6 Installation space

Please consider that installation space must be wide enough for wiring connection.
Units: mm

8.5.2.7 Installation procedure

PC-AMTB enclosure is furnished with side bored flanges in order to easily screw it to a wall or vertical surface by using 4
screws M4 or 4 mm diameter, tapping type (field-supplied).
It can also be left lying on a flat surface such as a false ceiling.

8.5.3 Electrical wiring

8.5.3.1 Connection scheme

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Power supply installation
The installation must be provided with an independent low voltage power supply circuit of 24 V AC or DC type. Power sup-
ply cable sizes must be designed considering that max. voltage dropped is not exceeding the 10%.
N O T E
• It is recommended to use 0.75 mm2 wires as minimum cable size, not lighter than the polychloroprene sheathed flexible cord (code
designation 60245 IEC 57) type.
• Do not connect more than 8 devices in serial or increase power supply cable size accordingly.
The power supply must be capable enough to supply the necessary power required base on the following formula:
Where:
• NAtype: Number of multitenant devices installed to A type indoor units.
• NBtype: Number of multitenant devices installed to B type indoor units.
The installation must be equipped with disconnection devices permitting any servicing operation without power.
739
TCGB0106 rev.0 - 12/2014
Upper view
P (watt) ≥ ( (NAtype*4.7 +NBtype*7)*0.7
power supply
Front view
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