Aiphone RAX R24/A - Manual (Page 9)

V. Installation Guidelines
BE SURE TO TURN OFF RAX POWER SUPPLY BEFORE YOU OPEN THE UNIT OR
MAKE WIRING CONNECTIONS.
1. Central Exchange Unit (CEU);
* Select location for CED that will facilitate ease of access to the unit itself.
* Plug the power supply into a clear line. Interference on the power line may cause function error.
* Select a location that:
— has low humidity.
— is free of dust.
— is vibration free.
— is free of static electricity.
— is not near flammable or chemical product.
— is not close to high voltage equipment.
— is not within a strong magnetic field.
— is not near heating or air conditioning outlets or equipment.
— does not have direct sunlight.
— does not have temperature extremes: below 0°C (+32°F) or above + 40°C (+104°F).
2. Station;
* Each station must be home run wired to the C.E.U. individually, and must have individual station numbers.
* Follow location guidelines for the Central Exchange Unit when selecting station location.
* Avoid locations where temperature dips below —10°C (+14°F) or exceeds +60°C (+140°F).
* Select a most suitable type of station according to your communication requirements and environmental conditions.
3. Wiring;
* Use 2 twisted pairs for each station.
* Keep twisted pair cable well apart (over 50 cm or 20") from other cables such as heavy duty power lines, telephone
lines and/or paging amplifier output line (speak line).
4. Installation;
* In new construction install single-gang box for RA-A or RA-D stations or electrical box (see page 14) where
RA-B or RA-C stations are to be wall-mounted. The station will cover the hole, when installed.