1. System Installation Requirements
1-4
TI 33Q01J10-01E
Outlets for Maintenance
Outlets (approx. 1.5 kVA) for measurement devices should be provided near the installed
equipment for maintenance.
Telephone
Telephones should be installed for communications with related stations.
Air Conditioner
The air conditioner should be operated following the conditions below to prevent dew condensing
on the installed equipment:
• Keep the change of temperatures within ±10 °C/h.
• Install air conditioner away from equipment.
• Install substitute air conditioners to prevent dew condensing as a result of temperature rise
or fall if an air conditioner fails.
Windows
Close the windows of the control room. If a draft comes in around the windows, seal around the
windows.
Opening the window while air conditioning is running may result in condensation forming, or let in
dust or corrosive gas, adversely affecting the installed equipment. Windows on the sea side must
be closed to keep out salt air.
Install blinds, if necessary, to prevent sunlight reflecting from CRT displays and LCDs.
Side-by-Side Cabinet Installation
When cabinets are placed side by side, make sure of their ventilation system.
For cabinet ventilation system, we have air-cooling without blower and with blower. Moreover,
either blast fan pressurization (door fan) or exhaust fan (ceiling fan) is used for air-cooling with
blower.
As cabinets with the same ventilation system can be placed side by side, group them according
to ventilation system and place them in the same group side by side with side board.
CENTUM VP, CENTUM CS 3000 and CENTUM CS cabinets get air from the bottom front
and rear of the cabinet doors, and emit air from the top front and rear of the doors, using a “fan
pressurization” system. On the other hand, CENTUM-XL cabinets get air from rear of the doors,
and emit air from the top of the cabinets, using an “exhaust fan” system.
When cabinets with different ventilation systems are placed side by side without using side
board, a special partition board must be placed between cabinets. For the board, please contact
Yokogawa sales.
Sep. 30, 2008-00