Ventilation - Honeywell 5701 Operating Instructions Manual

MAN0443.P65 Issue 13 Aug 04
05701-M-5001 A02279
CHAPTER 4 - INSTALLATION INSTRUCTIONS
6.

VENTILATION

The System 57 Control System provides the facility for a large number of
channels in a very small space. In heavily populated racks, especially
those with many catalytic input control cards or relays configured for
normally energised operation, it is possible for the heat dissipation to
cause a significant rise in temperature both within the rack and in an area
close to the rack.
As such, careful consideration must be given to thermal planning. To
achieve most from the convection cooling, always ensure that the air can
flow freely through the rack and power supply. Do not obstruct the air vent
holes in the top and bottom of the rack and if possible space the control
cards evenly within the rack.
It is recommended that during commissioning the operating temperature
of the rack is checked to ensure that the maximum operating temperature
of 55°C is not exceeded. In some cases the addition of forced air
ventilation may be required.
Maximum power supply configuration allowed without provision for
additional ventilation is 100w for 8 way cabinet and 200w for 16 way
cabinet.
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5701 Control System