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EXPERT 64EU rev.03
EXPERT 64EU
6.2
Fan Stages
6.2.1 Principle of Operation
6.2.1.1
Main Operation of the Fan Stages
The controller can use up to 15 On-Off fan stages. These stages operate in a sequence
to increase the level of ventilation as the room temperature increases. Each stage can
also activate two variable outputs and a combination of timer relays for cooling
purposes. Note that fan stage 1 can only operate variable outputs. The user defines a
start and a stop temperature for each stage. A stage is activated when its start
temperature is reached. It is deactivated when the room temperature decreases to its
stop temperature.
Fan stages’ start temperatures are defined with respect to the set point and with
respect to each other. This means that when one of these values is adjusted, all the
consecutive values are adjusted by the same amount. For example, if the set point is
increased by 1°F, the start temperatures for all fan stages will be increased by the
same amount.
Timer Relays for Cooling Devices:
Fan stages can activate relays that
operate following a timer. This is
useful to activate a mist unit that
follows the ventilation’s progres-
sion. The timer is made of an On
Time and an Off time. Refer to sec-
tion 4.6.2 to activate timer relays
on fan stage and refer to section
GRAPHIC:
Fan Stages’ Timer
ON
ON TIME
OFF
OFF
TIME
GRAPHIC:
Ventilation Stages
STAGE Y
VENTILATION
LEVEL
ROOM T°
STAGE X
STAGE X FANS
TURN ON
STAGE X FANS
TURN OFF
STAGE Y FANS
TURN OFF
STAGE Y FANS
TURN ON
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