EVAPCO Eco-Air, Руководство пользователя

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32
Controller User Manual
Figure 55
The EC Fan Fail Safe Screen.
A secondary setpoint may be used to control the process temperature and may be activated via the scheduler, an ambient
temperature, or a digital input. If the secondary setpoint is to be activated via a digital input, consult the supplied wiring diagram to
determine the proper wiring configuration. If the secondary setpoint is to be set via an ambient temperature, additional parameters
will be shown as seen in Figure 56. Consider a situation where the secondary setpoint will become active when the ambient
temperature is 60.0°F with a differential temperature of 1.0°F. Until the ambient temperature reaches 61.0°F (the ambient setpoint
plus the differential), the primary setpoint will be used. Once the ambient temperature increases to 61.0°F, the secondary setpoint
will become active until the ambient temperature drops below 60°F.
Enables or disables the failsafe feature.
The amount of time that must elapse before the failsafe feature
is activated.
The fan motor speed at which the fans will run if the failsafe
feature is initiated.
No
30 seconds
100%
Parameter
Description Default
Table 19
The failsafe mode parameters.
Enable Failsafe
Delay Time
Speed
Figure 56
The Secondary Setpoint Trigger Selection Screen is set to ambient.