Operating Sequence; General; Occupied Mode; Unoccupied Mode - Prolon C1000 Series Hardware Manual

Operating Sequence

General

The ProLon C1000 Basic Rooftop controller receives readings from three temperature sensors located
outside, in the return duct and in the supply duct. Also, as a Master device, it receives data from the
zone controllers sent on the network bus. A dry contact originating from an external timer signals the
occupancy status (optional) to the Master. The controller then analyzes all the data and demands sent
by the zones and commands the appropriate outputs to respond accordingly, within parameters set
by the temperature sensors and other safety limits. The Master sends back information on its network
such as supply air temperature, occupancy status and other relevant data for the zone controllers to use.

Occupied Mode

The controller operates the fan. When there is a cooling demand from the zones, the Rooftop controller
will activate the cooling outputs as long as all temperature limits, delays and other related parameters
are respected. Once the demand is satisfied, the outputs are deactivated within the prescribed minimum
on/off time delays.
When there is a heating demand from the zones, the Rooftop controller will activate the heating outputs
as long as all temperature limits, delays and other related parameters are respected. Once the demand is
satisfied, the outputs are deactivated within the prescribed minimum on/off time delays.
When there is no cooling or heating demand from the zones, only the fan is enabled. If the heating equip-
ment permits, a supply air pre-heating sequence may be enabled. This allows cold mixed air to be heated
to a more comfortable level for subsequent use by the zones for ventilation.

Unoccupied Mode

The fan can be configured to operate in intermittent mode. When there is a cooling or heating demand
from any single zone, the Rooftop controller will activate the fan and the cooling outputs as long as all
temperature limits, delays and other related parameter are respected. Once the demand is satisfied, the
fan and cooling outputs are deactivated within the minimum on/off time delays set.
During the unoccupied period, the Rooftop controller can be driven by the highest demand on the
network and will operate the fan and relevant outputs accordingly.
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REV. 6.1.6 / PL-HRDW-RTU-C1000-C/F-EN