Operating Sequence; General; Occupied Mode; Unoccupied Mode - Prolon C1050 Series Hardware Manual

Operating Sequence

General

The Prolon C1050 Heatpump controller receives readings from three different temperature sensors: outside air, return
air and supply air. Also, as a Master device, it receives data from the zone controllers or thermostats sent on the network
bus. 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. When working as a
network Master, it sends back information to 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 Heatpump controller will put the
reversing valve into cooling mode and activate the compressor 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 and the outside temperature is above the low balance point, the Heat-
pump controller will put the reversing valve into heating mode and activate the compressor outputs as long as all tem-
perature limits, delays and other related parameters are respected. If the outside temperature is below the low balance
point, the controller will activate the auxiliary heating outputs. If the heatpump is configured for water-to-air mode, the
low balance point is ignored and the use of compressors is permitted all year round. Protection sequences are in place
that will activate auxiliary heat upon failure of the compressors. Once the demand is satisfied, the outputs are deactivat-
ed 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 equipment 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 Heatpump controller will activate the fan and the necessary cooling or heating outputs as long as all tempera-
ture limits, delays and other related parameter are respected. Once the demand is satisfied, the fan and any cooling/
heating outputs are deactivated within the minimum on/off time delays set.
During the unoccupied period, the Heatpump 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. 7.3.0 / PL-HRDW-HP-C1050-C/F-EN