CLIMATIC™ 50 User manual - Lennox

VENTILATION
ON / OFF (Start & Stop)
Function
In general, the unit is considered in operation if its supply fan is in operation.
But, according to the set points, the fan may stop in the temperature control dead zone.
Description
To allow the operation of the unit it is necessary that set point 3111 is set to `On' and that the BM50 logical input ID7 on
the J5 connector is closed.
The 3111 set point adjustment is available on the DC/DM50 with the ON/OFF functionality.
For each scheduled zone defined in Climatic50, it is possible to set the start/stop state. This functionality allows the
unit to stop during a period of time in the day.
When the Room temperature is within the regulation dead zone, for each scheduled zone defined in the Climatic50 it is
possible run or stop the fan
3111 � Main On/Off.
3351 � On/Off, adjustment by zone.
3352 � On/Off in the temperature control dead zones, adjustment by zone.
STAGGING START
Function
After a power shut-down, you may get the units to restart gradually in order to avoid overloading issues.
Description
The units do not need to be connected; they must simply have different pLan addresses, (see BM50 pLan address
configuration).
This will enable them to restart (10 x their address number) seconds after the resumption of the power.
Example:
If a unit carries the address n°3, it will start again 30s (3 X 10 seconds) after the resumption of the power.
HIGH EFFICIENCY FANS or/and WITH VARIABLE SPEED TRANSMISSION
Function
The supply fan variable speed option allows two functionalities;
Progressive start or stop (used for the textile duct inflation)
The speed reduction, in temperature control dead zone, in order to bring only the necessary fresh air quantity.
Description
The supply fan speed is originally fixed by the set point 3422.
The speed entered in this set point corresponds to nominal air flow of the installation. This set point can only be adjusted
on site.
Progressive Start / Stop
If set point 3423 is activated;
During fan start up, for 30s, the speed is fixed by the threshold set point 3421. Then during the next 30s the fan
accelerates gradually to reach the speed fixed in the set point 3422.
During the fan stop, the speed gradually reduces to stop completely in 1 minute.
CLIMATIC50 – IOM – Rooftops/ Aircoolair CL50-ROOFTOPS-IOM-1107-E 13