Lennox CL50-RoofTop

CLIMATIC™50 – IOM – Rooftops/ Aircoolair CL50-ROOFTOPS-IOM-1107-E
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SUPPLEMENT OF HEATING (Option)
Fonction
Units may be equipped with 3 types of supplementary heating:
Gas (BG, FG et BD, FD)
Hot water coils (BC, FC et BH, FH)
Electric heaters (BC, FC et BH, FH)
From a room temperature need (Capacity Factor) the supplement of heating stages are started and stopped with a pre-
determined order.
Description
Operation priority, Compressors / Additional heating
From factory setting, in heat pump mode, Climatic™ starts compressors first and then if necessary, starts additional
heating.
This sequence may be reversed with set points for the ambient temperature regulation and for fresh air pre-heating.
3324 ! Priority inversion from compressors to supplementary heating, air temperature regulation, adjustment by zone.
3332 ! Priority inversion from compressors to supplementary heating, fresh air regulation, adjustment by zone.
Operation authorization
The user may choose to limit the operation of the compressors by using contacts or set points modification.
Set points
Stop of additional heating if the set point (3357) is set tp ‘No’.
Note: The address (3357) can be set differently for zones A, B, C, Ino ou GTC
Contact
Stop of the gaz module if the free contacts [Dis. Cp/Ah] or [Dis. AuxH.] are closed. (See Customized Input / Output
(BE.50)).
3357 ! Supplementary heating authorization adjustment by zone.
ELECTRICAL HEATERS
Electrical heaters are stopped if the outside temperature is above a threshold in set point (3721).
The capacity of electrical heaters piloted by a Triac may be limited. The set point (3723) fixes the maximum threshold.
For electrical heaters piloted by a Triac and positioned before the coil, if the mixing air temperature is below the threshold
in set point (3722), the electrical heaters are activated to 100%.
For electrical heaters piloted by a Triac and positioned after the coil, if the blowing air temperature is below the threshold
in set point (3722), the electrical heaters are activated to 100%.
Pour les résistances électrique pilotées par Triac et positionnées après la batterie de détente directe ; si la température
de soufflage est inférieure au seuil de la consigne 3722 les résistances sont activées à 100%
3721 ! Outside air temperature threshold for electrical heaters authorization.
3722 ! Minimum temperature threshold, Triac.
3723 ! Maximum capacity threshold, Triac.
HOT WATER
Protection against freezing with minimum water flow.
If the outside air temperature is below the set point (3331), the valve will open to a minimum fixed in the threshold (3332).
Freezing fault
In general, in case of detection of hot water coil icing, the valve will open to 100%. Due to certain hydraulic network,
pumps or tracing, the coil protection is done by closing the valve. This can be activated with the set point 3733.
3731 ! Outside air temperature threshold for authorization, minimum water flow.
3732 ! Valve opening threshold , minimum water flow.
3733 ! Valve action in case of freezing fault.