Lennox CLIMATIC II User Manual

V2.2
-00
4
CONTROL OF EVAPORATOR PUMPS
Function
To control the flow of refrigerant in the evaporator
Description
There are two possible types of regulation, defined by the variable C2POMPE.
¶ If C2POMPE = 0, the CLIMATIC controls one pump or none.
· If C2POMPE = 1, the CLIMATIC controls two pumps in normal / standby mode.
The user configures the C2POMPE parameter through switch 1 (or SW1) of CPU card.
F Case ¶ :
The pump POMPE1 is in service if all the following conditions are satisfied:
ð At least one on / off circuit n is ON (MAARn = 1). *
ð The remote on / off switch for the machine is ON (MAARD = 1). *
ð This is not an idle period (INOCCUP = 0). *
ð The pump has been off for 1 minute or is already in operation.
ð There is no electrical fault on the pump (DELECP1 = 1).
ð There is no flow fault on the pump (DSDEB1 = 0).
* Cette condition n'est pas prise en compte si l'option "relance hors gel de la pompe" a été choisie et la
température d'air extérieur est inférieure à 2°C.
* This condition is not taken into account if the "anti-freeze pump start-up" option has been selected and the
outside air temperature is less than 2°C.
POMPE1 is always controlled by the CLIMATIC even if the installation pump is not electrically controlled by
the refrigeration unit.
If the customer controls the pump, he/she must comply with the following procedures:
• Pump start-up 1 minute before confirming the remote on / off switch for the unit.
• Pump off at least 2 minutes after MAARD is switched to 0.
F Cas · :
The pump POMPEk is in service if :
ð At least one on / off circuit n is ON (MAARn = 1). *
ð The remote on / off machine is ON (MAARD = 1). *
ð This is not an idle period (INOCCUP = 0). *
ð Pump POMPEk has priority (PRIP = k-1).
ð The pump has been off for 1 minute or is already in operation.
ð There is no electrical fault on the pump (DELECPk = 1).
ð There is no flow fault on the pump (DSDEBk = 0).
* This condition is not taken into account if the "anti-freeze pump start-up" option has been selected and the
outside air temperature is less than 2°C.
The pump priority changes automatically once a week, on Monday at 6 p.m..
In the event of a fault occurring on the pump in service, the unit automatically transfers to the second pump,
on condition that the latter is available.
Note: The CLIMATIC waits 2 minutes before stopping the pumps after a request to stop the machine or
circuits, to avoid any risk of the evaporator freezing.

Lennox CLIMATIC II Specifications

General

Brand	Lennox
Model	CLIMATIC II
Category	Control Unit
Language	English