ENGLISH
42
NT_51897201_RHE-AN_130516.docx
Servicing / replacement of the fans
9.5
Periodically, dust can be deposited on the fan ; the dust therefore has to be removed.
To extract the fans :
Switch off the electrical power supply with the main circuit breaker.
Open the access door.
Disconnect the power and control connectors on the side.
Disconnect the pressure tap.
Using a Ø 13 mm wrench, unscrew the two M8 screws of the plate
support.
Remove
the
fans.
Using a damp cloth, clean the fan – do not spray on the fan.
Reinstall the fan by reversing the steps of the removal procedure.
Servicing / replacement of the electric heater
9.6
Before the cold season, remove dust from the heating resistances with
compressed air or using a vacuum cleaner and a soft-bristle brush. Visually
check the condition of the components and retighten the connections, if
necessary.
Switch off the electrical power supply with the main circuit breaker.
Open the access door.
Visually check the condition of the components and retighten the
connections.
Warning : Do not rip out or damage the cables by pulling on the heater.
Servicing / replacement of the water coil
9.7
To preserve the coil’s characteristics, drain the water circuit once a year.
Depending on the ambient pollution and despite filtration, dust can be deposited on the coil.
After removal, the coil can be cleaned using a water spray, steam, compressed air ; carefully proceed so
as to not damage the coil’s fins.
For units equipped with reversible cold coils (DFR), clean the condensate dip tray with water and a non-
abrasive detergent. Make sure that the water is properly drained and check the siphon.
Replacement of the CORRIGO programmable logic controller heater
9.8
When the
heater low
alarm appears and the red indicator light is lit, it means that the backup heater to
save the memory and the real time clock is too low.
The procedure to change the heater is described below.
A capacitor allows backing up the memory and running the clock for approximately 10 minutes after the
power is switched off.
If the heater can be changed in less than 10 minutes, the program does not have to be reloaded and the
clock will continue to run normally.
The spare heater is type CR2032.
Using a small screwdriver, pry up the clips on each side of the case to release the cover from the base.
Hold the base and remove the cover.
