PLUS
300 EXPERT
U THR
Pag. 26
USE AND MAINTENANCE MANUAL
Rev. 01-18
PAUSE
The refreshment is a phase of the pause process of the temperature and humidity
management. Refreshments are managed with parameters Pr and dr.
Pr defines the interval between one refreshment and the following one, dr defines the
duration of the refreshment.
It is possible, at any time, to force an air change with the UP
key (a defrosting is
also simultaneously activated).
To interrupt a refreshment, position the control in stand-by (the times are reloaded).
DEFROST
Defrosting can be managed with parameters d4, d5, d6, d7, F5 that define the intervals,
the maximum duration, the defrosting end temperature, the dripping and the fans stop. To
manually activate defrosting it is sufficient to press the UP
key. Defrosting is not
activated in case the temperature set for defrosting end (d6) is lower than the temperature
detected by the evaporator probe. Defrosting will complete upon reaching the defrosting
end temperature (d6) or for defrosting maximum duration (d5).
HOT GAS DEFROST
Set parameter d1=1 for managing cycle inversion defrosting.
The compressor relay and the defrosting relay are activated for the entire defrosting
phase.
For the correct management of the plant, it will be the responsibility of the installer to use
the defrost output, that must allow the opening of the cycle inversion electrovalve and the
closing of the liquid electrovalve.
For the capillary plants (without thermostatic valve) it is sufficient to control the cycle
inversion electrovalve using the defrosting relay control.
5.20
5.19
5.18
CHAP. 5 - Parameters programming
