EVCO EVFTFT618N7U - Manual (Page 33)

EVCO S.p.A. EVFTFT618 | Installer manual ver. 2.2 | Code 144FTFT618E224
Page 33 of 62
10.5 Management of the heating elements
During a heating request, the heating elements output will be activated, making the management of a switch-on/off duty-
cycle also possible, defined by parameters rH6 and rH7.
10.5.1 Cabinet step heating management
The desired set-point can be reached in the recovery and proving phases gradually, defining the number of steps to reach
the set-point and the percentage increase of the set-point for every step fixed.
For the recovery phase, the number of steps is defined by parameter rr0, while the percentage increases of the set-point
are given by parameters from rr1 to rr10.
For the proving phase, the number of steps is defined by parameter rL0, while the percentage increases of the set-point
are given by parameters from rrL1 to rL10.
Attention, it is the user's task to check the coherence of the number of steps set and the correct number of set-point
increase percentages. Example, if rr0 is equal to 4, only the parameters from rr1 to rr4 must be set.
10.6 Management of the steam generator
The steam generator output is active during all phases in which cabinet humidification management is envisioned.
10.7 Humidification management
The humidity in the cabinet can be managed with or without the use of humidity transducer, depending on the value of the
parameter rU0.
10.7.1 Management of humidity without transducer (rU0 = 1)
In this case, the humidifier output will remain active for a variable duty-cycle according to the humidity set-point set for
the phase in progress.
The duration of the activations and deactivations of the output is given by parameters rU2 (humidification cycle time) and
the maximum humidification time to obtain 100% humidity inside the cabinet (rU3).
The activation times will therefore be a percentage of the parameter rU3, on the basis of the set-point set, which will
repeat every cycle time set with rU2.
10.7.2 Management of humidity with transducer (rU0 = 0)
The humidifier output activates when the humidity value inside the cabinet drops below the neutral area value (rU9) of the
humidification differential value (rU8). The activation percentage of the humidifier output will be proportional to the value
of the humidity with respect to the humidification proportional band value (rU10), on the basis of the humidification cycle
time (rU11) and a times base for said time (rU12).