14
T
SAM
T
SA
T
PAN_UI
T
PAN_UI
2°C
Ambient air probe SA
Air probe introduced into the SAM environment
Ambient air probe
located in the
UI panel
Time
Time
Temperature
Temperature
Resistor ignition delay (60s)
ZONE OF NON-ENABLING OF
THE REHEATING RESISTANCE
Resistance switch-off delay
Enabling the post ventilation resistance
Logic for adjusting the post-ventilation resistance
To enable the functioning of the post ventilation resistance, the user must work on the user interface panel by setting the AUX mode. The electronic board verifies the presence
of any post treatment coil of the air and performs the following check:
— if DIP3 = ON → enable the RXPOST if there are insufficient water conditions
— if DIP3 = OFF→no condition in relation to the water state
This inspection is intended to make the recovery unit use the heat source with greater thermal efficiency.
The control, when possible, tries to introduce “neutral air” into the room, keeping the TSAM value close to the TSA value. The constraint to be observed concerns the TSA tem-
perature which must not exceed the room setpoint value. This forcing is dictated by the principle that the post ventilation resistance must not be used to heat the rooms and
by a safety device in the control that tries to avoid continuous “tracking” of the TSA.
It should be noted that even in this functioning mode, the activation logic of the post-treatment resistance requires a post ventilation phase in relation to its deactivation.
To control the post-treatment resistive load, the regulator will be able to control the activation of the two electric loads in order to modulate the supplied heating capacity. The
activation of the electric loads follows the logic described in the following figure:
