EVCO EPK4BHQ1AH Installer manual - Manual (Page 89)

EVCO S.p.A. c-pro 3 NODE kilo AHU | Application manual ver. 1.0
page 89 of 114
6.17.2 Heat recovery devices with double coil
In order to utilize this recovery device it is necessary to set PG13=2. The recovery device with double coil is activated
via the exchange fluid pump between the two coils. In order to limit the pumps energy consumption, the activation
will be managed by the difference between the exhaust air temperature and outdoor air temperature (parameter Pr01
and relative differential Pr02). The circulation pump will stop during the free-cooling and free-heating phases.
This heat recovery device does not require its minimum exhaust temperature to be controlled since frost will not
accumulate inside the coil.
Note: the outdoor air temperature sensor must also be enabled (PH40=1). When the control sensors are in error the
function is disabled.
6.17.3 Rotating heat recovery device
In this case the heat recovery device can be controlled in two different ways: On/Off (PG13=3), or with an analogue
output (PG13=4) and is only active when the fans are turned on.
The heat recovery device will be deactivated during the free-cooling and free-heating phases.
PG13=3. Control On/Off
Note: the outdoor air temperature sensor must also be enabled (PH40=1). When the control sensors are in error the
function is disabled.
PG13=4. Modulating control
Pr01: Set Point Heat
OFF
| T.Exhaust – T.Outdoor | Pr02:
ON
Pr01: Set Point Heat
OFF
| T.Exhaust – T.Outdoor | Pr02:
ON