EVCO c-pro kilo AHU - Manual (Page 71)

C-PRO KILO AHU APPLICATION MANUAL
Pag. 71
6.12 Heat Recuperators
When the quantity of renewed air is substantive the air treatment centers provide a system
which recovers the expulsion air for a better exercise of energy costs. Using the parameter
(PG13>0) it is possibile to utilize the heat recovery by selecting one of the following
different recuperators:
- PG13 = 0: Management disabled
- PG13 = 1: Recuperator at cross flow
- PG13 = 2: Recuperator at double coil
- PG13 = 3: Recuperator rotating On/Off
- PG13 = 4: Recuperator rotating modulating
Recovery management presupposes that the expulsion air temperature probe is present,
therefore in order to utilize the recovery the probe will need to be enabled by setting
parameter PH42=1.
6.12.1 Recuperators at cross flow
In order to utilize this recuperator set PG13=1. The recuperator provides a by-pass shutter
which is used to prevent the passage of external air through the air exchange channels. The
recuperator is normally always active and is by-passed during the free-cooling/free-heating
phases or during the defrost cycles with external temperatures that are too low. Set the
setPoint (Pr03) and the relative differential (Pr04) in order to activate the defrost cycle.
When the minimum temperature conditions of the expulsion air are reached, as represented in
the diagram, a cyclical sequence of recuperator by-pass are activated in order to permit the
expulsion air (hot, ambient air) to defrost the air exchange channels.
Pr03: Set Point
OFF
Pr04: Diff.
ON
T. Expulsion
OFF
ON
Minimum expulsion temperature
Shutter By-Pass
OFF
ON
Pr05 Pr05