Activation Of Heat Recovery - Carel pRack pR300T Mode D'emploi

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2.4 Activation of heat recovery

The heat recovery function can be implemented either via a digital output or a 0-10V analogue output. If
using a 0-10V signal, modulating or ON/OFF operation can be selected (see below).
ON/OFF VALVE
The configured thresholds are compared against the activation demand percentage calculated as described
in the previous paragraphs.
When this demand reaches (from below) the activation threshold, the output assigned to the heat recovery
function is activated, following the defined activation delay.
Deactivation threshold
0-10V VALVE
If using an analogue signal, modulating or ON/OFF operation can be selected.
Modulating operation
cod. +030220595 - 1.2 - 13.08.2020
Activation is based on the following three parameters,
modifiable on screen Eeab08:
•
activation threshold as a %
•
deactivation threshold as a %
•
activation delay in seconds.
Heat recovery active
Activation threshold
Fig. 2.a
By selecting a 0/10V valve, modulating operation can be
enabled, setting the request corresponding to the maximum
valve opening (100.0%). Once heat recovery has been
activated, the valve will modulate proportionally to the
request.
10
HR request (%)