Introduction - Carel pRack pR300T Manual Del Usuario

F
FHW
T T
T T
HR1I
3W
HRI
T
T
HR1
disch
Type Name
AI THR[1-2]I
AI THR[1-2]O
AI TGC
AI TGC by-passed
AI PGC
DI FHW
DO/AO 3WHR[1-2]
DO/AO PHR[1-2]
DO/AO 3WGC
DI ---
In a CO2 Booster system, the heat recovery function (or heat reclaim, hereinafter HR) exploits the heat
normally dissipated by the gas cooler for domestic hot water production or space heating.
pRack pR300T can manage two heat recovery functions at the same time. Each heat recovery function is
activated and controlled based on the percentage of heat demand, which can be calculated based on:
•
a digital input
•
a temperature probe
•
an external analogue signal
An additional digital input can be used to preliminarily enable the function.
Once activated, heat recovery can, if required, act on the HPV valve set point and the eff ective gas cooler set
point, either simultaneously (both at the same time) or sequentially, based on thresholds (fi rst the HPV and
then the gas cooler, when exceeding a certain heat demand threshold).
1.

INTRODUCTION

F
T T
T
HR1O HR2I
3W
HR2
T
T
HR2
disch HR2
FHW
T
HR2O
3W
GC
T
T
GAS cooler
ING GC
Fig. 1.a
Description
Water inlet temperature
Water outlet temperature
Outlet temperature to the gas cooler
Temperature after the gas cooler bypass
Pressure in the gas cooler
Flow sensor
3-way valve for heat recovery
Pump control
3-way valve for gas cooler bypass
Preliminary function enabling
5
ENG
T T P
GC GC by passed GC
T T P
+030220595 - 1.0 - 27.01.2016
HPV
ExV
Tab. 1.a