Lync AEGIS Controller
1: INTRODUCTION
L-OMM-013_A
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The high pressure set point is not fixed, but instead is calculated based on inlet water
temperature, outlet water temperature, and evaporation temperature. The pressure is managed
by the thermostatic valve.
The setpoint value is limited between a minimum and a maximum fixed value. Within these limit
values is also active a compensation curve based on the evaporator temperature that keeps the
compressor within the required operating envelope.
1.9. Anti-Legionella
Legionellosis is an infection caused by aerobic bacteria of the genus Legionella that mainly
affects the respiratory system.
The proliferation of Legionella depends on the water temperature. As can be seen from the chart
below, the disinfection is feasible through thermal shock.
Figure 1-4: Legionella Growth Chart
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The anti-Legionella function raises the water storage tanks to a high temperature and
subsequently circulates to ensure complete disinfection of the system.
The anti-Legionella
function, if enabled via “ALG01 Enable anti-Legionella” is activated based
on a
time band (if “ALG02 Enable scheduler” is set) or manually via web interface / BMS
(“ALG16 Manual start” and ”ALG17 Manual stop”).
The conditions necessary to make the anti-Legionella function activable are:
•
Aegis unit active (Unit ON)
•
anti-Legionella function enabled (parameter ALG01 set to ON)
•
no BTL probe alarm
•
no BT1 probe alarm
•
absence of expansion # 1 offline alarm
•
absence of expansion # 2 offline alarm
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Freije, Matthew R.
How to Make Plumbing Systems Less Conducive to Legionella and Other Bacteria
.
HC Information Resources, 1998.
