AERMEC ANL 100HA, Техническое руководство по установке

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26. FUNCtIoNINg FeAtUreS
26.1. Set PoINt IN CooLINg MoDe
(Factory set) = 7°C, ∆t = 5°C.
26.2. Set PoINt IN rISCALDAMeNto
(Factory set) = 45°C, ∆t = 5°C.
if the unit power supply is restored after a tempo
-
rary interruption, the set mode will be kept in the
memory.
26.3.
COMPrESSOr STArT-UP DELAY
Two functions have been prepared to prevent com
-
pressor start-ups that are too close.
- Minimum time from last switch-off 60 seconds in
cooling mode.
- Minimum time from last switch-on 300 seconds
in heating mode
26.4. CIrCULAtIoN PUMP
The circuit board envisions an output for the mana-
gement of the circulation pumps.
The pump side utilities start immediately after the
first 30 seconds of functioning. When the water
flow rate has gone into normal working conditions,
the flow meter control functions are activated (if
envisioned).
Below find the compressor start-up procedure, by
switching the source side pump on with flow meter
check if enabled after 20 seconds.
Whenever alarms do not occur, the compressor
starts.
26.5.
AnTI-FrEEZE ALArM
The anti-freeze alarm
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is active if the machine
is off or in stand-by mode. in order to prevent the
heat exchanger from breaking due to the water
it contains freezing, envision compressor block (if
the machine is on below 3.5 °C) and ignition of the
resistance (if standby below 5 °C). if the tempera
-
ture detected by the probe positioned in outlet of
the heat exchanger and in inlet to the chiller is less
than +3.8°C.
The intervention of this alarm
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determines com-
pressor block and not pump block, which remains
active along with the switchon of the resistance if
installed.
To restore normal functions the temperature of the
outlet water. Rearm is manual.
26.6. wAter FLow rAte ALArM
The unit manages a water flow rate alarm controlled
by the differential/flow pressure switch installed in
series on the machine. This type of safety device
intervenes after the first 30 seconds of pump fun
-
ctioning, if the water flow rate is not sufficient.
The intervention of this alarm determines compres
-
sor and pump block.
AtteNtIoN
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This anti-freeze set tempera-
ture can only be varied by an
authorised after-sales centre
and only after having checked
that there is anti-freeze solu-
tion in the water system.
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Whenever this alarm
intervenes, We advise you call
the nearest after-sales service
immediately