Hitecsa ADVANCE EQS Mode D'emploi page 72

Offset of the antifreeze threshold when the water temperature is equivalent
1
to the antifreeze threshold
Offset of the antifreeze threshold when the water temperature is equivalent
2
to the antifreeze threshold + 10°C
Differential to calculate the alarm bypass
3
Alarm bypass applied to the threshold
4
Alarm bypass applied to the threshold - differential
5
The following graph indicates the trend of the low pressure alarm (LP), LOP alarm
and LP and LOP prevention alarm. Note on the Cartesian plane the points set in the
example window.
Alarm threshold and LOP prevention [°C] - activates the
ThrLOPalarmSlow
threshold delay
Alarm threshold and LOP prevention [°C] - activates the
ThrLOPalarmFast
minimum delay
Alarm tripping area and LOP prevention
AreaLOPalarm
Antifreeze threshold [°C]
ThrAntifreeze
Alarm LOP - offset (AF)
LOPalarmOffsetAF
Alarm LOP - offset (AF+10)
LOPalarmOffsetAF10
Alarm LOP - Differential
LOPalarmDiff
Water temperature [°C]
WaterTemp
Evaporation saturation temperature [°C]
EvapSatTemp
III.1.9.4 Antifreeze alarm / Electric heater
For each heat exchanger it is possible to set the outlet temperature threshold
under which the alarm is triggered. The electrical resistance that prevents icing of
the heat exchanger switches on, with compressors off, before reaching the alarm
threshold, based on the offset. It is possible to choose between
if jointly with the resistance, the pump also needs to be turned on, if off, or not.
Antifreeze alarm threshold
1
Rearm differential
2
Anti-freeze threshold when cold set-point 2 is active (only with DSP option)
3
Number of times in an hour for which the alarm reset is automatic. After this
4
number, the reset becomes manual.
Number of times in a day for which the alarm reset is automatic. After this
5
number, the reset becomes manual.
Deviation from the antifreeze threshold in use for the activation of the
1
resistance
Switch-off differential
2
Enables pump start-up forcing when resistance is active
3
USM_CONTROL EQS_2335a21275_208549_210701_ES-EN-FR-DE-IT
With the parameters set in the example screens, the electrical resistance switches
on at 4°C together with the circulation pump, after that the anti-freeze alarm is
triggered at 3°C.
1
2
3
4
5
The same settings are possible for the disposal heat exchanger (water-water
units) and for the recovery heat exchanger (EXP versions and versions with
RC100) and for the desuperheater heat exchanger (versions with DS).
The oil level sensor is triggered to signal the oil level in the circuit is too low. It is
possible to set the alarm delay to be used when the compressor starts up and at
full speed.
To be able to use the machine complying with the compressors' operating range,
the water supplied to the unit must not be at an exceedingly high temperature (in
cooling mode) or too low (in heating mode). If the water does not comply with
these limits, the unit might go into alarm mode (typically low evaporation pressure
or high/low condensation pressure). If these alarms occur while the outlet water
does not comply with the set limits, a warning is displayed, and the "water
temperature off operating limits" alarm is added to the alarms log.
1
2
3
4
5
In windows Ji16 and Ji17 it is possible to set the parameters concerning activation
of the various steps of the integrative recovery resistances. The heaters are
turned on if the outdoor air drops below the set threshold (even when unit is off) or
if with unit on the recovery inlet temperature drops below its threshold.
1
2
3
The steps are activated based on the recovery water temperature, as indicated in
the settings in window Ji17.
94
III.1.9.5 Low oil level alarm
III.1.9.6 Cold/hot water alarm
Water temperature of the primary heat exchanger / disposer / recovery
1
above which a blocking alarm in cooling also causes hot water alarm.
Water temperature of the primary heat exchanger / regenerator / recovery
2
below which a blocking alarm in heating also causes cold water alarm.
Water temperature of the desuperheater heat exchanger below which a
3
blocking alarm also causes cold water alarm.
Number of times in an hour for which the alarm reset is automatic. After this
4
number, the reset becomes manual.
III.1.9.7 Recovery integrative resistances
CONTROL EQS
1
2
3
4