AERMEC WRL-H, Техническое руководство

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system return Set Point is established
in accordance with the external air
temperature. Function guaranteed if the
external air probe is present (ACCESSORY).
Electronic controller μ PC
The device is the new controller for
management of the water-cooled
reversible units; the new PGD1 8-digit
display is clearly legible, while the icons
provide immediate visibility of machine
operation.
Some accesses are protected by password
and only available to the after-sales
technical service.
The electronics also integrates a series of
protection algorithms with the purpose
of preventing any damage to the main
components of the system.
FUNCTIONALITY LIST:
1. Parameterisation of the compressor
switch-on/off times prevent switch on/
off activation at short intervals.
2. In order to prevent breakage of the
plate heat exchanger due to freezing
water, 3 antifreezes, “geothermic,
system and zones” are envisioned
which are contained within. The
microprocessor also envisions
compressor block, whenever the
temperature detected by the heat
exchanger output probe is lower than
the anti-freeze set.
3. Water flow rate alarm activated
by the differential pressure switches
installed in series.
4. Condensation control is managed via
speed modulation of the pumps with
phase cut systems or inverters, a 2-way
modulating valve and ON/OFF pumps.
5. Production of DHW through a 3-way
diverter valve or the total recovery
version.
Additional functions:
• Control of an external integration
resource dedicated to DHW.
• System control with heat
pump and boiler.
• Anti-Legionella cycle.
• Time periods for the daily /
weekly programming.
Heat regulation
Temperature regulation is based on the
return water from the system. The
configured set points refer to the
temperature of the return water. If, for
example, the set point is set at +30°C, a flow
temperature of +35°C results.
System side circulation pump
The circuit board envisions an output for
the management of the circulation pump,
always on in COOLING and HEATING mode,
switched off with a delay of 1 minute from
unit switch off (stand-by).
Source side pump
The circuit board envisions an output for
the source side pump control (see pumps
available at configurator). The source side
pump is switched on before start up of the
compressor and switched off about 30
seconds after the compressor is switched
off.
Anti-freeze alarm
The anti-freeze function is only active if
the unit is ON or in stand-by.
In order to prevent breakage of the plate
heat exchanger due to freezing of the
water it contains, the micro processor
envisions the compressor blocking if
the temperature detected by the heat
exchanger output probe results
less than +4°C.
THIS ANTI-FREEZE SET TEMPERATURE CAN
ONLY BE VARIED BY AN AUTHORISED AFTER-
SALES CENTRE AND ONLY AFTER HAVING
CHECKED THAT THERE IS ANTI-FREEZE
SOLUTION IN THE WATER SYSTEM.
The intervention of this alarm determines
compressor and block but not of the pump,
which remains active.
Domestic hot water anti-freeze
The DHW anti-freeze function is only active if
it has an integration resource dedicated to
the storage of domestic hot water.
The integration resource is activated if the
temperature of the water detected by
the sanitary probe is less than +4°C and is
switched off at +7°C.
Wizard
To facilitate commissioning the unit, a
start-up procedure has been created. This
procedure is used upon the first start-up.
Supervision system
− MODBUS
For other requirements, contact the
head office.
PGD1 GRAPHIC TERMINAL
•
backlit
• LCD
• Icons to identify the type
of operation.
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IWRLTY. 1201. 5890974_06