13Aermec cod. 5806715_00 12.01
NRP 0200-0750
EN
5.3. STANDARD HYDRAULIC CIRCUIT
WATER FILTERS
Equipped with steel filtering mesh, prevents the heat
exchangers both of the system side and the DHW/
heating system side from clogging.
FLOW SWITCHES
They have the task of controlling that there is water
circulation inside the heat exchangers; if this is not the
case, they block the unit.
AIR VENT VALVE
Mounted on the top of the hydraulic system; they
discharge possible air pockets.
5.3.1. COMPONENTS OF HYDRAULIC CIRCUIT IN
CONFIGURABLE VERSIONS
PUMPS
High or low static pressure.
EXPANSION VESSEL
With nitrogen pre-load membrane.
SAFETY VALVE
Equipped with a piped discharger, intervenes by
discharging the over pressure in case of anomalous
pressures.
SYSTEM STORAGE TANK
Made of steel to reduce heat loss and to eliminate
the formation of condensation, insulated by thick
polyurethane.
Supplied as per standard with 300W electric anti-
freeze resistance (as low as -20°C outside temperature
- 5°C tank water temperature) controlled by anti-freeze
probe inserted in tank.
5.4. SAFETY AND CONTROL COMPONENTS
MANUALLY RESET HIGH PRESSURE SWITCH
With fixed calibration, placed on high pressure side of
cooling circuit, inhibits functioning of compressor if
abnormal work pressure occurs.
LOW PRESSURE TRANSDUCER
Placed on the low pressure side of the cooling circuit,
it signals the work pressure to the control board
generating a pre-warning in the case of anomalous
pressures.
HIGH PRESSURE TRANSDUCER
Placed on the high pressure side of the cooling circuit,
it signals the work pressure to the control board
generating a pre-warning in the case of anomalous
pressures.
COOLING CIRCUIT SAFETY VALVES
They intervene by discharging the overpressure in the
case of anomalous pressures.
- Calibrated at 45 bar on HP branch.
- Calibrated at 30 bar on LP branch.
DCPX CONDENSATION PRESSURE CONTROLLER
This accessory allows correct functioning with external
temperatures lower than 10°C and as low as – 10°C.
It consists of an adjustment circuit board that varies
the number of fan revs according to the condensation
pressure read by the high pressure transducer, in order
to keep it sufficiently high for correct unit functioning.
It also allows correct functioning in heating mode with
external temperatures exceeding 30°C and up to 42°C.
5.5. ELECTRIC CONTROL
AND POWER BOARD
Electric board in compliance with standards EN 60204-
1/IEC 204-1, complete with:
- transformer for the control circuit,
- door lock main isolating switch,
- fuses and contactors for compressors and fans,
- terminals for REMOTE PANEL,
- spring type control circuit terminal board,
- outdoor electric board with double door and
gaskets,
- electronic controller,
- evaporator pump and recovery pump control
consent relay (only for versions without pump
units),
- all numbered cables.
DOORLOCK ISOLATING SWITCH
The electric control board can be accessed by removing
the voltage. Act on the opening lever of the control
board itself. This lever can be locked using one or more
padlocks during maintenance interventions to prevent
the machine being powered up accidentally.
CONTROL BOARD
Allows the complete control of the appliance. For a
more in-depth description please refer to the user
manual.
ATTENTION
(1) For questions of space, in
configurations with storage
tank and built-in pump/s on
the system side, no pumps
can be available on the
recovery side!
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