Instructions For Start-Up; Configuration; Unit Start-Up - Hitecsa EWMIG 236 Manuel D'installation, D'utilisation Et D'entretien

Remote ON/OFF enabling (SCR)
IMPORTANT!
When the unit is switched OFF using the remote
control selector, the letters Scr appear on the on
board control panel display.
Remove the 10.02-GND terminal bridge on the terminal board and
connect the wires coming from the remote control ON/OFF selector
(selector to be installed by the installer).
Open contact:
ATTENTION
Closed contact:
Remote summer/winter enabling
Connect the wires coming from the remote summer/winter selector to
the 10.01-GND terminal.
At this point, modify the SUr parameter from n to y.
Open contact:
ATTENTION
Closed contact:
LBG remote control
To remotely control the two signals, connect the two lamps according to
the instructions provided in the wiring diagram supplied with the
machine.
II.7.1.2 Remote management using accessories
supplied loose
It is possible to remote control the entire machine by linking a second
keyboard to the one built into the machine (KTR accessory). To select
the remote control system, consult paragraph II.3. Use and installation
of the remote control systems are described in the Instruction Sheets
provided with the same.
II.8

INSTRUCTIONS FOR START-UP

IMPORTANT!
Machine commissioning or the first start up (where
provided for) must be carried out by skilled
personnel from workshops authorised by
HITECSA, qualified to work on this type of
products.
IMPORTANT!
The use and maintenance manuals for the pumps,
fans and safety valves are attached to this manual
and should be read throughout.
DANGER!
Before starting up, make sure that the installation
and electrical connections conform with the
instructions in the wiring diagram. Also make sure
that there are no unauthorised persons in the
vicinity of the machine during the above operations.
DANGER!
The units are equipped with safety valves located
inside the technical compartment. When they cut in,
they cause a loud noise and violent refrigerant and
oil leaks. Do not approach the safety valve tripping
pressure value.
II.8.1

CONFIGURATION

Safety component calibration settings EWMIG
Pressure switch
high pressure
Pressure transducer
water differential
Configuration parameters
Summer working temperature set point
Winter working temperature set point (EWMIG)
Work temperature differential
Antifreeze temperature set point
Antifreeze temperature differential
Press. exclusion time of low pressure at start-up
Press. exclusion time water differential upon start-up
Circulation pump switch off time delay
Minimum time between 2 consecutive compressor start-ups
The units are tested in the factory, where they are also calibrated and
the default parameter settings are put in. These guarantee that the
appliances run correctly in rated working conditions. The machine
configuration is carried out in the factory and should never be altered.
Unit OFF
Unit ON
Heating cycle:
Cooling cycle:
Intervention Reset
42 Bar 33 Bar - Manual
3,3 Bar – Automatic
2 Bar
80 mbar 105 mbar - Automatic
Standard settings
II.8.1.1 KEAP accessory - remote controlled
outdoor air probe
For correct shifting temperature adjustment of water coming out of the
heat pump, it is important that the air temperature has a significant
value and is not influenced by the incorrect position of the sensor/unit."
The unit is equipped with an outdoor air temperature sensor located
next to the fin-packed heat exchanger.
If the unit is installed facing the sun and outdoor air temperature reading
is therefore altered, it is possible to connect the KEAP remote control
outdoor air probe accessory. This requires the following operation:
- purchase the KEAP accessory
- disconnect the outdoor air probe from the board and connect the
remote control sensor to the same clamps, following the relative
instructions on the instruction sheet.
Maximum length of the probe cable 30m; type of cable FROH2R
300/500V 2x0.75
II.8.2

UNIT START-UP

Before starting the unit, perform the following checks.
○ The electrical supply must comply with the specifications on the data
plate and/or the wiring diagram and it must fall within the following limits:
variation of the power supply frequency. ±2 Hz;
variation of the power supply voltage: ±10% of the nominal voltage;
imbalance between the supply phases: <2%.
○ the electrical supply system must be able to supply adequate current
and be suitably sized to handle the load;
○ open the electric panel and make sure the terminals of the power
supply and of the contactors are tight (they may have come loose
during transport, which could lead to malfunctions);
○ check that flow and return pipes of the hydraulic system are
connected in accordance with the arrows next to the machine water
inlet/outlet;
○ make sure that the air side heat exchanger is well ventilated and
clean;
Electrical connections must be made in compliance with the local
installation standards in force in the place where the unit is installed,
and with the instructions in the wiring diagram provided with the unit.
Refer to the wiring diagram to size the supply cables.
Starting the unit
7 °C
45 °C
This manual provides recommendations and general information
2 °C
required for starting the unit. The electronic control manual also
2,5 °C
describes all the operations required for running the unit.
2 °C
120"
Bleed the system, before starting the compressors. The
15"
units are equipped with manual bleed valves inside the unit.
15" To facilitate the bleed, the pump can be activated manually from
360" control panel (see the control manual from the assistance menu).
48
SECTION II: INSTALLATION AND MAINTENANCE
IMPORTANT!
The outdoor air temperature sensor is very
important for unit control in normal operation and
to manage the defrost cycles. Therefore, you
should pay particular attention if installing the
KEAP.