Electrical Connections; Instructions For Start-Up; Configuration - Hitecsa EWMIM 117 Mode D'emploi

The multipliers refer to the following conditions: condenser inlet air
temperature 35°C; chilled water temperature 7°C; temperature
differential at evaporator 5°C. For different functioning conditions, the
same coefficients can be used as their variations are negligible.
Table "H"

Glycol in weight 10 %
Freezing
-5
temperature °C
fc QF 0,991
fc P 0,996
fc ∆pw
1,053
fc G 1,008
fc QF = Cooling capacity correction factor.
fc P = Correction factor for the absorbed electrical current.
fc ∆pw = Correction factor of the pressure drops in the evaporator.
fc G = Correction factor of the glycol water flow to the evaporator.
II.7

ELECTRICAL CONNECTIONS

DANGER!
Always install a general automatic switch in a
protected area near the machine, which has a
characteristic delayed curve, sufficient capacity and
breaking power. There must be a minimum distance
of 3 mm between the contacts. Earth connection is
compulsory by law to ensure user safety while the
machine is in use.
DANGER!
The electrical connection of the unit must be
carried out by qualified personnel, in compliance
with the regulations applicable in the country where
the unit is installed. Non-conforming electrical
connections releases HITECSA from liability
concerning damage to objects and persons. In
making the electrical connections to the board,
cables must be routed so that they do not touch the
hot parts of the machine (compressor, flow pipe
and liquid line). Protect the wires from any burrs.
IMPORTANT!
For the electrical connections of the unit and
accessories, refer to the relative wiring diagram.
The safety door interlock automatically prevents electric power being
fed to the unit if the cover panel over the electrical panel is opened.
After opening the front panel of the unit, feed the power supply cables
through the cable clamps in the external panelling and then through the
ducts at the base of the electric board.
The electrical power supplied by the single-phase or three-phase line,
must be taken to the main isolator switch. The power supply cable must
be flexible with a polychloroprene sheath not lighter than H05RN-F: for
the section, refer to the following table or wiring diagram.
Cable section
Line Section
PE section
Sectioncontrolsand remote controls
The earth conductor must be longer than the other conductors in order
to ensure that if the cable fastening device should become loose, it will
be the last to be stretched.
II.7.1.1 Remote management through connections
prepared by the installer
The connections between board and switch or remote light must be
made with the screened cable consisting of 2 twisted 0.5 mm² wires and
the screen. The shield must be connected to the earth screw on the
panel (on one side only). The maximum distance allowed is 30 m.
SCR - Remote ON/OFF control selector.
SEI - Summer/winter selector.
LBG - General lockout light.
15 % 20 % 25 % 30 %
-7 -10 -13
0,987 0,982 0,978 0,974
0,995 0,993 0,991 0,989
1,105 1,184 1,237 1,316
1,028 1,051 1,074 1,100
117 124
mm² 6 10
mm² 6 10
mm² 1,5 1,5
Remote ON/OFF enabling (SCR)
Remove the 10.02-DIC2 terminal bridge on the electronic board and
connect the wires coming from the remote control ON/OFF selector
-16
(selector to be installed by the installer).
ATTENTION
 Remote summer/winter enabling on EWMIM
Connect the wires coming from the remote summer/winter selector to
the 10.01-DIC2 terminal on the electronic board.
At this point, modify the "Enable cooling/heating digital input"
parameter from n to y.
ATTENTION
 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

128
10
10
II.8.1

CONFIGURATION

1,5
Safety component calibration settings EWMIM 117÷128
Pressure switch
high pressure
Pressure transducer
water differential
33
SECTION II: INSTALLATION AND MAINTENANCE
IMPORTANT!
When the unit is switched OFF using the remote
control selector, the letters Off by SCR appear on
the on board control panel display.
Open contact:
Closed contact:
Open contact:
Closed contact:
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.
Intervention
42 Bar 33 Bar - Manual
3,3 Bar – Automatic
2 Bar
80 mbar 105 mbar - Automatic
Unit OFF
Unit ON
Heating cycle:
Cooling cycle:
Reset