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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 RHOSS S.p.A. 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). Use the specific slots for anchoring
clamps on the panel of the compressor
compartment and protect the cables from burrs.
IMPORTANT!
For the electrical connections of the unit and
accessories, refer to the supplied 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 having removed the lower panel on the right side of the unit, feed
the power cables through the appropriate cable glands in the right
external panelling and then through the cable glands at the base of the
electric panel, making sure to avoid touching hot parts inside the
machine.
Electric connections must be performed in compliance with standards in
force and with the wiring diagrams supplied with the unit.
The electrical power supplied by the three-phase line plus neutral, 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.
Model
mm²
Section L1-L2-L3
mm²
PE section
The earth conductor must be longer than the other conductors in order
to ensure that if the cable fastening device should become slack, it will
be the last to be stretched.
IMPORTANT!
If a pump is installed in the units without storage, it
must be managed by a meter connected to the J6
terminals on the electronic board inside the
electrical panel.
The maximum applicable load is 230V/5A (AC1).
114
117
121
126
128
4
4
6
6
6
4
4
6
6
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SECTION II : INSTALLATION AND MAINTENANCE
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 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.
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 ID8 terminal bridge on the electronic board and connect
the wires coming from the remote control ON/OFF selector (selector to
be installed by the installer).
ATTENTION
Remote summer/winter enabling on THCEY
Connect the wires coming from the remote summer/winter selector to
the ID7 terminal on the electronic board.
At this point, modify the SUr parameter which must go from n to y (see
par. I.9).
ATTENTION
LBG remote control
To remotely control the signal, connect the light according to the
instructions provided in the wiring diagram supplied with the machine
(max. 24 Vac).
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.2. 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 RHOSS
S.p.A., qualified to work on this type of products.
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.
IMPORTANT!
The safety valve, fan and pump use and
maintenance manual come attached to the present
manual and must be read in its entirety.
DANGER!
Do not bring the safety valves close to their
calibration values while loading gas as their
triggering causes a loud noise and violent gas and
oil discharge. The bleed valve drain is not
channelled!
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Open contact:
Unit OFF
Closed contact:
Unit ON
Open contact:
Heating cycle:
Closed contact:
Cooling cycle:
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