RHOSS Compact-Y SM TCAEY 122 P0 Instrucciones De Uso página 34

II.7.1.1 Remote management through connection
preparation 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
screening. The screening must be connected to the earth screw on the
panel (on one side only). The maximum permitted distance is 30 m.
SCR - Remote ON/OFF control selector.
SEI - Summer/winter selector.
LBG - General lockout light.
 Remote ON/OFF enablement (SCR)
IMPORTANT!
When the unit is switched OFF by means of the
remote control selector, the messaqe Scr. will
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).
Open contact:
ATTENTION
Closed contact:
 Remote summer/winter enablement on THAEY
Connect the wires coming from the remote summer/winter selector on
the ID7 terminal present on the electronic board.
At this point, change parameter SUr, from n to y.
Open contact:
ATTENTION
Closed contact:
 LBG – LCF1 – LCF2 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 separately
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. The use and
installation of the remote control systems are described in the
Instruction Sheets provided with the same.
II.8 START-UP INSTRUCTIONS
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 product.
IMPORTANT!
The use and maintenance manuals for the pumps,
fans and safety valves are enclosed with 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
positioned 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 cut-in pressure.
the unit is OFF.
the unit is ON.
heating cycle.
cooling cycle.
34
II.8.1 CONFIGURATION
Safety component calibration settings
Pressure switch
high pressure
low pressure
water differential
DANGER!
The safety valve is calibrated to 41.7 bar. It could
cut in if the calibration valve is reached during the
refrigerant charging operations, causing a burst
that could cause scalding.
Configuration parameters
Summer working temperature set point
Winter working temperature set point (THAEY)
Working temperature differential
Antifreeze temperature set point
Antifreeze temperature differential
Water differential pressure switch time upon start-up
Water differential pressure switch exclusion time upon start-
up
Circulation pump switch off time delay
Minimum time between two 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.
IMPORTANT!
If a unit is used for the production of chilled water,
check the adjustment of the thermostatic valve.
II.8.2 UNIT START-UP
Before starting the unit, perform the following checks:
○ The electricity power 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 power 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 the water system inlet and outlet pipes are connected in
accordance with the arrows next to the machine water inlet/outlet;
○ check that the air-side heat exchanger is clean and that the airways
are clear.
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.
For the sizing of the supply cables, refer to what is set out in the wiring
diagram.
The machine can be started by pressing the ON/OFF key on the
keyboard built into the machine. Using the MODE key, select an
operating mode (chiller or heat-pump). Any problems the system
encounters will be immediately shown on the display on the control
keyboard. At start-up, the first device to start in the system is the pump,
which has priority over the rest of the system. During this phase, the
minimum water flow differential pressure switch and the low pressure
switch (if present) are ignored for a preset time, in order to avoid
variations caused by air bubbles or turbulence in the
water circuit or by pressure fluctuations in the refrigerant circuit. Once
these time-delays are over, final enablement is given to the machine,
followed after another safety time-lag by the compressor.
Compact-Y SM
Cut-in Reset
40.2 bar 28.1 Bar - Manual
2 Bar 3.3 Bar – Automatic
80 mbar 105 mbar - Automatic
Standard setting
7°C
45°C
2°C
2,5°C
2°C
120"
15"
15"
360"