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ELECTRICAL CONNECTIONS
WARNING: always check that the electricity supply to the unit has
been disconnected before carrying out any operations.
In the specific case of electrical connections, the following must be
checked:
- Measurement of the isolation resistance on the electrical system.
- Testing of the continuity of protection conductors.
Electric circuits are connected to mains voltage of 230V; make sure
that all components correspond to this voltage.
CONNECTING CABLES
Use H05V-K or N07V-K cables with insulation 300/500 V in conduit or
raceway. All cables exterior to the fancoil must be protected in this
way.
Only use power cables with a minimum cross section of 1.5mm
Position cable lengths not protected by the conduit or raceway in such
a way as to ensure that they are not subject to stress, twisting or exter-
nal agents.
When making connections, always refer to the wiring diagrams sup-
plied with the unit and shown in this document.
To protect fan coils against short circuits, always fit the power cable
to the units with 2A 250V (IG) thermo-magnetic all-pole switches
with a minimum contact gap of 3 mm.
Each control panel controls a single fancoil.
COIL ROTATION
If coil rotation is required when making water connections, remove the
unit housing then proceed as follows:
- disconnect wires from the terminal block;
OMNIA UL PC
OPERATING ENVIRONMENT
The units are designed for installation in closed environments in conditions
of 'urban', non-marine atmosphere with non-corrosive and non-dusty
characteristics.
Under no circumstances the following concentrations of pollutants in the air, in
which the unit must operate, shall be exceeded:
SO
<0,02 ppm
2
H
S
<0,02 ppm
2
NO,NO
<1 ppm
2
NH
<6 ppm
3
N
O
<0,25 ppm
2
The unit should not be installed in locations characterized by the presence of
flammable gases or acidic or alkaline substances.
Otherwise the coils and the internal components of the equipment could suffer
serious and irreparable damage from corrosi
- remove the probe from the coil;
- remove the screws securing the drip tray, then lift it out;
- remove the screws securing the coil, then lift it out;
- remove the push-outs on the right side;
- rotate the coil, then secure it in place with the screws previously
removed;
- refit the drip tray then secure it with the screws; fit the plastic plugs
(supplied) in the holes left vacant by the water line connections.
All trays are prearranged for condensate drainage on either side.
N.B.: Before connecting up the condensate drain, use a tool to open
the diaphragm in the tray (where fitted) on the water connection
side. Seal the unused drain outlet using the plug provided.
Remove the electrical connections from the right hand side. Remove
2
the push-out and move the cable sheath from the right to the left.
- Move the motor cable to the left hand side, passing it through the
protective sheath.
- Move the terminal board and the earthing pin to the left hand side.
- Restore the motor cable electrical connections.
- Insert the battery probe.
- Remove the switch cards from the right hand element.
- Disconnect the microswitch.
- Remove the reinforcing stay.
- Pass the wire for the microswitch through the opening on the oppo-
site side.
- Secure the reinforcing stay.
- Fit the thermostat card on the left hand element and fit the knobs.
- Restore the control panel electrical connections.
WARNINGS FOR THE QUALITY OF THE WATER
CIRCULATING IN THE COILS
It is recommended to perform an analysis of the water circulating in the coil
focusing on the research of the possible presence of bacteria (detection of
iron bacteria and micro-organisms that can produce H2S or chemically reduce
sulphates) and on the chemical composition of the water, to prevent corrosion
and fouling inside the tubes.
The water circuit must be supplied and replenished with treated water that
does not exceed the threshold levels indicated below.
Total hardness in mmol/l
-
Chlorides [CL
]
2-
Sulphates [SO
]
4
-
Nitrates [NO
]
3
Dissolved iron
Dissolved oxygen
Carbon dioxide [CO
]
2
Resistivity
pH
N
L
l < mmoll/l < 1,5
< 10 mg/litre
< 30 mg/litre
= 0 mg/litre
< 0,5 mg/litre
4 < [O
] < 9 mg/litre
2
< 30 mg/litre
20 Ohm∙m < Resistivity< 50 Ohm∙m
6,9 < pH < 8
IULPCLJ 1810 - 6976408_05
15
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