Electrical Connection Of Rpim Units - Hitachi RCI-1.0FSN3 Service Manual

4 Electrical wiring
Test runs
C A U T I O N
• Be careful during the test runs, as some of the safety functions remain disabled: the units operate for two hours
without switching off via the thermostat. The three-minute compressor protection is not enabled during the test.
• Secure the rubber bushes to the panel using adhesive when the outdoor unit ducts are not used.
The compressor remains at a standstill during forced stoppage.
•
RPI-(8.0/10.0)FSN3E static pressure setting
RPI units have been provided by two Static Pressure levels
regulation depending on the installation requirements. High Static
Pressure and Low Static Pressure (Std. Factory Setting)
connectors are available into the Electrical Box.
Setting of Static Pressure shall be made by changing the Fan Unit
connector.
• A: connector CN24 LSP (Low Static Pressure); (factory
supplied).
• B: connector CN25 HSP (High Static Pressure).
To do so, simply replace the motor power connector identified
as CN24 (factory-connected for operation at low static pressure,
LSP) with the high-pressure connector CN25 (operation at high
static pressure, HSP).

4.1.7 Electrical connection of RPIM units

Work prior to the electrical connection
1 Turn off the power supply switches before starting work and fit the appropriate locks and safety warnings.
2 Wait 5 minutes after turning off the power supply switches.
3 Check that the fans on the indoor and outdoor units are at a standstill before starting work.
N O T E
• The electrical power for the unit must involve a specific power line, with an exclusive power control switch and
residual current breaker, installed in line with local or national safety regulations.
• Check that the electrical power line has enough capacity to supply the unit. Its length, the cable diameter and
their protection (sleeve or jacket) must be appropriate for the unit.
• For further information, always consider the current regulations in the country where the unit is to be installed.
C A U T I O N
• Risk of fire: cables must never touch the refrigerant pipes, printed circuit boards (PCB), sharp edges or elec-
trical components inside the unit to avoid damaging them.
• Loose connection terminals may lead to cable and terminal overheating. The unit may operate incorrectly,
leading to a risk of fire. Check that the cables are firmly secured to the connection terminals.
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SMGB0077 rev.0 - 01/2013