Hitachi YUTAKI RWM-2R1E Installation & Operation Manual page 352

MAINTENANCE
6 YUTAKI S80 - Electrical equipment
• Activation: Check for an abnormal activation of the magnetic contactor, the auxiliary relay, the PCB and others.
• Line condition: Pay attention to the working voltage, the working amperage and the working phase balance. Check for any
faulty contact that is caused by the loosened terminal connections, the oxidized contacts, the foreign matter and other items.
Check the electrical insulation resistance.
7 YUTAKI S80 - Control device and protection device
• Setting: Do not readjust the setting in the field unless the setting is maintained at a point that is different from the point listed
in the Technical Documentation.
8 YUTAKI S80 - Compressor
• Sound and vibration: Check for abnormal sounds and vibrations.
• Activation: Check that the voltage drop of the power supply line is within 15% at the start and within 2% during the operation.
9 YUTAKI S80 - Oil heater (Crankcase heater of the compressor)
• Activation: The oil heater should be activated at least twelve hours before the start-up by turning ON the main switch.
The manometer is placed at different positions according to each unit model
YUTAKI S / S COMBI
In YUTAKI S and S COMBI models, the manometer is installed factory supplied as it is shown:
YUTAKI M
For the YUTAKI M series it is highly recommended to install, field supplied, a manometer gauge attached to the water inlet pipe and
after the shut-off valve.
338 PMML0575 rev.2 - 03/2022
RWM-(4.0-10.0)NE
Manometer
RWM-(2.0-3.0)R1E
Manometer
RWD-(4.0-6.0)NW(S)E-(200/260)S(-K)
Manometer
RWD-(2.0-3.0)RW1E-220S(-K)
Manometer