Hitachi RAS-8-FSNM - MAIN SAFETY DEVICES; Compressor Protection; AC Fan Motor Protection

ENGLISH
12 MAIN SAFETY DEVICES
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Compressor Protection
The compressor is protected by the following devices and their combinations.
• High Pressure Switch: This switch cuts out the operation of the compressor when the discharge pressure exceeds the setting.
Oil Heater: This band type heater protects against oil foaming during cold starting, as it is energized while the compressor is
stopped.
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AC Fan Motor Protection
Internal thermostat: Embedded in the fan motor winding, this internal thermostat cuts out the operation of the fan motor when the fan
motor winding temperature exceeds the setting.
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Safety and control device setting for outdoor units
Model RAS-8FSNM RAS-10FSNM RAS-12FSNM
For compressor Automatic Reset, Non-Adjustable
Pressure switch (each one for each compressor)
High Cut-out MPa 4.15
-0.05
4.15
-0.05
4.15
-0.05
-0.15 -0.15 -0.15
Cut-in MPa 3.20±0.15 3.20±0.15 3.20 ±0.15
Fuse capacity
A 40 40 40 3N~ 400V 50Hz
CCP timer Non-Adjustable
Setting time min. 3 3 3
For condenser AC fan motor Automatic Reset, Non-Adjustable
Internal thermostat (each one for each motor)
DC Cut-out ºC 125±5 125±5 125±5
AC Cut-out ºC 150±5 150±5 150±5
Cut-in ºC 150±5 150±5 150±5
For control circuit
Fuse capacity PCB1,5 A 5 5 5
Fuse capacity PCB3 A 10 10 10
CCPTimer:Enforced3minutesoperationandstoppage.
MAIN SAFETY DEVICES
PMML0390B REV.0 - 11/2015 - P5416649
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