Sharp R-880S Betreibershandbuch PDF herunterladen (Seite 34)

Unit Description

Receiver Tank Sight Glass: The receiver tank sight glass

is used to assist in checking the amount of refrigerant in the

system.

Compressor Oil Sight Glass: The compressor oil sight

glass is used to check the relative level of compressor oil in the

compressor sump.

Unit Protection Devices

High Pressure Cutout Switch (HPCO): This normally

closed switch monitors the discharge pressure at the

compressor. It opens on high discharge pressure to shut the unit

down to prevent damage.

Suction Pressure Regulator (SPR): This component is a

mechanical control device used to limit the suction pressure to

the compressor. The valve controls suction pressure based on

the actual system pressure. (Scroll compressor units: The SPR

is not used if the unit is equipped with an ETV.)

Electronic Throttling Valve (ETV): (Scroll compressor

units only.) This component is an electromechanical control

device used to limit the suction pressure to the compressor. The

valve is controlled by the microprocessor controller.

Engine Oil Pressure Switch/Sensor: The engine oil

pressure switch/sensor is located on the filter head above the

bypass oil filter. Engine oil pressure should rise immediately

on starting. If engine oil pressure drops below 10 ± 2 psig (69 ±

14 kPa), the switch/sensor signals the microprocessor to stop

the engine.

Preheat Buzzer: The preheat buzzer sounds when the

CYCLE-SENTRY

system energizes the glow plugs. This

should warn anyone near the unit that the CYCLE-SENTRY

system is about to start the diesel engine.

Coolant Temperature Sensor: This sensor provides an

engine coolant temperature input to the microprocessor. If the

engine coolant temperature is too high, the controller stops the

unit and records an alarm.

Electric Motor Overload Relay (Model 50): The

overload relay protects the electric standby motor. The

overload relay opens the circuit from the contactor to the

electric motor if the motor overloads for any reason and an

alarm will occur. The relay resets when the alarm code is

cleared.

Fuses: Sizes and functions are described in the Specifications

section of this manual.

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 110 111

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