Ingersoll-Rand Thermo King V-520 10, Руководство оператора

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Unit Description
23
refrigerant passes through the metering orifice it expands and
evaporates, cooling the suction gas entering the compressor.
This cooling effect is transferred to the discharge gas leaving
the compressor from the adjacent cavity in the compressor
head. When the discharge gas is cooled to 200 ± 5 F (93 ± 3 C),
the liquid injection switch opens, the liquid injection solenoid
closes and refrigerant no longer flows through the liquid
injection system.
Evaporator Drain Tube Heaters
Evaporator heaters are used in MAX units to avoid drain tube
blockage because of ice accumulation inside the evaporator.
One heater is located inside each drain tube. These resistive
wire heaters melt the ice while the unit is in DEFROST mode.
Electric Standby Operation
During electric standby operation, the thermostat controls the
operation of the unit by energizing and de-energizing the
power relay and the electric relays. The thermostat places the
unit in cool by energizing the motor contactor and the electric
relays.
The thermostat places the unit in null by de-energizing all the
relays and contactors. The thermostat places the unit in heat by
energizing the heat contactor.
When the power relay and the electric relays are energized,
they close contacts that energize the fan relay, the motor
contactor, and the electric standby compressor clutch.
Oil Separator
An oil separator is a standard feature. The oil separator
separates compressor oil from the refrigerant and returns the
oil to the compressor through the suction line. The oil separator
helps provide positive oil return at high compressor speeds and
low operating temperatures. This feature enhances compressor
lubrication and extends compressor life.
Unit Description
23
refrigerant passes through the metering orifice it expands and
evaporates, cooling the suction gas entering the compressor.
This cooling effect is transferred to the discharge gas leaving
the compressor from the adjacent cavity in the compressor
head. When the discharge gas is cooled to 200 ± 5 F (93 ± 3 C),
the liquid injection switch opens, the liquid injection solenoid
closes and refrigerant no longer flows through the liquid
injection system.
Evaporator Drain Tube Heaters
Evaporator heaters are used in MAX units to avoid drain tube
blockage because of ice accumulation inside the evaporator.
One heater is located inside each drain tube. These resistive
wire heaters melt the ice while the unit is in DEFROST mode.
Electric Standby Operation
During electric standby operation, the thermostat controls the
operation of the unit by energizing and de-energizing the
power relay and the electric relays. The thermostat places the
unit in cool by energizing the motor contactor and the electric
relays.
The thermostat places the unit in null by de-energizing all the
relays and contactors. The thermostat places the unit in heat by
energizing the heat contactor.
When the power relay and the electric relays are energized,
they close contacts that energize the fan relay, the motor
contactor, and the electric standby compressor clutch.
Oil Separator
An oil separator is a standard feature. The oil separator
separates compressor oil from the refrigerant and returns the
oil to the compressor through the suction line. The oil separator
helps provide positive oil return at high compressor speeds and
low operating temperatures. This feature enhances compressor
lubrication and extends compressor life.