CIAT DYNACIAT LG 080, Инструкция по эксплуатации

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13.6 - High-pressure switch and high-
pressure sensor
Units are equipped with an automatically reset safety pressure
switch on the liquid line. Refer to the controls manual for the
alarm acknowledgements.
It is strictly forbidden to modify the unit refrigerant circuit. The
pressure switch is specific to the units - do not interchange it with
other units. The pressure switch tap does not include a Schrader
valve.
High-pressure switch
High-pressure sensor
The high-pressure sensor is however equipped with a Schrader
valve. It is specific to these units and must not be replaced with
one from other units.
LGN units are equipped with an automatically reset safety
pressure switch on the discharge line. The pressure switch is
specific to LGN units. Do not interchange it with other units,
including LG units.
13.7 - High and low-pressure side relief
valves
The units are equipped with safety valves in accordance with
the European directive 2014/68/UE. These safety valves are
calibrated and sized in accordance with the original high and
low-pressure side equipment.
Units include high and low-pressure side safety valves.
LGN units are only equipped with low pressure side valves. The
installer must determine which accessories (relief valves, fuses
etc.) are required so that the completed high-pressure circuit
complies with the applicable regulations and standards.
13.8 - Moisture indicator
Located in the liquid line, permits control of the unit charge, as
well as the presence of moisture in the circuit. Bubbles in the
sight glass indicate an insufficient charge or the presence of
non-condensibles.
For LGN units, if the patch in the sight glass is yellow upon
delivery, this indicates that it is not a nonconformity. However,
after the unit is evacuated and after a certain operating time,
check that colour of the patch in the sight glass is no longer
yellow (indicator of the presence of humidity)
13.9 - Filter drier in the refrigerant circuit
The filter keeps the circuit clean and moisture-free. The moisture
indicator shows when it is necessary to change the filter
cartridges. A temperature difference between the filter drier inlet
and outlet indicates a contamination of the cartridges.
LGN units are delivered as standard supply with a dryer for
brazing on the liquid line. It must be brazed as close as possible
to the unit, upstream of the solenoid valve and as soon as
possible after the circuit has been exposed to the atmosphere
while connecting the air-cooled condenser
13.10 - Evaporator and condenser pump
suction filter
Filter positions in the unit
All pumps are protected by a suction filter. With the safety
hydraulic component option, we have additional conical filter put
on the inlet pipe (See picture above). This is easily removable
to recover solid particles. It protects the pump and the plate heat
exchanger against solid particles with a size exceeding 1,2 mm.
Before the unit start-up it is important to turn the evaporator and
condenser pump to decontaminate the water loops of any solid
pollution.
A specific pump start-up function in the Quick Test menu is
available for this task.
13.11 - External temperature sensor
The outside air temperature sensor is used to optimise setpoint
control with outside air temperature variation measurement.
The position of the temperature sensor must be chosen with
great care and must be representative of the outside temperature
(limit any other source that could have a negative influence on
the control: Gusts of wind, other heat sources such as sun
radiation and hot air recycling).
The outside air temperature is also provided with drycooler
control and drycooler free cooling management options.
LGN units require outside air temperature information. This
information is essential in order for the entire system to run
smoothly (EXV, fans, condensation temperature, setpoint). For
units without remote condenser control (standard), the sensor
(25 m) is provided with the LGN electrics box and must be
installed near the air-cooled condenser.
For units with remote condenser control (option 154), the sensor
is provided with the option and must be installed near the air-
cooled condenser.
13 - MAJOR SYSTEM COMPONENTS AND OPERATION DATA
EN-53 Dynaciat LG/LGN