Carrier Aquaforce 30XAS Series, Installation, Operation And Maintenance Instructions

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9 - MAJOR SYSTEM COMPONENTS AND OPERATION DATA
9.2.2 - Oil separator
In these units, the oil separator is a pressure vessel that is mounted under the outside vertical condenser coils. Dis-charge gas at the
compressor outlet is directed towards the bottom of the oil separator ring and most of the oil separates from the gas by strong
deceleration and by gravity. The gas then flows through a wire mesh screen where the remaining oil is separated by coalescence and
flows to the bottom of the ring. The gas is now free from oil and leaves the ring at the top towards the condenser.
9.2.3 - Economiser function
The economiser function includes a liquid line valve, a filter drier, two EXVs, a plate heat exchanger as well as protection devices (fuse
or valve).
At the condenser outlet a part of the liquid is expanded via the secondary EXV in one of the heat exchanger circuits and then returns
as gas at the compressor economiser. This expansion permits increase of the liquid sub-cooling of the rest of the flow that penetrates
the evaporator via the prin-cipal EXV. This permits increasing the cooling capacity of the system as well as its efficiency.
9.3 - Control and safety
9.3.1 - High-pressure safety switches
30XAS units are equipped with high-pressure safety switches.
The high-pressure switch with manual reset, called PZH (former DBK), is backed up by a high-pressure switch that requires resetting
with a tool. The high-pressure switch that requires resetting with a tool is called PZHH (former SDBK). If a PZHH cuts out, the
corresponding PZH in the same compressor is faulty and must be replaced. The PZHH must be reset with a blunt tool with a diameter
of less than 6 mm. Insert this tool into the opening on the pressure switch and push the reset button in this location.
These pressure switches are located at the discharge of each compressor.
9.3.2 - Relief valves
30XAS units are equipped with dual relief valves on the high and low pressure side as standard, with a three-way valve to facilitate
their replacement.
9.4 - Condensers
The 30XAS coils are micro-channel condensers made entirely of aluminium. Optional coils with internally grooved copper tubes with
aluminium fins are also available (options 254 and 255).
9.5 - Fans
The fans are axial Flying Bird fans equipped with rotating shroud and made of composite recyclable material. Each motor is fixed with
transverse supports. The motors are three-phase, with permanently lubricated bearings and insulation class F.
According to the Regulation No. 327/2011 implementing Directive 2009/125/EC with regard to ecodesign requirements for fans driven
by motors with an electric input power between 125 W and 500 kW.
Product 30XAS 30XAS
Option Standard Option 119
Global fan efficiency % 35,5 39,3
Measurement category A A
Efficiency category static static
Energy efficiency target N(2015) N(2015) 40 N(2015) 40
Efficiency level at the optimal energy efficiency point 42,4 43,9
Variable frequency drive Optional Optional
Year of manufacture See label on unit See label on unit
Fan manufacturer Simonin Simonin
Motor manufacturer Leroy Somer Leroy Somer
Fan reference 00PSG000000100A 00PSG000000100A
Motor reference 00PPG000558500A 00PPG000558400A
Nominal motor capacity kW 0,83 1,85
Flow rate m
3
/s 3,12 4,28
Pressure at optimum energy efficiency Pa 95 170
Speed rpm 712 954
Specific ratio 1,002 1,002
Product disassembly, recycling or disposal at end of life See service manual See service manual
Information about minimising environmental impact See service manual See service manual