5
Technical Information
Service Manual
The use of OFDN
is important and
the HC gas de-
tector is indeed a
personnel pro-
tection device
(PPE)!
Use of portable measuring devices such as pressure gauges, thermometers and multi-
meters for measuring Volt/Amp/Ohm in the context of indirect methods for leakage
checking and interpretation of the measured parameters. It is very important to make
use of an electronic gas detection device. Take care that the electronic gas detector
is designed and certificated for the use with flammable refrigerants. Additionally, the
electronic HC gas detector must be part of the Personnel Protective Equipment (PPE)
of the technician because if this device is operational in the work area it will warn by
detection and signalling if HC refrigerant is in the atmosphere.
Usage of scales to weigh refrigerant. Knowledge of requirements and procedures for handling, storage and transportation especially
$ #! $ >$ ! $
The basic functioning of a compressor (including capacity control and lubricating system) and risks of refrigerant leakage to its
operation. Installing a compressor properly, including control and safety equipment. Adjusting the safety and control switches.
Checking the oil return system. Start up and shut down a compressor and checking the good working conditions
of the compressor, including by making measurements during operation of compressor.
The basic functioning of a condenser. Installing a condenser properly, including control and safety
equipment. Adjusting the safety and control switches. Checking the hot-gas and liquid lines in
correct positions. Start up and shut down a condenser and check the good working conditions,
including by making measurements during operation. Checking the surface of the condenser.
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The basic functioning of an evaporator (including defrosting system). Installation of an evaporator
including control and safety equipment. Adjusting the safety and control switches. Checking the
liquid and suction pipelines in the correct position and checking the hot gas defrost pipeline.
Start up and shut down an evaporator and check the good working of the evaporator, including
by making measurements during operation. Functional checking of the reverse cycling control
X$ # # $
adjustments.
Professional brazing is another key component for safe and state of the art HC system
installation and servicing. Brazing leak free joints on metallic tubes and pipes that can be
used in refrigeration, air-conditioning or heat pump systems. Make/check pipe and component
supports and vibration elimination. Knowledge about the designing and dimensioning of the
different refrigeration system section pipes including risers. The behaviour of lubricants within the
$ ! $##X
Y# $ X $ $ #
sealed (hermetic) system.
Handling of the refrigerant during installation, maintenance, servicing or recovery or
venting
Installation, commissioning and maintenance of a compressor
Installation, commissioning and maintenance of condensers
Installation, commissioning and maintenance of evaporators
Piping
Preventive
maintenance will
improve the sys-
tem efficiency
Regular
professional
brazing
experience is an
important pre-
condition for the
work with
hydrocarbon
refrigerants!
