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Moreover, Modbus providing communication with building automation system is procured as standard.
Along with that, additional modules could be added by the use of other various building automation systems
(Bacnet MS-TP, Bacnet IP, and Lonworks).
2.2. Compressors
In URTP devices, hermetic scroll-type compressors were used.
There are lubricant pans, pan heaters and vibration absorber wedges as standard at compressors for all
models.
2.3. Lubricants
So that compressors could operate without any problems, lubricants defined at compressors’ marks should
be used. Compressors with other brands could be used according to models for these units.
They have lubricant indicators at which the amount of lubricant could be seen. Pay attention to that the
amount of lubricant should absolutely be at the middle level of the indicator.
While low amount causes that compressor works dry and gets heated up, high amount causes operational
problems by leaking into the system. Moreover, lubricant in the compressor may leak to the system when
the device leans sideward during transports, don’t let the device to lean sideward more than 15 degrees
throughout this procedure.
The device won’t need any addition or reduction of lubricant except for the case of being damage.
2.4. Condenser Coil
In URTP devices, temperature changing gas heat exchangers are used for copper tubes, aluminum fins.
These heat exchangers function only as condenser in models working as coolers, while they function as
condenser in summer, evaporator in winter in models with heat-pumps. In case requested, normal aluminum
fins or epoxy-coated aluminum finned coil could be used.
2.5. External Axial Fans
The only purpose of these fans outside of the unit is to enable air flow over condenser coils of the device and
gas temperature within the heat exchanger to change. These fans are exposed to severe air conditions
because they work at outer environments. Fans should be controlled regularly and they should be made sure
to be uncovered by no object. Objects to affect air flow negatively causes that the fan doesn’t function and
accordingly causes to disturb operation of the system.
2.6. Indoor Fans
These fans are found within the device and their purpose is to direct conditioned air needed by user to the
ambient. This is done only by using the inner air or by partially taking from the outer air. The system was
designed to produce pressure and air flow, and for this inner unit fan cycles should be adjusted according to
system requirements. For this, fans could be set into variable cycles by frequency inverter control. The
device could be adjusted to the system in an easy, fast and economic way (optional feature).