SystemAir Topvex SoftCooler TR09-15, Инструкция по эксплуатации и обслуживанию

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12 | Cooling flow chart
These parameters optimize the initial start-up phase of the motor and the relative
estimate of the position and the motor speed.
Special function settings to perform the direct writing of a specified parameter new value
into Power+.
6.2.3 Power controlling
Control unit in the air handling unit gives a demand signal (
Cooling (SEQ-C)
, 0-10V DC) in proportion to the current
cooling demand in the extract air (or room). The signal is, via a relay (R1), connected to an analog input in the program-
mable controller. When the signal is connected (R1) actuates and the compressor starts and the speed is then con-
trolled according to the demand signal between min. frequency (20 rps) and max. frequency (depends on unit size but
still max. 120 rps).
6.2.4 Compressor protection
The compressor is protected by the following:
• Motor protection in the frequency converter (FC)
• High pressure switch in the high pressure side (PSH)
• Low pressure switch on the low pressure side (PSL)
• Hot gas thermostat on the hot gas tube (HGS)
• If any of the above protections is triggered control unit will show
Malfunction cooling (SEQ-C)
. Manual ac-
knowledgment and reset must be done before the compressor can start again.
6.2.5 Refrigerant
The refrigerant is of type R410 A, the system comes pre-filled and tested at the factory. On top of the Topvex Soft-
Cooler are the high- and low pressure side measuring points (tappings). Concerning the control and reporting of the re-
frigerant installation, see chapter 4.
6.2.6 Condenser/Evaporator
The condenser and evaporator coil is made of copper tubes with aluminium fins.
6.2.7 Drip tray
The drip tray is located under the evaporator/brine coil and collects the water condense that periodically occur during
the cooling operation. The drip tray is made of stainless steel and has a 32 mm connection for connecting the drain pipe.
The drip tray has an electrical heater to prevent the water condense from freezing.
6.2.8 By-pass damper (accessory)
The by-pass damper is controlled by a relay (R2) that, via the control unit, actuates at cooling demand and thereby clos-
ing the damper (DBEH) so that the exhaust air is forced through the condenser coil.
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