Cooling
16
16. Commissioning
Final checks
Prior to starting the system, final checks should be made to the wiring, ensuring all connections are correct and tight. Before
operating the units, check that all guards, motors, mountings and electrical covers are secure, and that all necessary terminal
block links are added/removed and that fans rotate freely.
Compressor rotation
Important: Scroll compressors will only compress in one rotational direction.
Three-phase compressors will rotate in either direction depending upon phasing of the power to T1, T2 and T3. Verify that the
compressor rotation is correct by checking the suction pressure drops and the discharge pressure rises when the compressor is
running. If the compressor rotation is incorrect, the compressor will be very noisy and current draw substantially reduced. Correct
the rotation by swapping over any two of the supply phases, if required.
17. BMOP functions
Fan speed controller BMOP
The Series P315PR Controllers are pressure-actuated controllers for electronically commutated motors, suitable for direct mount
applications. The P315PR Controllers are suitable for noncorrosive refrigerants under normal environmental conditions.
The Series P315PR is mounted directly to the Liquid line and controls the EC Fan based on the condensing pressure. It comes
pre-set at 14barg for optimal performance, but can be adjusted if need via the screw on the back of the device.
• Turning in the Clockwise direction will increase the condensing pressure
• Turing in the Anit-Clockwise direction will reduce the condensing pressure
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