10.7.2 Rotalock Valve
WARNING! Risk of explosive discharge of high-pressure refrigerant. Can cause serious injury.
Neutral and service ports on the rotalock valve do not have a valve core. Front-seat the service
valves and relieve pressure from the compressor before loosening a part or a component
attached to the service valve. Follow local codes to properly reclaim refrigerant.
• The Neutral port remains open to the compressor side in all positions of the valve stem, Figure
10.13 below. A high-pressure cut-out switch or low-pressure switch/transducer will be
connected to this port.
• The Service port is closed to the system when valve stem is back-seated, Figure 10.13 below. It
is open to the system as soon as the valve is adjusted away from the back-seated position.
Figure 10.13 Rotalock valve
Item Description Item Description
1 Service port (gauge) 4 Compressor side of valve
2 Front seat 5 Neutralport
3 Back seat 6 System side of valve
10.7.3 Replacement Compressors
Replacement compressors are available through your Vertiv sales office. If the unit is under warranty, the
replacement compressor must be obtained from and the original compressor returned to your local Vertiv
sales office. Compressors are shipped in reusable packaging, and the original compressor should be
returned in the same packaging.
10.7.4 Compressor Motor Burnout
If a burnout has occurred, a full system clean-out is required. If not cleaned, compressor and system
problems will continue.
Consult the factory for compressor maintenance. Do not attempt to remove the compressor without first
contacting Vertiv support at 1-800-543-2778.
10.7.5 Unloading Solenoid(s) on a Digital-scroll Compressor
When replacing a digital-scroll compressor, the digital solenoid valve and coil must be replaced. The
compressor and valve kit are shipped separately. The valve kit must be field-brazed to the top of the
compressor in proper orientation and supported with the original factory bracket.
10 Maintenance 71
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