Instructions
Universal Scroll Compressors Installation
Replacing Danfoss Scroll Compressors
General
Danfoss Universal Replacement Scrolls have the same capacity, connection locations and footprints as Danfoss Scrolls.
Replacement Procedure
1.Be sure the system is properly cleaned before installing the new compressor. Failure to remove moisture, acid and other contaminants from the system will result in repeat compressor failures. As a minimum, replace filter-driers, inspect electrical components for damage and ensure the moisture indicator is reading “dry”.
2.Follow all recommendations in Danfoss instruction FRCC.PI.003 for proper removal and installation of the compressor.
3.If the compressor being removed is in a tandem, trio or quarto configuration, the integrity of the existing pipe must be maintained. The piping included tees and restrictors that ensure proper oil return to the compressors. If this piping is damaged, contact the Danfoss factory for replacement parts at 1-888-DANFOSS (1-888-326-3677)
4.If the existing compressor has rotolock connections, the service valves or solder sleeves will have to be removed from the piping before the new compressor can be Installed.
Danfoss Scroll |
Universal |
Model (from |
Replacement Scroll |
Nameplate) |
|
|
|
SM115S3CC |
SM115-3QAI |
|
|
SM115S4CC |
SM115-4QAI |
|
|
SM125S3CC |
SM125-3QAI |
|
|
SM125S4CC |
SM125-4QAI |
|
|
SM175S3CC |
SM175-3QAI |
|
|
SM175S4CC |
SM175-4QAI |
|
|
SM185S3CC |
SM185-3QAI |
|
|
SM185S4CC |
SM185-4QAI |
|
|
Replacing non-Danfoss Scroll Compressors
General
Danfoss Universal Replacement Scrolls have nearly the same capacity as other Commercial Air Conditioning Scrolls in the marketplace. Connection positioning and mounting hole locations will vary by manufacturer. Use the template included with this kit to locate the mounting holes for the Universal Replacement Scroll. Suction and discharge line modifications may also be needed and should be done so as to avoid any significant additional pressure drops across the system.
Replacement procedure for single compressors
1. Be sure the system is properly cleaned before installing the new compressor. Failure to remove moisture, acid and other contaminants from the system will result in repeat compressor failures.
As a minimum, replace filter-driers, inspect electrical components for damage and ensure the moisture indicator is reading “dry”.
2.Ensure all electrical components (contactors, fuses, crankcase heaters, etc) are appropriately sized for the new compressor being installed. Motor data for the Universal Replacement Scroll can be found on the compressor Nameplate.
3.Some Commercial Scroll compressors are manufactured with internal motor protection, or with a solid-state module mounted in the compressor’s electrical box. The Universal Replacement Scroll is manufactured with an internal thermostat to protect the compressor against excessive temperatures. There is no protection against a high amp draw. An external overload must be used.
4.Follow all recommendations in Danfoss instruction FRCC.PI.003 for proper removal and installation of the compressor.
5.If the existing compressor has rotolock connections, the service valves or solder sleeves will have to be removed from the piping before the new compressor can be Installed.
Replacement procedure for multiple compressor circuits
Danfoss Universal Replacement Scrolls can only be used in multiple compressor circuits in certain situations. Contact the Danfoss factory for technical assistance at 1-888-DANFOSS (1-888-326- 3677).
© Danfoss | DCS (CC) | 2015.12 |
FRCC.PI.042.A1.02 | 1 |
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