Danfoss SM 115, SM 125, SM 175, SM 185 Installation guide
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 lter-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 conguration, 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.
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 modications may also be needed
and should be done so as to avoid any signicant
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 lter-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.
Danfoss Scroll
Model (from
Nameplate)
SM115S3CC SM115-3QAI
SM115 S4 CC SM115 -4 QA I
SM125S3CC SM125-3QAI
SM12 5S4 CC SM12 5-4QAI
SM175S3CC SM175-3QAI
SM175S4CC SM175 -4QAI
SM185S3CC SM185-3QAI
SM185S4 CC SM185- 4QAI
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).
Universal
Replacement Scroll
© Danfoss | DCS (CC) | 2015.12
FRCC.PI.042.A1.02 | 1
Compressor Installation Instruction
Compressor Mounting
Composition of compressor mounting kits (Supplied with the compressor)
Ref. Description Qty.
Rubber grommet 4
Sleeve for grommet 4
Flat washer 4
Spring washer 4
Screw HM8 4
Nut HM8 4
Restrictor 1- 3/8" 1
Restrictor 1- 5/8" 1
Spacer 1
The bolts size for these compressors is HM8. These
bolts must be tightened to a torque of 21Nm. The
bolts, washers, and nuts are supplied with the
compressor mounting kits.
Oil Equalization Connection
The SM115-125-175-185 are equipped with a 3/8"
oil equalization tting. When two or more compressors are mounted in parallel, the FSA33 are
adapter must be used to connect the oil equalization line to the compressor oil equalization tting.
The bolts size for these compressors is HM8. These
bolts must be tightened to a torque of 21Nm. The
bolts, washers, and nuts are supplied with the
compressor mounting kits.
FSA33: Danfoss code number 023U801466
Suction Line Restrictor
In CSHA-CSHS manifolded compressor assemblies only, a restrictor must be placed in the suction tting of the replacement compressor when
the replacement is “downstream” of any CSHS
compressor.
Required restrictor location
CSHA CSHS
The 1-3/8" restrictor is used for SM115-125 units,
the 1-5/8" restrictor is used for SM175-185. The
restrictors are supplied with the compressors.
The use of a restrictor is not necessary when CSHA
is installed in rst upstream position or all compressors in the manifold set are CSHA models.
Place restrictor into suction connection, then
braze suction line into place
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This
also applies to products already on order provided that such alterations can be made without subsequential changes being necessary in specications already agreed. All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.
2 | © Danfoss | DCS (CC) | 2015.12
FRCC.PI.042.A1.02
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