GMCC KSK103D32UEZ31 Rotary Compressor: R32/R410A Technical Data, DC Inverter Performance and Selection Guide

The GMCC KSK103D32UEZ31 is a hermetic DC inverter single-cylinder rotary compressor rated at 10.3 cm3/rev displacement, 3,245 W cooling capacity, 850 W input and a coefficient of performance of 3.82 under the manufacturer's SEER60 test condition. It accepts R32 and R410A.

Author: AUTHOR_NAME, AUTHOR_JOB_TITLE, refrigeration and air conditioning equipment sourcing specialist at Qishanr Technologies. Reviewed against the GMCC Rotary Compressor Product Manual 2024. Published YYYY-MM-DD. Updated 2026-09-24.

What is the GMCC KSK103D32UEZ31?

The KSK103D32UEZ31 is the first of four 10.3 cm3/rev single-cylinder DC inverter models that GMCC prints in the R32 and R410A section of its current rotary compressor manual, and it sits in this site's GMCC rotary compressor range. It carries the highest printed input of the four, and the lowest printed coefficient of performance, which makes it the reference operating point of the displacement rather than its efficiency leader.

That position is the most useful fact about this part number, and the table below is where it becomes visible. A buyer who arrives at 10.3 cm3/rev finds four rows printed as current products under one group heading, all at the same swept volume, all with the same suction and discharge diameters, and all rated within 25 W of each other in capacity. What separates them is the electrical input, and the spread is wider than the capacity spread by a factor of about six. For a system designer that means displacement does not decide the selection at this point in the range; the input the design can afford decides it.

The table below collects the published figures for this part number. Each row names where the figure comes from, because a compressor data sheet is only as useful as its traceability: a capacity figure without its test condition is not a specification, it is a number.

Two entries in this table deserve a note before they are used. The absence of a run capacitor is meaningful rather than missing data: the manufacturer prints a numerical capacitor value for every fixed-speed row in the same manual and a dash for every inverter row, so the dash is consistent with the inverter drive the group heading names. The test condition code SEER60 is printed as a label and is the seasonal efficiency condition the manufacturer applies to this group; it is not a measurement of any particular installed system.

The density figures in the table, 315.0 W and 82.5 W per cm3/rev, are derived here rather than published. They are included because comparing compressors of different displacement is otherwise impossible, and because they make the step from the adjacent 8.9 cm3/rev family expressible as a number. They must not be quoted as manufacturer ratings.

Technical specifications and what each number is based on

A specification table in a selection guide has one job beyond listing values: it has to make clear which values are measured, which are printed and which are computed. The table below separates those three cases for every figure this guide uses.

The two arithmetic checks matter more than they might appear. The manufacturer prints a metric capacity, an imperial capacity, an input and a coefficient of performance for every row, and those four numbers are not independent: the imperial figure is the metric figure converted at 3.412 Btu per watt-hour, and the coefficient is the capacity divided by the input. Both relations hold exactly on this row, to the rounding of the printed figures. That does two things. It confirms that the row was transcribed correctly from the source, and it confirms that the row belongs to the group heading printed above it rather than to a neighbouring group, because rows read from the wrong group would not reproduce their own internal arithmetic.

A second kind of check applies to the whole group, and it is where the manual has something to disclose. Of the rows printed on the same page under the same family of headings, one row in the twin-cylinder column, KTF400D64UMTA at 39.8 cm3/rev, prints an imperial capacity that is about 26 Btu/h below its own metric capacity converted at 3.412. That row is not the row for this model, it is in a different cylinder class and a different part of the table, and it is not corrected or used as evidence here. It is disclosed because a reader comparing several rows in the same document is entitled to know that not every printed figure in it survives the arithmetic check, and because the alternative, silently showing only the rows that reconcile, would misrepresent the source as cleaner than it is.

How to read the KSK103D32UEZ31 model number

The manufacturer publishes a naming legend for its rotary compressor range, and it is worth decoding this part number against it, because two segments of the string carry selection information that the table does not repeat.

Two positions in this string cannot be fully decoded, and that is a statement about the manufacturer's documentation rather than about the compressor. The manufacturer publishes two naming legends in the edition reviewed, one for the general model construction and one for special specifications, and neither of them defines the third position of this string or the trailing markers after the power code. The displacement block and the power code can be decoded because the printed table independently confirms both, which is the standard this guide applies: a decoded segment is only reported as decoded when a second source agrees with it.

The displacement block needs one warning attached to it, and the warning is not theoretical. The block is a run of digits whose length changes across the range: two digits in KSK89D35UEZ3, three in this part number and in KSF230N1VKTB. Dividing the block by ten returns the printed displacement for most of the range, but it does not for one family. The manufacturer prints 10.3 cm3/rev for KSN108D42UEZ31 and 9.8 cm3/rev for KSN108D54UFZ3, and this site's own page for a third member of that block, KSN108D22UFZ, states 10.8 cm3/rev. The same three digits therefore appear against three displacements in the documents available here, so the block cannot be read as a displacement. A buyer who needs the swept volume reads it from the model's own row, and a buyer who reads 10.8 from the string has not verified the part.

The power code is worth one further check, because it can be tested against output the manufacturer did not intend as a naming check. GMCC part numbers carry the supply class in the letter that follows the displacement block, and this site's own model pages print the drive or the supply for each part number they cover. On the pages available for comparison the position holds: every string whose power code is D is a page that prints a DC inverter drive, and every string whose power code is V is a page that prints a 50 Hz single-phase supply.

One caveat belongs with this table, and it is a caveat about the site rather than about the compressor. Several of these pages state the drive type in a row that is labelled for voltage rather than for drive, so the value a reader sees under the heading Voltage on those pages is a drive description such as DC inverter rather than a voltage figure. Two of the pages checked print a twin-cylinder description in that same row even though the structure code in their own model strings is the single-cylinder code, and one page states a displacement that differs from the manufacturer's printed figure for the same displacement block. Those are defects in the site's own product templates, they are not data about this compressor, and this guide does not reproduce any of them as a specification. The table above uses those pages only for the drive or supply class they state, which is the one field all of them agree on and which the manufacturer's table independently confirms through the group heading.

Where the KSK103D32UEZ31 sits in GMCC's 8.2 to 10.3 cm3/rev group

The manufacturer prints this model inside a group of single-cylinder DC inverter rows rated under one heading for R32 and R410A at the SEER60 condition, and this site indexes the family inside the wider rotary compressor category. Reading the whole group rather than the single row is what makes the positioning visible, because the group shows how the manufacturer spends displacement, shell height and efficiency across a family that was clearly designed as a range rather than as a set of unrelated parts.

Every row in this table is a manufacturer's printed row from the same page and the same group heading, and every row has been checked against its own internal arithmetic. This model's row is in bold. The rows are shown so that a buyer can see the shape of the range rather than a single point in it.

Four things are visible in the table. The first is that the same displacement does not imply the same rating, which the three 10.3 cm3/rev rows demonstrate directly. The second is that the manufacturer reuses one mechanical envelope across a wide band: rows from 7.5 to 14.0 cm3/rev share a 240 to 260 mm height, an 8.1 mm suction connection and either a 9.8 or a 12.9 mm discharge. The third is that connection diameter does not track displacement in a simple way, because the 8.2 cm3/rev row carries a 6.15 mm suction while rows above and below it carry 8.1 mm. The fourth is that the displacement digits in the part number and the printed displacement do not always agree, which the 108 block shows and which its own section below sets out.

A note on scope. The group table above is the single-cylinder R32 and R410A set printed under a DC inverter heading at the SEER60 condition. Two further model strings are printed in the same group but are absent from the table, KSK53D15UEZ3 and KSN108D34UEZ3, because their numeric cells do not survive text extraction from the manual; they are named here so that the table is not read as the complete group. It is not the whole dealer catalogue and it is not every GMCC compressor at these displacements. Rows from other groups in the same manual, including the fixed-frequency and the higher-pressure sections, are not comparable with these rows and are deliberately absent, because a capacity figure from another group is measured at a different condition and combining the two would produce a comparison that looks precise and is not.

Does holding displacement fix the rated capacity in this group?

It does not, and at 10.3 cm3/rev the effect is sharper than anywhere else in the group. Four rows share the displacement, and they hold their capacity to within eight tenths of one percent while their input power spans almost five percent.

Across the four rows the capacity spans 25 W, from 3,230 W to 3,255 W, which is 0.77 percent of the lowest figure. The input spans 38 W, from 812 W to 850 W, which is 4.68 percent of the lowest figure. The coefficient of performance spans 0.16, from 3.82 to 3.98, which is 4.19 percent of the lowest figure. Read as a sequence ordered by input, the family walks from the lowest input and the highest efficiency at one end to the highest input and the lowest efficiency at the other, and the capacity barely moves while it does.

The row for this model sits at the high-input end of that sequence. It prints the lowest coefficient of performance of the four, and it shares the 240 mm shell height with only one other row in the family, KSK103D26UEZD3, which is rated five watts lower in capacity and ten watts lower in input for a coefficient four hundredths higher. Stated plainly: at this displacement the manufacturer offers four operating points at effectively one capacity, and the choice between them is a choice about input, not about how much cooling the compressor delivers.

Nothing in the four model strings explains the progression through the published legends, because the segments that change are the trailing variant markers rather than the decoded positions. The progression is therefore reported here as a pattern in the manufacturer's printed data, not as a rule derived from the naming convention. What can be said from the printed data is what the table shows: the manufacturer's range carries multiple efficiency levels at a fixed displacement and an effectively fixed capacity, and the only way to identify which level a particular part number delivers is to read its row.

The same pattern appears in the other displacement families in the group, with different capacity spreads. At 9.8 cm3/rev, six rows share one capacity of 3,070 W and an imperial figure of 10,475 Btu/h, and differ only in the input they consume to reach it, which falls from 784 W to 758 W and takes the coefficient from 3.92 to 4.05. At 12.0 cm3/rev the two rows share a capacity of 3,730 W and differ in input by 25 W. At 14.0 cm3/rev the three rows share a capacity of 4,350 W and differ in input by 30 W. The 10.3 cm3/rev family is the only one in the group where the capacity itself moves at all between members, and it still moves by less than one percent.

For the KSK103D32UEZ31 specifically, the consequence is that a designer who needs less input at this displacement has a printed alternative in the same family and the same page, and a designer who needs a 240 mm shell at 10.3 cm3/rev is choosing between two rows rather than four. A designer who needs the 3,245 W figure itself is choosing this row, because no other row in the family prints it.

Stepping up from 8.9 cm3/rev to 10.3 cm3/rev

The nearest smaller family in the same group is the pair of 8.9 cm3/rev rows, and the step from the more efficient of them to this part number is the comparison a product planner needs when a platform has to grow within one chassis.

The arithmetic of this step is worth stating plainly, because it is what a platform decision turns on. Fifteen and seven tenths percent more swept volume buys sixteen and three tenths percent more rated capacity and costs eighteen and nine tenths percent more input, so the coefficient of performance falls by a little over two percent. Expressed per unit of swept volume rather than per unit of capacity, the larger compressor delivers almost exactly the same cooling intensity, half a percent more, while drawing two and seven tenths percent more input intensity. That is the signature of a window that has been widened rather than of a more efficient machine, and it means the step up is a capacity purchase rather than an efficiency purchase.

For a system designer the practical consequences are specific. The shell height, both connection diameters and the mounting envelope are unchanged, so neither the pipe work nor the chassis has to be redesigned and the substitution is a data-sheet decision. The rated capacity rises by 455 W, which is enough to move a small split into the next capacity class. The input rises by 135 W at the rated point, and the rated efficiency falls, so a platform that steps up to this displacement gives up a small amount of published efficiency to gain the capacity. And because both are inverter rows, the capacity can be modulated in either case, which means the step changes the shape of the modulation range rather than the ability to modulate at all.

There is one further consideration that decides the choice for many projects, and it is not on the data sheet. Optimising a compressor's rated point for efficiency typically shifts where the efficiency peak sits on the operating map. Two rows at different displacements with different rated points are not evidence that one dominates the other across the whole envelope; they are evidence that the manufacturer has characterised the two differently. A selection should therefore be made against the part-load conditions the system will actually see, which means asking the manufacturer for the performance map rather than choosing on the single catalogue point. The catalogue point is sufficient to shortlist the two rows. It is not sufficient to award one of them. This site carries a selection guide for the 8.9 cm3/rev row, KSK89D35UEZ3 guide.

Which chassis does the KSK103D32UEZ31 share?

The KSK103D32UEZ31 sits inside a mechanical envelope that the manufacturer reuses from 7.5 cm3/rev to 10.3 cm3/rev, which is a displacement spread of about 37 percent across one 240 mm shell and one pair of connection diameters. That is the practical meaning of a chassis in this context, and it is the single most useful thing a product planner can take from the range: a family of air conditioning products can be moved up or down the capacity band without redesigning the pipe work, the mounting or the cabinet space allocated to the compressor. This site carries a selection guide for the smaller DC inverter member of the same family, the DC inverter KSK75D43UEZA guide.

Two limits on that reading should be stated. Sharing a printed envelope is not a guarantee of interchangeability, because the mounting feet, the accumulator and the internal clearances are not printed in the table used here, and a substitution within the envelope still has to be confirmed against the manufacturer's drawing for the specific part. And the envelope does not extend without limit: the fourth 10.3 cm3/rev row in the family moves to a 250 mm height at the same displacement and the same connections, and the rows above this band move to 260 mm, so the flat envelope is a property of this band rather than of the whole range.

Why is this compressor on R32 and R410A, and what does that mean for a system?

The group heading for this row names both R32 and R410A, and that is not a formality. It means the manufacturer rates one mechanical platform for two refrigerants that differ in pressure, in volumetric capacity and in the safety classification they carry, and a buyer has to decide which of the two the system will use before the compressor is ordered rather than after.

The table is deliberately short, because the manufacturer's compressor manual does not print a refrigerant comparison and this guide does not invent one. The entries that are drawn from published sources are the composition of R410A and the A2L classification of R32, both of which come from the standards and regulatory sources registered at the end of this guide. The design pressure ordering follows from the refrigerants' own properties rather than from a compressor figure.

What the compressor table does establish is where the responsibility sits. Because one platform is rated for both refrigerants, the compressor is not the component that decides the refrigerant; the system is. A buyer replacing a compressor in an existing R410A unit must replace it with an R410A unit, because the oil and the metering device in that system were selected for a blend at a given pressure. A buyer designing a new platform can choose either, and the choice then propagates into the charge limit, the leak detection and the siting of electrical components through the A2L requirements.

The European prohibition schedule is the other half of that decision, and the thresholds are what the substance does or does not clear rather than the dates alone. R32 has a 100 year global warming potential of 675, which sits below the 750 threshold applied to single split air conditioning with a charge under 3 kg from January 2025. It sits above every 150 threshold in the schedule, and those arrive for self-contained air conditioning and heat pumps and for split air-to-water systems in 2027, for split air-to-air equipment up to 12 kW in 2029, for larger split systems in 2033, and as a prohibition on any fluorinated greenhouse gas in split systems up to 12 kW in 2035. The values in this paragraph are published by the European Commission's assessment of climate-friendly alternatives to F-gases, which draws them from the annexes of Regulation (EU) 2024/573, and the German Environment Agency publishes a global warming potential table keyed to the same regulation for reference values across substances. The role of refrigeration and cooling demand in the wider market is set out in the International Energy Agency's report The Future of Cooling.

One boundary belongs in the same paragraph. This guide describes where R32 stands as a substance. It does not state that any particular appliance complies with anything, and no certificate held by this compressor is claimed here. A2L is a classification that places obligations on the finished product, and the completed unit is assessed against the product-level safety standard rather than against the compressor standard alone.

Which standards apply to a compressor like this?

Pointing at a standard is not a claim that this compressor has been assessed against it. The compressor standard covers the compressor as a component. The appliance standards cover the finished product, and it is the finished product that carries the refrigerant charge and therefore the refrigerant safety obligations. The performance rating standard is a measurement convention rather than a safety requirement, which is why the same compressor can carry two capacity figures under two conventions without either being wrong. This guide also cites three International Organization for Standardization entries by number rather than by link, because the standard catalogue entries could not be retrieved programmatically during the preparation of this guide; the standards are named so that a reader can locate them directly.

Which applications suit the KSK103D32UEZ31?

The rating basis is the first thing to settle, because it decides which applications the published data actually supports.

• Residential split air conditioning and small multi-split systems. At 10.3 cm3/rev with 3,245 W of rated capacity under a seasonal efficiency condition, this is a single split or small multi-split compressor, and the inverter drive allows the capacity to be modulated to the load rather than cycled.
• Applications where the design point sits inside the 240 mm envelope band. The shell height, the suction diameter and the discharge diameter are shared with rows from 7.5 cm3/rev upward, so a platform already built around that envelope can adopt this displacement without reworking the pipe work or the chassis.
• Platforms that need the largest printed capacity of this family. This row prints 3,245 W where its siblings print 3,230 W, 3,240 W and 3,255 W. The differences are small, but a design that has been costed against one of those figures can be matched to the closest printed row rather than to a rounded number.
• Platforms being positioned between efficiency tiers. The four-row 10.3 cm3/rev family and the six-row 9.8 cm3/rev family in the same group show that this range is designed to be moved between efficiency levels at an effectively fixed capacity.
• New builds choosing between R32 and R410A. The platform is rated for both, so the refrigerant decision can be made on the system's compliance position rather than on compressor availability.
• Not for a duty that depends on a refrigeration rating condition. The published rating for this row carries a seasonal efficiency condition, which is an air conditioning basis. A buyer sourcing this part against a refrigeration or freezer duty point, or against a low-temperature evaporating condition, does not have a rating for that duty in this document, and should not treat the 3,245 W figure as one. The manufacturer prints separate low-pressure and refrigeration sections, and the correct part for such a duty has to be selected from those.

That exclusion is not a technicality. The manufacturer's section heading for this page addresses air conditioning compressors, and the condition code attached to the rating is a seasonal efficiency condition rather than a refrigeration pull-down condition. This site's own product pages for members of the same family list refrigeration and chiller among their applications, and that listing is a statement about what a compressor can be built into rather than a published rating at a refrigeration condition. The two claims are not in conflict, but only one of them is supported by a printed capacity figure, and it is the air conditioning one.

Selection checklist

1. Confirm the refrigerant the system will use. The platform is rated for R32 and R410A, and the choice changes pressures, the metering device and the compliance position. Settle it before ordering, not after.
2. Check the drive class. This part number carries the DC inverter power code. A fixed-speed drive board will not run it, and an inverter board selected for a fixed-speed compressor will not either.
3. Read the displacement from the model's own row. The three-digit block in the string returns the printed displacement for most of this range but not for all of it, and the 108 block is printed against more than one displacement across the documents available here. Do not size the compressor from the string.
4. Decide whether the input matters more than the printed capacity. Three rows in the same family and the same page print between 38 W and 20 W less input for capacities within 25 W of this one, at coefficients up to 3.98. That trade decides the selection more often than any other single figure.
5. Confirm the shell height if the cabinet is fixed. This row and KSK103D26UEZD3 print a 240 mm shell at 10.3 cm3/rev; the other two family members print 250 mm and 270 mm. A cabinet sized for one will not accept the others without checking the drawing.
6. Match the duty point to the published rating basis. The published figures carry a seasonal efficiency condition, which is an air conditioning basis. If the design point is a refrigeration or low-temperature evaporating condition, request the rating for that condition rather than extrapolating from this one.
7. Verify the envelope against the drawing. The 240 mm height and the 8.1 mm and 9.8 mm connections are printed, but mounting feet, accumulator position and internal clearance are not printed in the table used here. Confirm them against the manufacturer's drawing for the specific part.
8. Ask for the part-load performance map. Two rows at one displacement with different rated points are characterised differently. A single catalogue point shortlists a compressor; it does not award one.
9. Establish the compliance position for the refrigerant. The global warming potential of R32 is above every 150 threshold in the European schedule. The dates and thresholds are in the section above and should be checked against the market the product will be sold in.
10. Request the figures the table does not print, and the current document. Mass, oil charge, running speed, locked rotor current and sound power level are absent for this row in the edition reviewed, so a system design that needs any of them needs them from the manufacturer. The figures here come from the edition registered at the end of this guide, ratings are revised, and a compressor selected on a superseded table is a project risk rather than a sourcing saving.

Frequently asked questions

Is the KSK103D32UEZ31 a fixed-speed compressor or an inverter compressor?

It is an inverter compressor. The group heading printed above its row names a DC inverter single-cylinder structure, its power code is D, which the manufacturer's legend defines as DC inverter, and its run capacitor cell is printed as a dash, which is how the same manual prints every inverter row and how it never prints a fixed-speed row. A fixed-speed drive should not be used with it.

What is the difference between the KSK103D32UEZ31 and the KSN108D42UEZ31?

They are the same displacement and effectively the same capacity with different rated points. KSK103D32UEZ31 is rated at 3,245 W for 850 W of input, a coefficient of performance of 3.82. KSN108D42UEZ31 is rated at 3,230 W for 812 W, a coefficient of performance of 3.98. The second gives up 15 W of capacity to save 38 W of input, which is a 4.19 percent efficiency advantage. The two are printed in different model families, and their strings differ in the family letter and in the trailing markers, but the manufacturer prints both at 10.3 cm3/rev under the same group heading.

Is there a more efficient option at the same displacement?

Yes, three of them. Under the same group heading, KSK103D26UEZD3 is rated at 3,240 W for 840 W, KSK103D33UEZ3 at 3,255 W for 830 W and KSN108D42UEZ31 at 3,230 W for 812 W, against this row's 3,245 W for 850 W. The coefficients rise across those three rows from 3.86 to 3.98. A buyer who needs the lowest input at this displacement has printed alternatives in the same group, and a buyer who needs a 240 mm shell is choosing only between this row and KSK103D26UEZD3.

What is the difference between the KSK103D32UEZ31 and the KSK89D35UEZ3?

They are 10.3 and 8.9 cm3/rev respectively, in the same chassis. KSK103D32UEZ31 is rated at 3,245 W for 850 W of input, a coefficient of performance of 3.82. KSK89D35UEZ3 is rated at 2,790 W for 715 W, a coefficient of performance of 3.90. The larger compressor delivers 16.31 percent more capacity for 18.88 percent more input, so the step up buys capacity at the cost of a 2.05 percent lower published efficiency. Both rows share the 240 mm height and the 8.1 mm and 9.8 mm connections, so the substitution is a data-sheet decision rather than a redesign.

Can I use the published 3,245 W figure for a refrigeration or chiller duty point?

No, not without a rating for that condition. The figure is published under a seasonal efficiency condition, which is an air conditioning basis, and the section this row is printed in addresses air conditioning compressors. The manufacturer prints separate sections for other duty ranges, and a refrigeration or low-temperature selection should be made from those. This site's own pages for related models list refrigeration among their applications, which is a statement about what a compressor can be built into rather than a published capacity at a refrigeration condition.

What refrigerant does the KSK103D32UEZ31 use?

The group heading names R32 and R410A, so the platform is rated for both. R32 is a single substance with a safety classification of A2L and a 100 year global warming potential of 675. R410A is a blend containing R32 and R125 and carries the A1 classification. Because both refrigerants are handled with polyol ester oil, the oil family is common to the two, but the metering device, the charge procedure and the product-level safety requirements differ, and the refrigerant must be fixed before the compressor is ordered.

Where can I obtain the official GMCC document for this model?

The manufacturer publishes its rotary compressor documentation through its own product centre and its downloads page, where the product manual is distributed after a form submission. The edition this guide was checked against was read from a distributor-hosted copy of the GMCC Rotary Compressor Product Catalog 2024, which is named here as a third-party host rather than presented as a manufacturer address. Further GMCC model guides are indexed in this site's GMCC model guides on this site.

Does this compressor carry a certificate for any particular market?

No certificate held by this compressor is claimed in this guide, and none was sighted during its preparation. The standards named above are the frameworks a compressor and the appliance built around it are assessed against; naming a framework is not a certification claim. Market entry documentation should be requested from the manufacturer or the distributor for the specific market and application.

Sources and verification notes

The figures in this guide come from the primary register below. Displacement, capacity in both units, input power, coefficient of performance, height and both connection diameters for KSK103D32UEZ31 are taken from one row of the manufacturer's table and the group heading printed above it. Sibling model figures are presented as sibling data and are never offered as data for this part number.

• Manufacturer product centre, the route to the current product categories and the model index: GMCC's official product centre
• Manufacturer downloads page, where the rotary compressor product manual is distributed behind a form: GMCC official downloads page
• The edition this guide was checked against, hosted by a distributor: GMCC Rotary Compressor Product Catalog 2024
• An earlier manufacturer edition on a document platform, used only as a version-enrolment reference: FAWAZ-GMCC Rotary Compressor 2018 catalogue
• Standards and certification bodies, for the four levels of the standards framework: IEC 60335-2-34:2024, IEC 60335-2-89:2019, ANSI/ASHRAE Standard 34, AHRI 540
• Regulation and research, for the refrigerant position and the prohibition dates: European Commission's assessment of climate-friendly alternatives to F-gases, Regulation (EU) 2024/573, global warming potential table, The Future of Cooling
• Site structure and related model pages referenced in the comparison tables: the GMCC rotary compressor range, the rotary compressor category and the individual model pages linked in the model-number section
• Selection guides for adjacent options on this site, for another displacement in the same chassis or for a change of refrigerant: KSF230N1VKTB guide, KSK89D32UEZA31 guide, KSK82D22UEZA31 guide, EKPM310D85UMTR and the non-fluorinated alternative DSG320S1UFT

Five points about evidence limits belong here. First, a second-row check on the page this model is printed on found one twin-cylinder row, KTF400D64UMTA, whose printed imperial capacity is about 26 Btu/h below its own metric capacity converted at 3.412. That row is not the row for this model, is in a different cylinder class, and is neither corrected nor used as evidence here. Second, the test condition code SEER60 is printed as a label in the group heading but is not defined in the edition reviewed, so this guide reports that the rating carries the condition without claiming what the condition consists of; the operating points behind it should be requested from the manufacturer. Third, the group table does not print a mass, an oil charge, a running speed, a locked rotor current or a sound power level for this part number, so none of those is quoted anywhere in this guide. Fourth, the two model string segments that the manufacturer's published legends do not define, the third position and the trailing variant markers after the power code, are reported here as undecoded rather than assigned a meaning. Fifth, the displacement block is reported as unreliable rather than decoded: the block 108 is printed against 10.3 cm3/rev and 9.8 cm3/rev in the manufacturer's own table and against 10.8 cm3/rev on this site's page for a third member of that block, so no displacement is inferred from the block anywhere in this guide.