Compressor — R454C compressor with a 10-coefficient AHRI 540 map.
A Copeland listing, from the manufacturer's published data.
| Model | Copeland RST68C2U-CFA (R454C hermetic recip, 60 Hz, EM) |
| Refrigerant | R454C |
| Performance data | AHRI 540 / EN 12900 10-coefficient map |
| Reference superheat / subcool | 34.7 / 0.0 K |
AHRI 540 / EN 12900 ten-coefficient polynomials in evaporating and condensing temperature, rated at 34.7 K superheat and 0.0 K subcooling; the solver corrects them to the operating superheat and subcooling. Envelope: the manufacturer's 5-sided polygon. The mass-flow coefficient set is published too, and the solver checks it against the capacity set.
| te / tc °C | Capacity kW | Power kW | COP |
|---|---|---|---|
| -30 / 30 | 0.87 | 0.60 | 1.47 |
| -30 / 40 | 0.75 | 0.62 | 1.21 |
| -20 / 30 | 1.43 | 0.74 | 1.93 |
| -20 / 40 | 1.25 | 0.79 | 1.58 |
| -20 / 60 | 0.84 | 0.87 | 0.96 |
| -10 / 30 | 2.25 | 0.90 | 2.50 |
| -10 / 40 | 1.97 | 0.98 | 2.01 |
| -10 / 60 | 1.38 | 1.12 | 1.23 |
| 0 / 30 | 3.31 | 1.04 | 3.18 |
| 0 / 40 | 2.90 | 1.16 | 2.50 |
| 0 / 60 | 2.06 | 1.37 | 1.50 |
Points on a 10 K grid inside the published envelope; the builder solves any point in it, and warns past it.
Open the builder and pick this listing from the catalog picker — the solver runs it with the catalog's own figures, at your design point or across a year of weather.
| compressors | Copeland RST68C2U-CFA (R290 hermetic recip, 60 Hz, EM) | R290 |
| Compressor maps converted from the vendor's own rating database | 4 776 maps | every basis median within 3.2 % of the nomenclature; the vendor's polynomial substituted exactly, never refitted |
From the validation page; every row is held by a test.
Listed from published data; a listing's figures are the manufacturer's, the model that runs them is ours. Solver results never depend on who has claimed what.