PBSM-68DS12K20
Vertical water-to-air — largest single-compressor
Original equipment photo · exact model unconfirmedPublished source values
Stage numbers and row order follow the source, including its inconsistencies. Spacing is normalized; rows without a printed step number are labelled “Single stage”. Each stage has its own heating, cooling and COP values. Capacity numbers are Btu/h at the stated entering water temperatures (EWT).
| Source stage | Heat 50°F | Heat 32°F | Cool 50°F | Cool 70°F | COP 50°F / 32°F | Source “SEER” 50°F / 70°F |
|---|---|---|---|---|---|---|
| Step 1 | 46,000 | 40,000 | 50,000 | 46,000 | 4.4 / 3.9 | 17.9 / 17.1 |
| Step 2 | 68,000 | 60,000 | 74,000 | 68,000 | 4.3 / 3.8 | 17.6 / 16.7 |
COP pairs follow the corresponding capacity row in Dennis Campbell's printed table. Cooling efficiency values use the source’s “SEER” label and stated water temperatures; these are not represented as independently certified seasonal ratings. No independent test report was supplied.
Electrical and cabinet notes
230 V single phase indicated by “D” in this family’s source nomenclature; confirm exact configuration with engineering. Cabinet values describe the source family envelope. Confirm clearance, shipping dimensions, voltage and accessories before specifying equipment.