Trane · model number decoder
Trane Precedent YSC/YHC/TSC/THC
Trane's R-410A Precedent light commercial rooftop in cooling-only (TSC, THC) and gas/electric (YSC, YHC) versions. The model number gives efficiency, tonnage, design sequence, voltage, controls, heat and factory options.
Packaged rooftop, cooling only or gas/electric · 3–10 tons · R-410A
Sizes and filter sizes
| Size code | Nominal tons | Filters, standard efficiency (T/YSC) | Filters, high efficiency (T/YHC) |
|---|---|---|---|
| 036 | 3 | (2) 20 x 35 x 2 in. | (2) 20 x 30 x 2 in. |
| 037 | 3 | — | (2) 20 x 30 x 2 in. (17 Plus) |
| 047 | 4 | — | (4) 16 x 25 x 2 in. (17 Plus) |
| 048 | 4 | (2) 20 x 35 x 2 in. | (4) 16 x 25 x 2 in. |
| 060 | 5 | (2) 20 x 35 x 2 in. | (4) 16 x 25 x 2 in. |
| 067 | 5 | — | (4) 16 x 25 x 2 in. (17 Plus) |
| 072 | 6 | (4) 16 x 25 x 2 in. | (4) 20 x 25 x 2 in. |
| 074 | 6 (dual compressor) | — | (4) 20 x 25 x 2 in. |
| 090 | 7.5 (single compressor) | (4) 16 x 25 x 2 in. | — |
| 092 | 7.5 (dual compressor) | (4) 20 x 25 x 2 in. | (4) 20 x 25 x 2 in. |
| 102 | 8.5 | (4) 20 x 25 x 2 in. | (4) 20 x 25 x 2 in. |
| 120 | 10 | (4) 20 x 25 x 2 in. | (3) 20 x 25 x 2 in. and (2) 20 x 30 x 2 in. |
Source: RT-PRC023AY-EN, pages 25, 29, 31, 33, 35, 37; RT-PRC048R-EN, pages 25, 27. Factory filter sizes. Check the rack before ordering; filters get changed over the years.
Trane Precedent YSC/YHC/TSC/THC model number nomenclature
Example: YHC092F4RMA**D0B0000601A1A0. Select a position to jump to its codes.
Position 1 Unit type
| T | Cooling only (electric heat optional) |
|---|---|
| Y | Cooling with gas heat |
RT-PRC023AY-EN, page 25
Position 2 Efficiency
| S | Standard efficiency |
|---|---|
| H | High efficiency |
RT-PRC023AY-EN, page 25
Position 3 Airflow
| C | Convertible (downflow or horizontal) |
|---|
RT-PRC023AY-EN, page 25
Position 4–6 Nominal cooling size
| 036 | 3 tons |
|---|---|
| 037 | 3 tons (17 Plus) |
| 047 | 4 tons (17 Plus) |
| 048 | 4 tons |
| 060 | 5 tons |
| 067 | 5 tons (17 Plus) |
| 072 | 6 tons |
| 074 | 6 tons, dual compressor |
| 090 | 7.5 tons, single compressor |
| 092 | 7.5 tons, dual compressor |
| 102 | 8.5 tons |
| 120 | 10 tons |
RT-PRC023AY-EN, page 25; RT-PRC048R-EN, page 25
Position 7 Major design sequence
| E | Design sequence E (3–6 ton high efficiency, and the 17 Plus 037–067) |
|---|---|
| F | Design sequence F (4–10 ton high efficiency) |
| G | Design sequence G (3–5 ton standard efficiency) |
| H | Design sequence H (6–10 ton standard efficiency) |
RT-PRC023AY-EN, pages 29, 31, 33
Position 8 Voltage
| 1 | 208/230 V, 1 phase, 60 Hz |
|---|---|
| 3 | 208–230 V, 3 phase, 60 Hz |
| 4 | 460 V, 3 phase, 60 Hz |
| W | 575 V, 3 phase, 60 Hz |
RT-SVX21AD-EN, page 7; RT-PRC023AY-EN, page 25
Position 9 Unit controls
| E | Electromechanical |
|---|---|
| R | ReliaTel microprocessor |
RT-PRC023AY-EN, page 25
Position 10 Heat (electric on T, gas on Y)
| 0 | No electric heat |
|---|---|
| A | 5 kW electric heat, 1 phase |
| B | 6 kW electric heat, 3 phase |
| C | 9 kW electric heat, 3 phase |
| D | 10 kW electric heat, 1 phase |
| E | 12 kW electric heat, 3 phase |
| F | 14 kW electric heat, 1 phase |
| G | 18 kW electric heat |
| J | 23 kW electric heat, 3 phase |
| K | 27 kW electric heat, 3 phase |
| N | 36 kW electric heat, 3 phase |
| P | 54 kW electric heat, 3 phase |
| L | Low gas heat |
| M | Medium gas heat |
| H | High gas heat |
| X | Low gas heat, stainless steel heat exchanger |
| Y | Medium gas heat, stainless steel heat exchanger |
| Z | High gas heat, stainless steel heat exchanger |
RT-PRC023AY-EN, page 25; RT-SVX21AD-EN, page 7
Position 11 Minor design sequence
| A | First minor design sequence |
|---|---|
| B | Second minor design sequence |
RT-PRC023AY-EN, page 25
Position 12–13 Service sequence
| ** | Factory assigned. Trane does not publish a code list for these two digits. |
|---|
RT-PRC023AY-EN, page 25
Position 14 Fresh air
| 0 | No fresh air |
|---|---|
| A | Manual outside air damper, 0–50% (ships loose for field install) |
| B | Motorized outside air damper, 0–50% |
| C | Economizer, dry bulb, without barometric relief |
| D | Economizer, dry bulb, with barometric relief |
| E | Economizer, reference enthalpy, without barometric relief |
| F | Economizer, reference enthalpy, with barometric relief |
| G | Economizer, comparative enthalpy, without barometric relief |
| H | Economizer, comparative enthalpy, with barometric relief |
| K | Low-leak economizer with barometric relief |
| M | Low-leak economizer, reference enthalpy, with barometric relief (the 3–10 ton table prints M the same as K) |
| P | Low-leak economizer, comparative enthalpy, with barometric relief |
RT-PRC023AY-EN, page 25; RT-PRC048R-EN, page 25
Position 15 Supply fan / drive
| 0 | Standard drive (direct or belt depends on size and efficiency) |
|---|---|
| 1 | Oversized motor |
| 2 | Optional belt drive motor |
| 6 | Single zone VAV |
| 7 | Multi-speed indoor fan |
| E | VAV supply air temperature control, standard motor |
RT-PRC023AY-EN, page 25
Position 16 Service access / filters
| 0 | Standard panels, standard filters |
|---|---|
| A | Hinged access panels, standard filters |
| B | Standard panels, 2 in. MERV 8 filters |
| C | Hinged access panels, 2 in. MERV 8 filters |
| D | Standard panels, 2 in. MERV 13 filters |
| E | Hinged access panels, 2 in. MERV 13 filters (the 3–10 ton table prints MERV 8; check the rack) |
RT-PRC023AY-EN, page 25; RT-PRC048R-EN, page 25
Position 17 Condenser coil protection
| 0 | Standard coil |
|---|---|
| 1 | Standard coil with hail guard |
| 2 | Black epoxy pre-coated condenser coil |
| 3 | Black epoxy pre-coated condenser coil with hail guard |
| 4 | CompleteCoat condenser coil |
| 5 | CompleteCoat condenser coil with hail guard |
RT-PRC023AY-EN, page 25
Position 18 Through-the-base provisions
| 0 | None |
|---|---|
| A | Through-the-base electric |
| B | Through-the-base gas piping (Y models) |
| C | Through-the-base electric and gas piping (Y models) |
RT-PRC023AY-EN, page 25
Position 19 Disconnect / circuit breaker
| 0 | None |
|---|---|
| 1 | Unit-mounted non-fused disconnect |
| 2 | Unit-mounted circuit breaker |
RT-PRC023AY-EN, page 25
Position 20 Convenience outlet
| 0 | None |
|---|---|
| A | Unpowered convenience outlet |
| B | Powered convenience outlet (3 phase only) |
RT-PRC023AY-EN, page 25
Position 21 Communications
| 0 | None |
|---|---|
| 1 | Trane communications interface (TCI) |
| 2 | LonTalk communications interface |
| 3 | Novar 2024 controls |
| 4 | Novar 3051 controls without zone sensor |
| 5 | Novar 3051 controls interface with DCV |
| 6 | BACnet communications interface |
| 7 | Trane Air-Fi wireless communications interface |
RT-PRC023AY-EN, page 25
Position 22 Refrigeration system
| 0 | Standard refrigeration system (TXV) |
|---|---|
| B | Dehumidification (hot gas reheat) |
RT-PRC023AY-EN, page 25
Position 23 Refrigeration controls
| 0 | None |
|---|---|
| 1 | Frostat |
| 2 | Crankcase heater (17 Plus) |
| 3 | Frostat and crankcase heater (17 Plus) |
RT-PRC023AY-EN, page 25; RT-PRC048R-EN, page 25
Position 24 Smoke detector
| 0 | None |
|---|---|
| A | Return air smoke detector |
| B | Supply air smoke detector |
| C | Supply and return air smoke detectors |
| D | Plenum smoke detector |
RT-PRC023AY-EN, page 26
Position 25 System monitoring
| 0 | None |
|---|---|
| 1 | Clogged filter switch |
| 2 | Fan failure switch (the 3–10 ton table prints “fan filter switch”) |
| 3 | Discharge air sensing tube |
| 4 | Clogged filter switch and fan failure switch |
| 5 | Clogged filter switch and discharge air sensing tube |
| 6 | Fan failure switch and discharge air sensing tube |
| 7 | Clogged filter switch, fan failure switch and discharge air sensing tube |
| 8 | Novar return air sensor (Novar 2024) |
| 9 | Novar zone temperature sensor (Novar 3051) |
| A | Condensate drain pan overflow switch |
| B | Clogged filter switch and condensate overflow switch |
| C | Fan failure switch and condensate overflow switch |
| D | Discharge air sensing and condensate overflow switch |
| E | Clogged filter switch, fan failure switch and condensate overflow switch |
| F | Clogged filter switch, discharge air sensing and condensate overflow switch |
| G | Fan failure switch, discharge air sensing and condensate overflow switch |
| H | Clogged filter, fan failure, discharge air sensing and condensate overflow switches |
RT-PRC023AY-EN, page 26
Position 26 Ventilation / diagnostics
| 0 | None |
|---|---|
| A | Demand control ventilation (CO₂ wiring; sensor field installed) |
| B | Low-leak economizer with fault detection and diagnostics (FDD) |
| C | FDD with demand control ventilation |
RT-PRC023AY-EN, page 26
Position 27 Unit hardware
| 0 | No enhancements |
|---|---|
| 1 | Stainless steel drain pan |
RT-PRC023AY-EN, page 26
What this page doesn’t cover
- Covers the R-410A Precedent T/YSC and T/YHC nomenclature in Trane's December 2022 catalogs (design sequences E, F, G and H). Older design sequences may use different codes and will show as unknown.
- Digits 12–13 are a factory-assigned service sequence with no published code list. Enter them as they appear; the decoder cannot interpret them.
- Digits 28 and later (including digit 31, human interface, and digit 34, ultra-low NOx on 17 Plus units) are not decoded.
- Filter sizes are Trane's recommended factory throwaway filters from the general data tables. Standard and high efficiency units of the same size can take different filters. Confirm against the rack in the unit.
- Precedent heat pumps (WSC, WHC) use separate literature and are not decoded here.
- Trane's newer R-454B Precedent (TSK, YSK, THK, YHK, catalog RT-PRC115) and the 6–25 ton YSJ/YHJ units use different model numbers and are not covered by this page.
Decoded it on the roof?
Keep it with the unit.
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See BoltWright →Independent BoltWright reference, not a manufacturer service manual. Trane is named to identify the equipment; no endorsement is implied. Confirm against the unit’s nameplate and Trane’s current literature before ordering parts.
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