Sanhua SD-14 Microchannel Heat Exchanger (Condenser) | 780 × 754.2 mm | 5.8-16.3 kW (R410A) | 45 bar

The Sanhua SD-14 is a 100% aluminum microchannel condenser coil from the Sanhua MCHE standard series. It is a 780 × 754.2 mm single-slab (1 bank), 2-pass design, 16 mm deep with 79 flat tubes. Depending on air velocity, it provides 5.8 - 16.3 kW (19,812 - 55,476 BTU/h) heat rejection with R410A. The all-aluminum (AA3003) body eliminates galvanic corrosion, while the inlet/outlet tubes are copper for ease of brazing.

Aluminum Microchannel Condenser Coil

The SD-14 is a single-slab microchannel condenser consisting of fins + flat tubes + end headers. The header diameter is 2 × Ø20 mm, fin density 23 FPI and fin height 8.1 mm. Refrigerant distribution is split into 2 passes as 42/37 (inlet/outlet). The maximum working pressure is 45 bar (4.5 MPa) and the burst pressure 135 bar (13.5 MPa), and its internal volume is only 0.733 liters — requiring far less refrigerant charge than a conventional tube-and-fin condenser. This lowers both refrigerant cost and the CO₂ equivalent under F-Gas regulations.

Technical Specifications (Official Sanhua DS-SD14-EN-R0914)

• Brand / Model: Sanhua / SD-14 · type designation 16-FPI23-2G
• Type: Microchannel condenser coil (MCHE), single slab
• Size: Length (L) 780 mm · Height (H) 754.2 mm · Depth / fin width 16 mm
• Header: 2 × Ø20 mm · Fin: 23 FPI, fin height 8.1 mm
• Tubes: 79 flat tubes (16 × 1.3 × 16) · 1 bank · 2 passes · distribution 42/37
• Connection: Inlet OD Ø9.52 mm · Outlet OD Ø8 mm — copper tubes
• Pressure: Max. working 45 bar (4.5 MPa) · Burst 135 bar (13.5 MPa)
• Internal volume: 0.733 liters
• Material: Tubes long-life aluminum alloy · Fins / headers / "C" retaining bar Aluminum AA3003 · Inlet-outlet tubes copper
• Compatible refrigerants: R410A · R404A · R22 · R134a (published capacity data) · the series is also compatible with R407C / R507

Heat Rejection Capacity (air velocity 1.0 - 4.5 m/s)

Official Sanhua test conditions: condensing 46 °C, subcooling 6.7 °C, inlet gas temperature 76 °C, air inlet 35 °C, relative humidity 39.28%.

• R410A: 5.81 - 16.25 kW (19,812 - 55,476 BTU/h)
• R22: 5.61 - 15.68 kW (19,161 - 53,520 BTU/h)
• R404A: 5.65 - 15.63 kW (19,292 - 53,326 BTU/h)
• R134a: 5.65 - 15.28 kW (19,276 - 52,153 BTU/h)

The air-side pressure drop over the same range is 13.5 - 106.4 Pa — add this value to your static pressure budget when selecting the fan.

Technician Tips

• Connections are copper: Since the inlet/outlet tubes are copper, they are brazed to the field piping in the normal way — no aluminum brazing is needed. However, the coil body is aluminum; a hole/crack in the body requires special aluminum welding and is often not economical.
• Capacity depends heavily on air velocity: it rises from ~5.8 kW at 1.0 m/s to ~16.3 kW at 4.5 m/s. Select your fan airflow according to your capacity target — with microchannel coils, fan selection is as decisive as coil selection.
• Charge amount: since the internal volume is only 0.733 L, the system charge drops significantly compared with a conventional condenser. Do not charge according to the old coil; recalculate the charge.
• Installation: as a condenser, mount it vertically (or inclined at least 15° from horizontal), positioned with the inlet connection at the top.
• Cleaning: clean the fin surface regularly along the fin direction with low-pressure air/water; high pressure flattens the fins and permanently reduces capacity.
• During transport and installation, take care to avoid knocking or crushing the flat tubes — microchannel tubes are thin-walled.
• Larger sizes in the same series: SD-17 (1324 × 622.6 mm, 4.7-32.3 kW) and SD-38 (2293 × 1008 mm, 50-145 kW).