Product specifications
WSTBY-J785-DT1ZB-I
VRF system — VRF T3 modular outdoor unit
| Model | WSTBY-J785-DT1ZB-I |
|---|---|
| Series | VRF T3 modular outdoor unit |
| Capacity (ton) | 17.3 |
| Capacity (kW) | 61 |
| QCC Registration | Registered |
| Region | UAE |
Performance
| Power supply | 380–415 V, 3N~, 50/60 Hz |
|---|---|
| Cooling capacity, T1 (kW) | 79 |
| Cooling capacity, T1 (TR) | 22.57 |
| Cooling capacity, T1 (Btu/h) | 270000 |
| Cooling capacity, T3 (kW) | 61.50 |
| Cooling capacity, T3 (TR) | 17.57 |
| Cooling capacity, T3 (Btu/h) | 210000 |
| Heating capacity (kW) | 79 |
| Heating capacity (TR) | 22.57 |
| Heating capacity (Btu/h) | 270000 |
| EER, T1 (W/W) | 3.27 |
| EER, T1 (Btu/Wh) | 11.20 |
| EER, T3 (W/W) | 2.65 |
| EER, T3 (Btu/Wh) | 9.05 |
|---|---|
| COP, T1 (W/W) | 3.8 |
| CSPF, T1 (Btu/Wh) | 13.85 |
| Rated cooling power input, T1 (kW) | 24.16 |
| Rated cooling current, T1 (A) | 38.12 |
| Rated cooling power input, T3 (kW) | 23.21 |
| Rated cooling current, T3 (A) | 36.62 |
| Rated heating power input, T1 (kW) | 20.79 |
| Rated heating current, T1 (A) | 32.8 |
| Max. input consumption (W) | 35650 |
| MCA, max. current (A) | 57 |
| MFA, circuit breaker (A) | 80 |
Compressor
| Compressor model | DC80PHDG-D1Y2 + AA55PHDG-D1Y2 |
|---|---|
| Number of compressors | 2 |
| Compressor type | DC inverter |
| Compressor brand | Hitachi |
| Compressor speed range (rps) | 10–130 / 15–140 |
| Compressor capacity (W) | 26400 / 26630 |
| Compressor input (W) | 8130 / 8700 |
| Operating frequency (Hz) | 30–390 / 45–420 |
|---|---|
| Crankcase heater (W) | 40–80 |
| Compressor oil (ml) | 1100 (FV68H) |
| Additional refrigerant oil, factory (ml) | 6000 |
| Refrigerant | R410A |
| Refrigerant charge (g) | 20000 |
| Design pressure (MPa) | 4.2 |
Fans and coil
| Outdoor fan material | Plastic |
|---|---|
| Outdoor fan type | Axial |
| Outdoor fan quantity | 2 |
| Fan motor model | DW1000A-ZL |
| Fan motor type | DC inverter |
| Fan motor brand | SHANGQI |
| Insulation class | B |
| Protection class | IP54 |
| Fan motor output (W) | 1000 × 2 |
| Fan speed by setting, high → low (rpm) | 930 |
|---|---|
| Air flow (m³/h) | 30000 |
| Air flow (CFM) | 17647 |
| Noise level (dB(A)) | 45–64 |
| Coil rows | 3 |
| Fin pitch (mm) | 1.5 |
| Fin material | Hydrophilic aluminium fin |
| Tube outside Ø (mm) and type | Ø 7, inner grooved |
| Coil circuits | 30 × 3 × 2 |
Dimensions, pipes and wiring
| Net dimensions (W × D × H, mm) | 1850 × 825 × 1760 |
|---|---|
| Packing dimensions (W × D × H, mm) | 1925 × 930 × 1930 |
| Net weight (kg) | 419 |
| Gross weight (kg) | 442 |
| Refrigerant pipe, liquid side, Ø (mm) | 22.2 |
| Refrigerant pipe, gas side, Ø (mm) | 35 |
| Max. pipe length (m) | 1000 |
|---|---|
| Ambient temperature, cooling / heating (°C) | -10–55 / -20–24 |
| Power wiring, outdoor (mm²) | 5 × 25 |
| A/B signal wiring, outdoor (mm²) | 2 × 0.75 |
| A/B signal wiring, to indoor (mm²) | 2 × 0.75 |
Product features
High EER and COP
Efficient in both cooling and heating across the T1 and T3 conditions.
180° sine wave control
Full sine-wave inverter drive for the compressor — smoother, quieter, more efficient.
High-efficiency DC fan motor
DC inverter fan motors on the outdoor unit, speed-matched to the load.