This manual provides installation requirements, safety precautions, and operating instructions for the A.O. Smith JSQ16‑B1A, JSQ16‑B1AX, JSQ20‑B1A and JSQ20‑B1AX domestic gas water heaters. It emphasizes proper ventilation, grounding, and compliance with national standards.
Key features include a forced‑exhaust system, seasonal mode switching, multiple protection devices (CO detection, over‑pressure, dry‑burn, freeze protection), and automatic fault diagnosis with audible alarms. This manual is written in Chinese.
| Model | JSQ16‑B1A/JSQ16‑B1AX/JSQ20‑B1A/JSQ20‑B1AX |
|---|---|
| Gas type | Natural gas |
| Rated gas pressure | 2000 Pa |
| Rated heat water capacity | 16 kg/min (JSQ16) / 20 kg/min (JSQ20) at 25 °C |
| Rated thermal output | 16 kW (JSQ16) / 20 kW (JSQ20) |
| Ignition method | Electronic pulse automatic ignition |
| Minimum start water pressure | 0.01 MPa |
| Applicable water pressure range | 0.02 – 0.8 MPa |
| Power supply | 220 V / 50 Hz |
| Rated electric power (standby) | 60 W (standby 2.4 W) |
| Freeze‑prevention heater power | 126 W (JSQ16/20‑B1AX models) |
| Inlet water connection size | R1/2" |
| Gas inlet size | G3/4" |
| Dimensions (H×W×D) | 515.5 mm × 325 mm × 131 mm |
| Gas pipe length | 915 mm |
| Hot water pipe length | 815 mm |
| Net weight | 13.5 kg |
The heater can start when the water pressure exceeds 0.01 MPa.
The JSQ16/20‑B1AX models have a freeze‑prevention heater that automatically keeps the unit powered to prevent ice formation.