ZunShang ZS-02
DC Inverter Gas-Fired Boiler for Space Heating & Domestic Hot Water
This product features intelligent variable-frequency combustion technology that automatically adjusts flame level according to actual heating and DHW demand—precisely matching diverse power requirements and minimizing energy waste for highly efficient, stable operation.
Powered by a DC inverter drive system, it dynamically optimizes the air-to-gas ratio in real time to ensure complete combustion—delivering measurable gas savings. Its ultra-low-noise design uses a DC inverter fan operating at only 38–45 dB, providing quiet, comfortable nighttime heating without disturbing daily rest.
Smart remote control enables "Away Mode," "Home Preheating," real-time monitoring, and safety alerts. Dual-mode heating and DHW functionality—seamless switching between modes—meets year-round household needs. With 55 layers of safety protection, Hiounce delivers an energy-efficient, comfortable, safe, and worry-free home heating experience.
Category:
Gas-Fired Condensing Combi Boiler- Intelligent Variable-Frequency Combustion Technology
Automatically adjusts flame level based on demand to precisely match varying power requirements. - DC Inverter Drive — Saves Gas & Money
Real-time adjustment of air-to-gas ratio ensures complete combustion. - Smart Remote Control
Supports “Away Mode” and “Home Preheating”; real-time monitoring and safety alerts. - 55 Layers of Safety Protection
Comprehensive safety safeguards. - Ultra-Low Noise Operation — Comfort Without Disturbance
DC inverter fan features noise-reduction design, operating at just 38–45 dB—quiet enough for undisturbed nighttime heating. - Dual-Mode Heating & Domestic Hot Water (DHW)
Supports independent space heating mode and DHW mode—easy switching to meet year-round household needs.
| Parameter | LL1PB20-BZF | LL1PB24-BZF | LL1PB28-BZF | LL1PB32-BZF |
|---|---|---|---|---|
| Gas Type (12T) | Natural Gas | Natural Gas | Natural Gas | Natural Gas |
| Rated Gas Pressure (Pa) | 2000 | 2000 | 2000 | 2000 |
| Rated Space Heating Output (kW) | 20 | 24 | 28 | 32 |
| Minimum Space Heating Output (kW) | 7 | 8.4 | 9.8 | 11.2 |
| Rated DHW Output (kW) | 20 | 24 | 28 | 32 |
| Rated Space Heating Output (80℃/60℃) (kW) | 18 | 21.6 | 25.2 | 28.8 |
| Minimum Space Heating Output (80℃/60℃) (kW) | 6 | 7.2 | 8.4 | 9.6 |
| Max System Pressure (MPa) | 0.3 | 0.3 | 0.3 | 0.3 |
| DHW System Operating Water Pressure (MPa) | 0.03–0.7 | 0.03–0.7 | 0.03–0.7 | 0.03–0.7 |
| Minimum DHW Flow Rate for Activation (L/min) | 2.7 | 2.7 | 2.7 | 2.7 |
| Hot Water Production Capacity at Δt = 25℃ (kg/min) | 10 | 12 | 14 | 16 |
| Expansion Tank Volume (L) | 6 | 6 | 6 | 6 |
| Expansion Tank Precharge Pressure (bar) | 1 | 1 | 1 | 1 |
| Radiator Temperature Adjustment Range (℃) | 30–80 | 30–80 | 30–80 | 30–80 |
| Underfloor Heating Temperature Adjustment Range (℃) | 30–60 | 30–60 | 30–60 | 30–60 |
| DHW Temperature Adjustment Range (℃) | 30–60 | 30–60 | 30–60 | 30–60 |
| Power Supply (AC) | 220V～50Hz | 220V～50Hz | 220V～50Hz | 220V～50Hz |
| Electric Shock Protection Class | Class I | Class I | Class I | Class I |
| Enclosure Protection Rating | IPX4 | IPX4 | IPX4 | IPX4 |
| Rated Electrical Power (W) | 130 | 130 | 135 | 135 |
| Heating Flow/Return Connection | G3/4 | G3/4 | G3/4 | G3/4 |
| Gas Connection | G3/4 | G3/4 | G3/4 | G3/4 |
| DHW Inlet/Outlet Connection | G1/2 | G1/2 | G1/2 | G1/2 |
| Concentric Flue Dimensions (mm) | Φ60/100 | Φ60/100 | Φ60/100 | Φ60/100 |
| Unit Dimensions (H×W×D) (mm) | 740×410×327 | 740×410×327 | 740×410×327 | 740×410×327 |
| Energy Efficiency Class | Class 2 | Class 2 | Class 2 | Class 2 |
| Thermal Efficiency (%) | ≥90 | ≥90 | ≥90 | ≥90 |
