Salus NPC2 Dual Pump Controller | Heating & Domestic Hot Water
Description
Salus NPC2 Dual Controller for Heating and Domestic Hot Water (DHW) Pumps
The Salus NPC2 is an advanced electronic automation device designed to independently and simultaneously control two circulation pumps: one for the central heating system and one for supplying a domestic hot water (DHW) cylinder. Ideal for systems powered by solid fuel boilers (wood, coal, or pellets), this controller optimizes electrical consumption while ensuring ideal thermal comfort.
Operating Modes & DHW Priority
The controller allows individual temperature settings for both circuits, offering maximum operational flexibility:
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Dual Control (Heating + DHW): Activates the heating pump when the boiler reaches the set temperature threshold and triggers the DHW pump whenever the storage cylinder temperature drops.
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DHW Priority Mode: Grants heating priority to the hot water cylinder. While the storage tank is actively heating, the main house heating pump can be temporarily paused to direct maximum thermal energy to domestic hot water production.
Advanced Protection System
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Anti-Stop Function: Automatically runs both pumps for 15 seconds every 14 days during off-season periods, preventing rotor seizing and limescale buildup.
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Anti-Freeze Protection: If either temperature sensor detects readings below 5°C, the circulation pump engages automatically to prevent pipework freeze damage.
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Overheat Acoustic Alarm: Emits an audible warning signal if the boiler temperature exceeds 90°C, helping prevent system overheating damage.
Technical Specifications
| Parameter | Specification |
| Power Supply | 230V AC / 50Hz ±10% |
| Standby Power Consumption | 2 W |
| Max Output Load | 6 A per pump channel (Heating / DHW) |
| Heating Temperature Control Range | 5°C – 80°C |
| DHW Temperature Control Range | 20°C – 80°C |
| DHW Cylinder Hysteresis | Adjustable (5°C – 30°C) |
| Sensor Measurement Range | -10°C – 120°C |
| Included Sensors | 2 NTC temperature sensors (1.2 m / 3 m cables) |
| Dimensions | 155 x 70 x 39 mm |
Core Benefits
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Increased Efficiency: Eliminates redundant pump operation when thermal demand is low or when the boiler is cool.
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Two Sensors Included: Fast installation for both boiler flow and DHW cylinder thermowell.
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Clear Interface & LED Display: Easy viewing of system status and individual temperature parameters for both circuits.
