Circulator pump Termojet AUTO energy-saving APM 32/10/180 mm

Termojet AUTO APM 32/10/180 mm circulation pump — a powerful energy-saving pump with an ECM permanent-magnet motor and wet rotor for large heating systems and boiler rooms. Installation length 180 mm, threaded connection 1¼″ BSP (internal thread of union nut), power consumption 5–120 W, maximum head 10 m, flow rate up to 9 m³/h. The pump automatically adapts its speed to the current system load.

Technical Specifications

AUTO Operating Modes

Constant differential pressure (Δp-c). The pump maintains a set pressure difference between the supply and return pipelines at a constant level. Δp-c mode is indispensable for large radiator systems and boiler circuits with variable load: even when most valves are closed, the system pressure remains stable.

Proportional differential pressure (Δp-v). The differential pressure decreases proportionally with the flow rate. As the load decreases, the pump reduces its speed and pressure — lower noise, lower consumption. Δp-v mode is recommended for mixed systems and for pump groups with a mixer.

Applications

• Boiler room of a private house or small commercial facility — the main pump of the primary circuit from the boiler to the distribution manifold.
• Solid-fuel boiler with a buffer tank — large flow variation, requiring both high flow rate and sufficient head.
• Pump group NG-51.150 (180 mm) — APM 32/10 is the standard pump for this group.
• Pump group NG-52.150 (180 mm) — compatible in installation dimensions.
• Replacement of an old 1¼″ 180 mm pump without modifying the pipework.
• System with a heat pump and a large circuit: Termojet heat pumps.

Why ECM Is Better Than 3-Speed

At peak parameters, the APM 32/10 consumes up to 120 W — but only at moments of maximum load. Most of the time the heating system operates at partial load, and the ECM motor responds automatically by reducing speed and consumption. An old asynchronous pump under the same conditions would draw 80–120 W continuously at any speed setting. The wet rotor eliminates shaft seals and maintenance requirements.

APM 32/10 and Heat Pump Systems

A large heat pump serving several zones requires a pump with a flow rate of 6–8 m³/h. The APM 32/10 covers these needs, and Δp-v mode synchronises the pump operation with the variable output of the heat pump. The full catalogue of heat pump solutions is at tjheatpump.com.ua.

Frequently Asked Questions

What is the difference between APM 25/8 and APM 32/10?
The APM 32/10 has a greater maximum head (10 m vs. 8 m) and higher flow rate (9 m³/h vs. 8 m³/h), as well as a higher maximum power consumption (120 W vs. 80 W). Both models have an installation length of 180 mm and a 1¼″ BSP connection — replacement requires no pipework modifications.

Is the APM 32/10 compatible with the NG-51 pump group?
Yes, fully compatible. Also browse the Termojet pump group catalogue to select the optimal assembly.