Description
ALPHA 26 is a high-efficiency, variable speed, wet-rotor circulator fitted with an electronically commutated permanent magnet motor (ECM). Engineered for hydronic HVAC systems in large residential and light commercial buildings and supports many applications, including space heating, indirect domestic hot water (DHW), snow melting, and space cooling. Compatible with gas— and oil-fired boilers as a primary pump, with options for external control via 0–10 V DC voltage or pulse width modulation (PWM) signals. Suitable for cold water ground loops in geothermal heat pump applications, the pump is designed to operate in condensing environments where liquid temperature falls below the surrounding ambient temperature and is compatible with a 50/50 water/glycol mixture.
Delivering the best energy efficiency rating in its class, the pump offers multiple control modes, constant pressure, proportional pressure, and constant flow, that optimize operation in variable flow systems, reducing energy consumption by up to 80 % compared to equivalent permanent split capacitor (PSC) circulators.
Features
- Compact design to fit tight spaces
- Replaces multiple circulators within the same class
- Multiple control modes (constant curve; constant or proportional pressure with AUTOADAPT)
- Easy pump head rotation (via four screws)
- Integrated nut-capture in flange connection
- Check valve included
- Front-facing electrical connection for easy access
- Suitable for condensing environments
- External input 0–10V/PWM (only on the 26-99 and 26-150)
- Dry-running protection
- Warning and alarm indication
- Serviceable design (control box and pump head as separate spare parts, only for the 26-99 and 26-150)
- Additional thinner gaskets included (only on the 26-99 and 26-150)
- Display showing real-time parameters (GPM, ft, W, operation status and error codes)
