The Stiebel Eltron Outdoor Sensor (Part No. 335033) is an OEM replacement external temperature sensor designed specifically for Stiebel Eltron WPE-series ground-source / geothermal heat pumps.

Technical Specifications & Details

• Part Number: 335033
  

• Enclosure: Weatherproof plastic housing designed for external surface mounting (typically IP54 rated).

• Function: Measures outdoor ambient temperature and transmits real-time readings back to the heat pump's controller (such as the WPM / BM module) to adjust heating curves, weather-compensated flow temperatures, and system modulation.

Compatibility

• Primary Application: Specifically calibrated for Stiebel Eltron WPE series heat pumps (e.g., WPE-I / WPE inverter and commercial geothermal units).

• Control System: Integrates directly into the central Heat Pump Manager (WPM) or internal Bus Module (BM) card inputs.

Installation & Placement Guidelines

1. Location: Mount on an exterior wall facing North or North-West to prevent direct sunlight exposure from distorting temperature readings.

2. Height: Position approximately 1.5 m to 2.0 m (5 to 6.5 ft) above ground level, clear of windows, doors, air vents, or direct heat sources.

3. Wiring: Connect via a 2-core low-voltage signal cable to the dedicated outdoor sensor terminals on the main control board/bus module.