Features/Product Advantages

Integrated electronic power adjustment for energy savings
Optional interface available for bus communication via plug-in IF modules
Features proven "Green Button" technology and a display for simple, user-friendly operation
Integrated comprehensive motor protection with electronic trip unit (PTC thermistor sensors)
Power ratings and key dimensions comply with EN 733 standards (standardized pumps) to meet user requirements

Environmental Attributes

Highly energy-efficient, utilizing IE4 motor technology and hydraulics with MEI ≥ 0.4
Sustainable and carbon-neutral production and processes at our European facilities

Construction

Electronically controlled, glanded single-head pump with a modular design, featuring flange connections and automatic power adjustment.

Applications

Pumping of heating water (in accordance with VDI 2035), cold water, and water-glycol mixtures in heating, chilled water, and cooling systems; media must be free of abrasive substances.

Equipment/Functions

Operating modes

Δp-c (constant differential pressure)
Δp-v (variable differential pressure)
PID control
Constant speed (n = constant)

Manual operation level

Green button and display

Manual functions

Differential pressure setpoint adjustment
Speed ​​adjustment (manual control mode)
Operating mode selection
Pump ON/OFF
Configuration of all operating parameters
Fault acknowledgement

External control functions

1× "Override Off" control input
1× "External pump cycling" control input (active only in twin-head pump operation)
1× Analog input (0-10 V, 2-10 V, 0-20 mA, 4-20 mA) for constant speed (DDC) and remote setpoint adjustment
1× Analog input (0-10 V, 2-10 V, 0-20 mA, 4-20 mA) for actual value signal from pressure sensor

Reporting and display functions

Collective fault signal (SSM)
Collective run signal (SBM)

Data exchange

Infrared interface for wireless data exchange via IR stick
Slot for Wilo IF-Modules (Modbus, BACnet, CAN, PLR, LON) for connection to building automation systems
Interface for twin-head pump communication

Safety functions

Comprehensive motor protection with integrated trip electronics
Access lock

Twin-head pump management (2× single pumps, Y-piece application only)

Main/standby operation (automatic fault-based switchover)
Main/standby operation with pump cycling after 24 hours
Parallel operation
Parallel operation (peak-load cut-in/cut-out optimized for efficiency)

Type key

Technical Data

Permissible temperature range: -20 °C to +140 °C
Minimum Efficiency Index (MEI): ≥ 0.4
The mechanical seal is suitable for pumping water at temperatures up to Tmax = +140 °C. At temperatures T ≤ +40 °C, pumping of glycol mixtures with a volume content of 20% to 40% is permitted. If the glycol volume content in the water-glycol mixture exceeds 40% (up to a maximum of 50%), the medium temperature exceeds +40 °C (up to a maximum of +120 °C), or if media other than water are used, a different mechanical seal is required. When using water-glycol mixtures, the S1 variant with the corresponding mechanical seal is generally recommended. Power connection
3~440 V -5%/+10%, 50/60 Hz
3~400 V ±10%, 50/60 Hz
3~380 V -5%/+10%, 50/60 Hz
EMC compliance without additional measures:
Interference emission for residential areas: EN 61800-3:2018
Interference immunity for industrial areas: EN 61800-3:2018
Protection class IP55
Nominal diameter DN 32 to DN 150
Max. operating pressure: 16 bar up to +120 °C; 13 bar up to +140 °C

Materials

Pump housing and lantern: EN-GJL-250
Impeller
Standard version: EN-GJL-200
Special version: Bronze CuSn 10
Special version: Stainless steel 1.4408
Shaft: 1.4122
Mechanical seal: AQEGG; other mechanical seals available upon request

Type

Single-stage, low-pressure centrifugal pump in block design with axial suction port and radially arranged discharge port; featuring

Mechanical seal
Flanged connection with pressure measurement connection R 1/8
Lantern
Coupling
Drive with integrated electronic speed control

Scope of delivery

Pump
Installation and operating instructions

Options

...-R1 version without differential pressure sensor
...-L1 version with bronze impeller (surcharge)
...-L4 version with stainless steel impeller (surcharge)

Accessories

Support blocks for base installation
IR-Stick
IF-Module PLR ​​for connection to PLR/interface converter
IF-Module LON for connection to LONWORKS network
IF-Module BACnet
IF-Module Modbus
IF-Module CAN
VR-HVAC control system
CCe-HVAC control system
SCe-HVAC control system
Differential pressure sensor (DDG)