BL-E50/250-5,5/4-R1

Single-stage glanded centrifugal pump in monobloc design for an installation on a base with integrated frequency converter for an electronic control for constant or variable differential pressure (Δp-c/Δp-v). The CronoBloc BL-E has been predominantly designed for pumping heating water (acc. to VDI 2035), cold water and water/glycol mixtures without abrasive substances in heating, air-conditioning and cooling systems.

Design

• Single-stage low-pressure centrifugal pump
• Spiral housing in monobloc design with flange and housing dimensions according to DIN EN 733, flanges PN 16 — according to EN 1092-2
• Low-oscillation and low-noise monobloc design with lantern, foot on pump housing and rigidly connected standard motor
• All grey cast iron components with cataphoretic coating as standard
• Direction-of-rotation-independent bellows mechanical seal with forced flushing and cavitation-reducing impeller.
• Mechanical seal for pumping water up to Tmax = +140 °C. A glycol admixture of 20% to 40% by volume is permissible up to T <= +40 °C. An alternative mechanical seal must be provided in water-glycol mixtures with glycol proportions > 40 % up to max. 50 % by volume and a fluid temperature of > +40 °C up to max. +120 °C or fluids other than water. When using water-glycol mixtures, the use of an S1 variant with a corresponding mechanical seal is generally recommended.

Standard equipment

Pump display for indication of:

• Control mode Δp-c (constant differential pressure), Δp-v (variable differential pressure), PID controller, n-constant (constant speed)
• Setpoint (e.g. differential pressure or speed)
• Error and warning messages
• Actual values (e.g. power consumption, actual value of the sensor)
• Operating data (e.g. operating hours, energy consumption)
• Status data (e.g. status of SSM and SBM relay)
• Device data (e.g. pump name)
• Operating mode (for Y-piece installation only: main/standby operation, parallel operation)

One-button manual operation level for:

• Pump On/Off
• Setpoint and speed adjustment
• Selecting the operation and control mode
• Configuration of operating parameters
• Fault acknowledgement

Additional functions

• Interfaces: Control input «Overriding Off», analogue input 0-10 V, 2-10 V, 0-20 mA, 4-20 mA for constant speed (DDC) or for remote setpoint adjustment, IR interface for wireless communication with operating and service unit Wilo-IR-Monitor/IR-Stick, plug-in slot for Wilo IF modules for connecting to building automation, configurable, potential-free fault and run signal
• Three-phase AC motor with frequency converter
• Integrated dual pump management
• Integrated full motor protection (PTC thermistor sensor) with trip electronics
• Standard condensate drainage holes in the motor housing (closed upon delivery)
• Different operating modes for heating (HV) or air-conditioning (AC) applications
• Access disable on the pump
• Different operation levels: Standard/Service

Accessories

• Supporting blocks for fixing to the base
• IR-Monitor
• IR-Stick
• IF module PLR
• IF module LON
• IF module Modbus
• IF module BACnet
• IF module CAN
• Control systems VR-HVAC/CCe-HVAC/SCe-HVAC
• Differential pressure sensor (DDG) sets 0-10 V for pumps in version ...-R1