Electronically controlled glanded twin-head pump in in-line design with flange connection and automatic power adjustment

Pumping of heating water (acc. to VDI 2035), chilled water and water/glycol mixtures without abrasive substances in heating, chilled water and cooling systems.

Operating modes

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

Manual operation level

• Green button and display

Manual functions

• Differential pressure setpoint setting
• Setting the speed (manual control mode)
• Setting the operating mode
• Setting the pump ON/OFF
• Configuration of all operating parameters
• Fault acknowledgement

External control functions

• "Overriding Off" control input
• “External pump cycling” control input (effective only in dual pump operation)
• Analogue input 0 – 10 V, 0 – 20 mA for constant speed (DDC) and remote setpoint adjustment
• Analogue input 2 – 10 V, 4 – 20 mA for constant speed (DDC) and remote setpoint adjustment
• Analogue input 0 – 10 V for actual value signal from pressure sensor
• Analogue input 2 – 10 V, 0 – 20 mA, 4 – 20 mA for actual value signal from pressure sensor

Signal and display functions

• Collective fault signal SSM
• Collective run signal SBM

Data exchange

• Infrared interface for wireless data exchange with IR-Monitor/IR-Stick
• Plug-in position for Wilo IF-Modules (Modbus, BACnet, CAN, PLR, LON) for connection to building automation

Safety functions

• Full motor protection with integrated trip electronics
• Access disable

Dual pump management (double pump or 2 x single pumps)

• Main/standby operation (automatic fault-actuated switchover)
• Pump cycling main/standby operation after 24 hours
• Parallel operation
• Parallel operation (efficiency-optimised peak-load activation and deactivation)

• Typekey

  Example	DL-E 50/170-7.5/2-R1
  DL-E	In-line double pump with electronic control
  50	Nominal diameter DN of the pipe connection
  170	Nominal impeller diameter
  7.5	Rated motor power P2 in kW
  2	Number of poles
  R1	Version without pressure sensor

  Technical data

  • Permissible temperature range of -20 °C to +140 °C
  • Mains connection
    • 3~440 V ±10 %, 50/60 Hz
    • 3~400 V ±10 %, 50/60 Hz
    • 3~380 V -5 % +10 %, 50/60 Hz
  • Compliance with electromagnetic compatibility without additional measures:
    • Interference emission for residential environment according to EN 61800-3:2018
    • Interference immunity for industrial environments according to EN 61800-3:2018
  • Protection class IP55
  • Nominal diameter DN 40 to DN 200
  • 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
  • Shaft: 1.4122
  • Mechanical seal: AQEGG; other mechanical seals on request

  Construction

  Single-stage, low-pressure double pump in in-line design with

  • Switchover valve
  • Mechanical seal
  • Flange connection
  • Lantern
  • Coupling
  • Drive with integrated electronic speed control

  Scope of delivery

  • Pump
  • Installation and operating instructions

  Options

  • Variant …-R1 without differential pressure sensor
  • ...-L1 variant with bronze impeller (at additional charge)

  Accessories

  • 3 Mounting brackets with fixation material for installation on a base
  • Blind flanges for double pump housing
  • IR-Monitor, Wilo-IR-Stick
  • IF-Module PLR for connecting to PLR/interface converter
  • IF-Module LON for connection to the LONWORKS network
  • IF-Module BACnet
  • IF-Module Modbus
  • CAN IF-Module
  • VR-HVAC control system
  • Control system CCe-HVAC
  • Control system SCe-HVAC
  • Differential pressure sensor (DDG)