CronoTwin-DL-E

Design

Application

Equipment/function

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

• 1x “Overriding Off” control input
• 1x “External pump cycling” control input (effective only in twin-head pump operation)
• 1x Analogue input 0–10 V, 2–10 V, 0–20 mA, 4–20 mA for constant speed (DDC) and remote setpoint adjustment
• 1x Analogue input 0–10 V, 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-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 (twin-head 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)

Type key

Technical data

• Permissible temperature range of -20 °C to +140 °C
• Minimum efficiency index (MEI) ≥ 0.4
• Mechanical seal for pumping water up to Tmax = +140 °C. Up to T ≤ +40 °C, a glycol admixture of 20 % to 40 % by volume is permissible. An alternative mechanical seal must be provided for water-glycol mixtures with a glycol content of > 40% to max. 50% by volume and a fluid temperature of > +40 °C to max. +120 °C or other fluids that differ from water. When using water-glycol mixtures, the use of an S1 variant with a corresponding mechanical seal is generally recommended.
• 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
• IP55 rating
• 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
  • Special version: Stainless steel 1.4408
• 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

• …-R1 variant without differential pressure sensor
• …-L1 variant with bronze impeller (at additional charge)
• …-L4 variant with stainless steel impeller (at additional charge)

Accessories

• 1 Mounting bracket with fixation material for installation on a base
• Blind flanges for twin-head 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
• IF module CAN
• Control system VR-HVAC
• Control system CCe-HVAC
• Control system SCe-HVAC
• Differential pressure sensor (DDG)