DL-E

Design

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

Application

For pumping heating water (in accordance with VDI 2035), water-glycol mixtures and cooling and cold water without abrasive substances in heating, cold water and cooling water systems

Type key
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	Nominal motor power P2  in kW
2	Number of poles
R1	Version without pressure sensor

Special Features/Product Advantages

• Motors with IE2 technology for higher efficiency fitted as standard
• Energy savings due to integrated electronic control
• Simple operation with red-button technology and display
• Various operating modes: main/standby operation and parallel operation
• Configurable signal relays for run and fault signals
• Configurable fault response tailored to HVAC applications
• Access disable on the pump
• Integrated full motor protection (PTC thermistor sensor) with trip electronics
• Functions and operation identical to Wilo-VeroTwin-DP-E
• High standard of corrosion protection thanks to cataphoretic coating
• Condensate drainage holes as standard

Technical Data

• Permissible temperature range -20 °C to +140 °C
• Mains connection
• 3~400 V ±%10 , 50 Hz
• 3~380 V - %5  + %10 , 60 Hz
• Koruma sınıfı IP 55
• Nominal diameter DN 40 to DN 200
• Max. operating pressure 16 bar

Description/Design

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

Materials

• Pump housing and lantern: EN-GJL-250
• Impeller:
  • Standard version: EN-GJL-200
  • Special version: G-CuSn 10
• Shaft: 1.4122
• Mechanical seal: AQEGG; other mechanical seals on request

Equipment/Function

Operating Modes

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

MManual operation level

• Red button and display

Manual Functions

• Differential pressure setpoint setting
• Speed setting (manual control mode)
• Operating mode setting
• Pump ON/OFF setting
• Configuration of all operating parameters
• Error acknowledgement

External Control Functions

• "Overriding Off" control input
• "External pump cycling" control input (effective only in double pump operation mode)
• Analogue input 0–10 V, 0–20 mA for manual control mode (DDC) and remote setpoint adjustment
• Analogue input 2–10 V, 4–20 mA for manual control mode (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-Module/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 Pump)

• 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)

Scope of delivery

• Pump
• Installation and operating instructions

Options

• R1 version without differential pressure sensor
• L1 variant with red brass impeller (at additional charge)
• H1 variant with housing made of spheroidal cast iron (at additional charge)

Accessories

• Three mounting brackets with fixation material for installation on a base
• Blind flanges for double pump housing
• IR-Monitor, IR-Stick
• IF-Module PLR for connecting to PLR/interface converter
• IF-Module LON for connection to the LONWORKS network
• BACnet IF-Module
• Modbus IF-Module
• CAN IF-Module
• VR-HVAC control system
• Control system CCe-HVAC
• SC-HVAC control system

General notes - ErP (ecological design-) directive

• The benchmark for most efficient water pumps is MEI ≥ 0.70
• The efficiency of a pump with a trimmed impeller is usually lower than that of a pump with the full impeller diameter. The trimming of the impeller will adapt the pump to a fixed duty point, leading to reduced energy consumption. The minimum efficiency index (MEI) is based on the full impeller diameter.
• The operation of this water pump with variable duty points may be more efficient and economic when controlled, for example, by the use of a variable speed drive that matches the pump duty to the system.
• Information on benchmark efficiency is available at www.europump.org/efficiencycharts