Wilo-Stratos MAXO-D

Smart glandless twin-head circulator with screwed connection or flange connection, EC motor with integrated electronic power adjustment.

Hot-water heating systems of all kinds, air-conditioning systems, closed cooling circuits, and industrial circulation systems.

Field of application

The pump facilitates an operation with the highest system efficiency via the precise setting of the control mode for the system-specific application (e.g. radiator, underfloor heating, ceiling cooling).

Heating

• Radiator
• Underfloor heating
• Ceiling heating
• Fan heater
• Concrete core heating*
• Hydraulic shunt
• Differential pressure-less distributor*
• Buffer heating*
• Heat exchanger
• Heat source circuit (heat pump)*
• District heating circuit*

Cooling

• Ceiling cooling
• Underfloor cooling
• Air-conditioning devices
• Concrete core cooling*
• Hydraulic shunt
• Differential pressure-less distributor*
• Buffer cooling*
• Heat exchanger
• Recooling circuit*
• District cooling circuit*

(* system types from SW≥01.05.10.00 available)

Heating and cooling combined

• Automatic switchover (version “-R7”: not possible; however, possible with Stratos MAXO temperature sensor)

The following control modes are available depending on the selected application:

Control modes

• Constant speed (control mode)
• Δp-c for constant differential pressure
• Δp-v for variable differential pressure
• Dynamic Adapt plus for continuous (dynamic) adjustment of the delivery rate to the current requirement
• T-const. for constant temperature control
• ΔT-const. for constant differential temperature control
• Constant Q for constant volume flow control
• Multi-Flow Adaptation: Total volume flow determination through the feeder pump for the needs-based supply of secondary pumps in the heating circuit distributors
• User-defined PID control

Optional functions

• Q-limit_max. for limiting the maximum volume flow
• Q-limit_min. for limiting the minimum volume flow
• No-Flow Stop (zero-flow-deactivation)
• Automatic night setback (version “-R7”: not possible; however, possible with Stratos MAXO temperature sensor)
• Index circuit evaluator (Δp-c control with external actual value sensor)
• Thermal disinfection detection (Stratos MAXO-Z)
• Variable pitch of Δp-v pump curve

Manual settings

• Selection of the field of application in the setting assistant
• Setting the related operating parameters
• Nominal duty point: direct input of calculated duty point at Δp-v
• Status display
• Setting and resetting the energy meters (heating and cooling)
• Pump venting function
• Key lock for disabling the settings
• Function for resetting the factory settings or the saved restoration points (parameter sets)
• Parameterizing the analog inputs
• Parameterizing the binary inputs
• Parameterizing the relay outputs
• Twin-head pump function (for 2 single pumps, which should be operated as a twin-head pump)

Automatic functions

• Power adjustment according to requirements for energy-efficient operation depending on the operating mode
• Detection of night setback (version “-R7”: not possible; however, possible with Stratos MAXO temperature sensor)
• Deactivation at zero flow (No-Flow Stop)
• Soft start
• Automatic troubleshooting routines (e.g. deblocking function)
• Switchover between heating/cooling mode (version “-R7”: automatic switchover not possible; however, possible with Stratos MAXO temperature sensor)
• Full motor protection with integrated trip electronics

External control inputs and their functions

2 x analog inputs:

• Signal types: 0 – 10 V, 2 – 10 V, 0 – 20 mA, 4 – 20 mA, PT1000
• Applications: Remote adjustment of the setpoints in every control mode (except Multi-Flow Adaptation), sensor inputs for temperature, differential pressure, or free sensor in user-defined PID operation

2 x digital inputs:

• For potential-free control outputs or switch
• Parameterizable functions:
  • Ext. Off
  • Ext. Min
  • Ext. Max
  • MANUAL (BMS-OFF)
  • Key lock
  • Switchover between heating/cooling mode

Wilo Net for dual pump management of 2 single pumps, communication of several pumps with each other, and pump-remote adjustment via the gateway

Signal and display functions

• Display status operation display:
  • Setpoint
  • Actual delivery head
  • Actual volume flow
  • Power consumption
  • Electric consumption
  • Temperatures (version “-R7”: current fluid temperature possible with Stratos MAXO temperature sensor)
• Status display LED: Faultless operation (green LED), pump communication (blue LED)
• Display status of display fault (display red):
  • Error codes and error description in full text
  • Remedial measures
• Display status of display warning (display yellow):
  • Warning codes and description of the warning in full text
  • Remedial measures
• Display status process indicator (display blue):
  • Pump venting
  • Update procedure
• Display BMS communication (display blue):
  • Summary of the active BMS parameters (baud rate, address…)
• Collective fault signal SSM (potential-free changeover contact)
• Collective run signal SBM (potential-free normally open contact)

Data exchange

• Bluetooth interface for wireless data exchange and remote operation of the pump using a smartphone or tablet.
• Remote monitoring of the pump via the Internet with the Wilo-Smart Gateway.
• Digital Modbus TCP interface for connection to building automation (BA) (possible with Wilo-CIF module Ethernet [multi-protocol]).
• Serial digital interface Modbus RTU for connecting building automation (BA) via RS485 bus system (possible with Wilo-CIF module Modbus RTU).
• Digital BACnet IP interfaces for connection to building automation (BA) (possible with Wilo-CIF module Ethernet).
• Serial digital interface BACnet MS/TP for connecting building automation (BA) via RS485 bus system (possible with Wilo-CIF module BACnet MS/TP).
• Serial digital interface LON for connecting building automation (BA) via bus system LONWorks (possible with Wilo-CIF module LON).
• Serial digital interface CANopen for connecting building automation (BA) via bus system CANopen (possible with Wilo-CIF module CANopen).
• Serial digital interface PLR for connecting BA via company-specific coupling module (possible with Wilo-CIF module PLR).

Dual pump management (twin-head pump or 2 x single pumps)

• Main/standby operation (automatic fault-actuated switchover/time-sensitive pump alteration)
• Parallel operation (efficiency-optimized peak load cut-in and out)

Equipment

• For flange-end pumps: Flange versions
  • Standard version for DN 32 to DN 65 pumps: PN 6/10 combination flange (PN 16 flange according to EN 1092-2) for PN 6 and PN 16 counter flanges
  • Standard version for DN 80/DN 100 pumps: PN 6 flange (designed for PN 16 according to EN 1092-2) for PN 6 counter flange
  • Special version for DN 32 to DN 100 pumps: PN 16 flange (according to EN 1092-2) for PN 16 counter flange
• Various integrated communication interfaces and optionally usable CIF module plug-in position
• 5 cable inlets for connecting the communication interfaces
• Bluetooth interface
• High-resolution graphic display with a green button and 2 additional buttons
• User-friendly terminal room
• Integrated temperature sensor (version “-R7”: without)
• Quick electrical connection with optimized Wilo-Connector for the power supply