Wilo-Stratos MAXO

Glandless smart circulator with oval flange and round flange connection and EC motor with integrated electronic power adjustment.

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

Max. Flow: 280 GPM

Max. Head: 52 feet

Field of application

The pump facilitates an operation with highest system efficiency via 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
• Heat exchanger

Cooling

• Ceiling cooling
• Underfloor cooling
• Air-conditioning devices
• Heat exchanger

Heating and cooling combined

• Automatic switchover

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 regulation
• ΔT for 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 controller

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 setback operation
• Index circuit evaluator (Δp-c control with external actual value sensor)
• Variable pitch of Δp-v pump curve

Manual settings

• Selection of the field of application using the Setup Guide
• 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)
• Parameterising the analogue inputs
• Parameterising the binary inputs
• Parameterising the relay outputs
• Dual pump function (for 2 single pumps, which should be operated as twin-head pump)

Automatic functions

• Power adjustment according to requirements for energy-efficient operation depending on the operating mode
• Setback operation
• Deactivation at zero flow (No-Flow Stop)
• Soft start
• Automatic troubleshooting routines (e.g. deblocking function)
• Switchover heating/cooling mode
• Full motor protection with integrated trip electronics

External control inputs and their functions

• 2 x analogue 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-operating mode
• 2 x digital inputs:
• For potential-free control outputs or switch
• Parametrizable 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 gateway

Signal and display functions

• Display status operation display:
  • Setpoint
  • Actual delivery head
  • Actual volume flow
  • Power consumption
  • Electric consumption
  • Temperatures
• 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.
• Serial digital interface Modbus RTU for connecting building automation (BA) via RS485 bus system (possible with Wilo-CIF module Modbus RTU).
• Serial digital interface BACnet MS/TP for connecting building automation (BA) via RS485 bus system (possible with Wilo-CIF module BACnet MS/TP).

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

• 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 green button and 2 additional buttons
• User-friendly terminal room
• Integrated temperature sensor in the pump housing
• Quick electrical connection with optimized Wilo-Connector including a ½ NPT connection adapter for the power supply

• Permissible temperature range 14 °F (-10 °C) to 230 °F (+110 °C)
• Mains connection:
  • 1~115 V, 50/60 Hz (depending on type),
  • 1~230 V-240 V, 50/60 Hz
• Enclosure: Type 2
• Flange connection: 1.25, 1.5, 2 and 3 inch
• Max. operating pressure: 145 psi
• Insulation class: F

• Pump housing: grey cast iron with cataphoretic-coated
• Thermal insulation: polypropylene
• Shaft: Stainless steel
• Bearing: carbon
• Impeller: Plastic

• Smart glandless circulator with EC motor and integrated electronic power adjustment
• Green Button Technology and graphic display
• Motor protection with trip electronics
• Plug connection for functional extension with optional CIF module for building automation (BA)
• Impeller with three-dimensionally curved blades and plastic sealing tube made of carbon fibre composite material

• Pump
• Optimized Wilo-Connector with ½ NPT connection adapter
• 5x threaded cable gland M16 x 1.5
• Gaskets for 1.25, 1.5 and 2 inch flange connections
• Installation and operating instructions

NO VALUE

• PT1000 (B) pipe surface contact sensor (for domestic hot water)
• PT1000 (AA) sensor for installation in immersion sleeve
• Differential pressure sensor
• CIF modules: Modbus RTU, BACnet MS/TP

• Permissible temperature range 14 °F (-10 °C) to 230 °F (+110 °C)
• Mains connection:
  • 1~115 V, 50/60 Hz (depending on type),
  • 1~230 V-240 V, 50/60 Hz
• Enclosure: Type 2
• Flange connection: 1.25, 1.5, 2 and 3 inch
• Max. operating pressure: 145 psi
• Insulation class: F

• Pump housing: grey cast iron with cataphoretic-coated
• Thermal insulation: polypropylene
• Shaft: Stainless steel
• Bearing: carbon
• Impeller: Plastic

• Smart glandless circulator with EC motor and integrated electronic power adjustment
• Green Button Technology and graphic display
• Motor protection with trip electronics
• Plug connection for functional extension with optional CIF module for building automation (BA)
• Impeller with three-dimensionally curved blades and plastic sealing tube made of carbon fibre composite material

• Pump
• Optimized Wilo-Connector with ½ NPT connection adapter
• 5x threaded cable gland M16 x 1.5
• Gaskets for 1.25, 1.5 and 2 inch flange connections
• Installation and operating instructions

NO VALUE

• PT1000 (B) pipe surface contact sensor (for domestic hot water)
• PT1000 (AA) sensor for installation in immersion sleeve
• Differential pressure sensor
• CIF modules: Modbus RTU, BACnet MS/TP