Centrifugal pump Stratos MAXO-Z series

for potable waterwith brushless DC motorstationary

Summary
The smart high-efficiency pump for domestic hot water circulation in large buildings with building management system. The Wilo-Stratos MAXO-Z has specifically been developed for drinking water applications and combines the innovative characteristics of the Wilo-Stratos MAXO with a stainless steel housing. The durable and hygienic material sets it apart from other domestic hot water circulators on the market.

Key features

• Intuitive operation by application-guided settings with the setting assistant plus a new display and control knob using Green Button Technology.
• Highest standard of drinking water hygiene and energy efficiency with the intelligent T-const. control function.
• Optimal hygiene ensured through thermal disinfection detection.
• Latest communication interfaces (e.g. Bluetooth) for connection to mobile devices and direct pump networking for multi-pump control via Wilo Net.
• Clearly arranged and spacious terminal box and optimized Wilo-Connector for convenient electrical installation.

Product variants (selection)
Stratos MAXO-Z 1.25x3-25 145PSI 1~115/230 | Pump connection: 1.25" | Mains: 1~115, 230-240 V, 50/60 Hz | Gross weight approx.: 0.48 lb | Pieces per pallet: 8 | Max. operating pressure: 145 psi | Article number: 2164623
Stratos MAXO-Z 1.25x3-35 145PSI 1~115/230 | Pump connection: 1.25" | Mains: 1~115, 230-240 V, 50/60 Hz | Gross weight approx.: 0.72 lb | Pieces per pallet: 8 | Max. operating pressure: 145 psi | Article number: 2164624
Stratos MAXO-Z 3x3-40 145PSI | Pump connection: 3" ANSI Class 125 | Mains: 1~230-240 V, 50/60 Hz | Gross weight approx.: 1.41 lb | Pieces per pallet: 8 | Max. operating pressure: 145 psi | Article number: 2164626
Stratos-MAXO Z 2x3-35 145PSI | Pump connection: 2.00" | Mains: 1~230-240 V, 50/60 Hz | Gross weight approx.: 0.85 lb | Pieces per pallet: 8 | Max. operating pressure: 145 psi | Article number: 2164625

Design
Smart glandless circulator with oval flange and round flange connection and EC motor with integrated electronic power adjustment.

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

Equipment / function

• Integrated EC motor with electronic power adjustment.
• Green Button Technology with high-resolution graphic display and additional buttons.
• Integrated temperature sensor in the pump housing.
• Quick electrical connection with optimized Wilo-Connector including ½ NPT connection adapter for power supply.
• Plug position for optional CIF modules (Modbus RTU, BACnet MS/TP).

Field of application
Facilitates operation with highest system efficiency via precise setting of the control mode for system-specific applications.

Heating (examples)

• Radiator
• Underfloor heating
• Ceiling heating
• Fan heater
• Hydraulic shunt
• Heat exchanger

Cooling (examples)

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

Heating and cooling combined

• Automatic switchover

Control modes

• Constant speed
• Δp-c (constant differential pressure)
• Δp-v (variable differential pressure)
• Dynamic Adapt plus (continuous dynamic adjustment of delivery rate)
• T-const. (constant temperature regulation)
• ΔT (differential temperature control)
• Constant Q (constant volume flow control)
• Multi-Flow Adaptation (total volume flow determination through feeder pump)
• User-defined PID controller

Optional functions

• Q-limitmax (limiting maximum volume flow)
• Q-limitmin (limiting minimum volume flow)
• No-Flow Stop (zero-flow deactivation)
• Automatic setback operation
• Index circuit evaluator (Δp-c control with external actual value sensor)
• Thermal disinfection detection
• Variable pitch of Δp-v pump curve

Manual settings

• Selection of field of application using Setup Guide and setting related operating parameters
• Direct input of nominal duty point at Δp-v
• Status display, energy meter setting/reset (heating and cooling)
• Pump venting function
• Key lock for disabling settings
• Reset factory settings or saved restoration points
• Parameterising analogue and digital inputs and relay outputs

Automatic functions

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

External control inputs and functions

• 2 × analogue inputs: signal types 0–10 V, 2–10 V, 0–20 mA, 4–20 mA, PT1000 (for remote adjustment of setpoints and sensor inputs)
• 2 × digital inputs: potential-free control inputs with parametrizable functions (Ext. Off, Ext. Min, Ext. Max, MANUAL (BMS-OFF), Key lock, Switchover heating/cooling)

Signal and display functions

• Display of setpoint, actual delivery head, actual volume flow, power consumption, electric consumption, temperatures
• Status display LED: green (faultless), blue (pump communication), yellow (warning), red (display fault)
• Error and warning codes with full-text description and remedial measures
• Process indicator display for pump venting and update procedures
• Collective fault signal SSM (potential-free changeover contact) and collective run signal SBM (potential-free normally open contact)

Data exchange

• Bluetooth interface for wireless data exchange and remote operation via smartphone/tablet
• Serial digital interfaces via optional CIF modules: Modbus RTU (RS485) and BACnet MS/TP (RS485)

Equipment (summary)

• Integrated communication interfaces and optional CIF module plug-in position
• 5 cable inlets for communication interfaces
• High-resolution graphic display with green button and 2 additional buttons
• User-friendly terminal room
• Integrated temperature sensor
• Optimized Wilo-Connector with ½ NPT adapter

Type key / Naming
Example: Wilo-Stratos MAXO-Z 3x3-40 — Stratos MAXO = high-efficiency pump, -Z = single pump for domestic hot water circulation systems; first number = flange connection in inches; second number (e.g. 3-40) = continuously adjustable setpoint height (eg. 3–40 ft).

Technical data (highlights)

• Permissible temperature range (drinking water up to 3.57 mmol/l): 32 °F (0 °C) to 176 °F (+80 °C)
• Heating water: 14 °F (-10 °C) to 230 °F (+110 °C)
• Mains connection: 1~115 V, 50/60 Hz (depending on type) or 1~230–240 V, 50/60 Hz
• Enclosure: Type 2
• Flange connection sizes: 1.25, 2 and 3 inch
• Maximum operating pressure: 145 psi
• Insulation class: F
• Emitted interference / interference resistance in accordance with EN 61800-3 standards

Materials

• Pump housing: stainless steel
• Thermal insulation: polypropylene
• Impeller: plastic
• Shaft: stainless steel
• Bearing: carbon

Construction

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

Scope of delivery

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

Accessories

• PT 1000 (B) pipe contact sensor (for domestic hot water)
• PT 1000 (AA) sensor for installation in immersion well
• Differential pressure sensor
• Wilo CIF modules: Modbus RTU, BACnet MS/TP

Caractéristiques / spécifications techniques

• Model series: Stratos MAXO-Z
• Housing: stainless steel (hygienic, durable)
• Control: multiple modes incl. Δp-c, Δp-v, T-const., ΔT, Constant Q, Dynamic Adapt plus, PID
• Communication: Bluetooth; optional Modbus RTU and BACnet MS/TP via CIF modules
• Electrical connection: optimized Wilo-Connector with ½ NPT adapter; various mains variants (115 V or 230–240 V)
• Max. operating pressure: 145 psi
• Flange sizes: 1.25", 2", 3" (ANSI Class 125 for 3")
• Permissible fluid temperatures for drinking water: 0 °C to +80 °C
• Insulation class: F; Enclosure: Type 2
• Materials: pump housing stainless steel; impeller plastic; shaft stainless steel; bearing carbon