THERMO 2000 TURBOMAX 65

Questions and Answers

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Caitlin VargasAug 17, 2025
Why is the water at the faucet too hot with my THERMO 2000 TURBOMAX 65 Water Heater?
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  Alexander JenkinsAug 17, 2025
  If the water at the faucet is too hot when using your THERMO 2000 Water Heater, it could be due to several reasons: * The thermostatic mixing valve temperature setting may be too high. Lower the temperature setting of the mixing valve. * The TURBOMAX® aquastat temperature setting might be too high. Lower the temperature setting of the aquastat or reduce the boiler temperature. * The system plumbing could be improperly installed. Compare the plumbing to the installation guide. * The system wiring might be incorrect. Compare the wiring to the installation guide.
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Aaron BarrAug 21, 2025
How to fix water hammer noise in THERMO 2000 TURBOMAX 65?
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  qtaylorAug 21, 2025
  If you're experiencing water hammer noise with your THERMO 2000 Water Heater, consider the following potential causes and solutions: * High velocity or flow rate of hot water use. Install a water hammer absorber, reduce water supply pressure, check the water pressure regulator, and use slower closing valves. * Expansion tank issues for potable water or the heating loop, such as a locked expansion tank due to high system pressure. Check the inlet pressure reducing valve setting and reset if the reduced pressure setting is too high. Drain the expansion tank and refill it with air. If the bladder is broken, replace the expansion tank. * High velocity affecting the zone valves. Install valves designed to better handle these circumstances.
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Heather GonzalesAug 25, 2025
Why is my THERMO 2000 TURBOMAX 65 producing insufficiently hot water?
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  malloryyoderAug 26, 2025
  If you're experiencing insufficiently hot water or a lack of hot water at the faucet with your THERMO 2000 Water Heater, here are some potential causes and solutions: * The TURBOMAX® temperature setting may be too low. Increase the TURBOMAX® temperature control (aquastat) to a higher setting. * Peak hot water usage might exceed the boiler output capacity or TURBOMAX® storage. Determine peak usage and compare it to the boiler recovery capacity and tank volume. * Scale build-up could be present in the thermostatic mixing valve or TURBOMAX®. Clean as described in the Maintenance section. * The TURBOMAX® temperature control may be faulty. Replace the temperature controller (aquastat).
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teresa31Aug 28, 2025
Why is my THERMO 2000 TURBOMAX 65 Water Heater boiler over-cycling?
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  Alyssa WileyAug 28, 2025
  If your THERMO 2000 Water Heater is experiencing boiler over-cycling during the summer or the boiler runs for longer periods, consider these possible causes: * The boiler hi-limit may be set too low. Increase the boiler hi-limit. * The boiler controller or aquastat might be faulty. Replace the faulty controller. * There might be Turbomax scale build-up. Clean the coil as described in the Maintenance section.
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Maria StewartSep 1, 2025
How to stop water noise in THERMO 2000 TURBOMAX 65 hydronic system?
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  wdunnSep 1, 2025
  If you're hearing water noise in your THERMO 2000 Water Heater hydronic system, here are a couple of things to check: * Air might be trapped in the hydronic system. Purge the air from the boiler, the TURBOMAX®, and the radiator. If the problem persists, call for service. * The differential pressure across the valve could be too high. Check if the pump or the valves are properly sized.
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Jacob VelazquezSep 5, 2025
What to do if THERMO 2000 Water Heater drips from the pressure relief valve?
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  Emily CoxSep 5, 2025
  If water is dripping from the pressure safety relief valve during each boiler cycle of your THERMO 2000 Water Heater, it indicates that the expansion tank is unable to store the required volume of boiler water during maximum design operating temperatures without exceeding the maximum allowable operating pressure. Check the expansion tank sizing. Drain the expansion tank and refill it with air. If the bladder is broken in the expansion tank, replace the expansion tank.
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pamela02Sep 9, 2025
How to increase domestic hot water in THERMO 2000 TURBOMAX 65?
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  john06Sep 9, 2025
  If you have insufficient domestic hot water from your THERMO 2000 Water Heater (when the boiler supplies both space heating and hot water), it might be that the system cannot prioritize boiler water for domestic water use. To resolve this, install a pump or a valve-zoning panel with the domestic hot water priority feature. When there's a demand for domestic hot water, the zoning panel will turn off the space heating system and direct all its energy into producing DHW.
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donaldmorrisonNov 12, 2025
What to do if there is no hot water at the faucet in THERMO 2000 TURBOMAX 65 Water Heater?
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  Trevor MooreNov 12, 2025
  If there is no hot water at the faucet when using your THERMO 2000 Water Heater, several issues could be the cause: * The boiler might not be operating. Try pressing the reset button, checking the main cut-off switch, and inspecting the fuse. If these steps don't resolve the issue, call for boiler service. * The circulator could be malfunctioning. Verify the power supply, check the shaft coupling, and ensure the impeller isn't locked. * The TURBOMAX® settings or calibration might be incorrect. Try setting the TURBOMAX® temperature to a higher setting. If the issue persists, contact boiler service. * There could be electrical problems such as faulty relays, wiring, or a blown fuse. Check the fuses and replace any that are blown. Reset the circuit breaker and verify the power supply...

Summary

Introduction and Safety Precautions

Importance of Reading Instructions

Emphasizes the necessity for all users to read and understand the manual for proper installation, operation, and safety.

Product Specifications

Technical Specifications Table

Details model, tank volume, heat transfer area, utility connection, boiler connection, dimensions, and shipping weight.

General Safety Precautions

Hot Water Temperature Hazards

Warns about severe burns and death from hot water over 125°F and highlights risks for children, elderly, and disabled.

Safe Water Temperature Guidelines

Provides a chart correlating water temperature with time to produce serious burns, aiding in setting safe temperatures.

Installation Guidelines and Decisions

Local Installation Regulations

Mandates adherence to local, state, provincial, and national plumbing and electrical codes.

Decisions Required Before Installation

Covers pressure relief valve settings, boiler output sizing, and system zoning options for heating and hot water.

Installation Clearances and Special Considerations

Installation Clearances and Leakage Precautions

Details required clearances from combustible construction and cautions about potential damage from leaks, recommending drain pans.

Special Installation Environments

Addresses requirements for restaurants (elevation) and locations with corrosive atmospheres, noting warranty implications.

Installation Procedures and Connections

Domestic Water Connections

Guides on connecting hot and cold water inlets/outlets, use of unions, and dielectric unions.

Expansion Tank for Potable Water

Explains the necessity of an expansion tank in closed systems with check valves or backflow preventers to manage thermal expansion.

Piping Schematics and Requirements

Zone Valve Zoning Schematic

Illustrates a basic piping setup for zone valve zoning with a circulator, boiler, and thermostatic mixing valve.

Piping Installation Requirements

Outlines essential requirements for installation, including code compliance and safety valve placement.

Radiant Floor System Piping

Turbomax as Buffer Tank Schematic

Presents a piping schematic showing the Turbomax unit used as a buffer tank in a radiant floor heating system.

Multi-Unit Piping Schematics

Two Water Heater Piping Schematic

Details a basic piping schematic for connecting two Turbomax water heaters, including a recirculation loop.

Thermal Mass System Piping

Turbomax with Thermal Mass Tank Schematic

Illustrates a piping configuration for a system using one Turbomax with a thermal mass storage tank for light commercial applications.

System Components and Zoning

Temperature & Pressure Relief Valve Installation

Details the installation requirements for the T&P relief valve, including pressure rating and discharge piping.

Boiler Water Connections and Zoning

Explains boiler water connections, recommendations for circulator and zone valve placement, and pressure drop considerations.

Pump and Pipe Sizing Calculations

Boiler Water Temperature Drop (TD)

Explains the concept of temperature drop through the water heater and provides methods for calculation.

Pump Flow Rate Calculation

Provides the formula and an example for calculating the required pump flow rate based on boiler output and temperature drop.

Pipe Sizing Criteria and Friction Loss

Pipe Sizing and Velocity Limits

Discusses factors influencing pipe size selection, including friction losses, pump economy, and water velocity limits.

Understanding Pressure Loss

Defines "foot of water" and explains how pressure loss from friction is calculated in pipes.

Pressure Loss Calculations and Pump Selection

Friction Loss in Fittings, Valves, and Tank

Details how to calculate pressure loss through fittings, valves, and the TURBOMAX tank using equivalent lengths and tables.

Piping System Pressure Drop and Pump Selection

Guides on calculating total system pressure drop and selecting an appropriate pump based on performance curves.

Piping System Pressurization and Expansion Tank Sizing

Piping System Pressurization Objectives

Explains the goals of system pressure control, including pressure limiting, air venting, and preventing cavitation.

Expansion Tank Sizing Methodology

Outlines the steps to determine the correct expansion tank size based on system volume, pressures, temperatures, and piping materials.

Wiring and Temperature Control

Electrical Wiring Requirements

Covers adherence to electrical codes, grounding, wire gauge, and recommended separate service switches.

Temperature Control (Aquastat)

Describes the aquastat's differential and temperature adjustment settings for controlling the water heater.

Wiring Schematics for System Configurations

Separate Circulator Wiring

Illustrates wiring diagrams for separate circulators, including 120 VAC and 24 VAC configurations.

Zone Valve Wiring Diagrams

Provides wiring schematics for 3-wire and 4-wire zone valves, covering both low voltage and line voltage applications.

Circulator Zoning with Domestic Priority

Wiring for Priority Circulator Zoning

Details the wiring for a system prioritizing domestic hot water demand using relays and thermostats for multiple zones.

Gas Boiler Circulator Zoning Wiring

Wiring for Gas Boiler Circulator Zoning

Presents a wiring diagram for gas boiler systems, illustrating circulator zoning with domestic hot water priority.

Gas Boiler System Wiring

Typical Circulator Zoning with Domestic Priority

Shows a typical wiring setup for gas boilers with circulator zoning, emphasizing priority for domestic hot water demand.

Steam Boiler Installation and Operation

Low Pressure Steam Boiler Piping

Provides specific precautions and recommendations for connecting the unit to low-pressure steam boilers, including piping below the water line.

Steam System Wiring and Safety

Advises on wiring the aquastat to the boiler's high limit and warns about hot water scald potential in steam systems.

Low Pressure Steam Boiler Piping Schematic

Schematic for Steam Boiler with Condensate

Illustrates a basic piping schematic for a low-pressure steam boiler system using condensate, including key components and requirements.

Steam Boiler Wiring Schematics

Low Pressure Steam Boiler Wiring Options

Presents two wiring schematic options for connecting the unit to low-pressure steam boilers, detailing control configurations.

Operation and Safety Precautions

Pre-Operation Checks and Filling

Outlines essential safety precautions and steps for filling the heater coils and tank before initial operation.

Operating the Water Heater

Guides on starting the boiler, setting temperature for energy efficiency, and warnings about hot water scalds.

Water Heater Operation and Mixing Valves

Boiler Water Temperature and Aquastat Adjustment

Explains how boiler water temperature affects operation and how to adjust the aquastat for optimal performance.

Using a Thermostatic Mixing Valve

Details the operation, setting, and benefits of using a thermostatic mixing valve for safe and consistent hot water temperatures.

Routine Maintenance Procedures

Piping and Pressure Relief Valve Maintenance

Covers yearly visual inspections of boiler and domestic water piping, and monthly operation checks of the pressure relief valve.

Temperature & Pressure Valve and Scale Prevention

Details monthly inspection of the T&P valve and scale inspection, recommending water softeners or chemical cleaning.

Troubleshooting System Problems

Troubleshooting Common Issues

Provides a comprehensive table listing symptoms, possible causes, and corrective actions for various system problems like insufficient hot water or water hammer.