THERMO 2000 TURBOMAX 23

Questions and Answers

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Joe MendezAug 16, 2025
Why is the water at the faucet too hot with my THERMO 2000 TURBOMAX 23 Water Heater?
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  Pamela RyanAug 16, 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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karenwilsonAug 19, 2025
How to fix water hammer noise in THERMO 2000 TURBOMAX 23?
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  Jacob GreeneAug 20, 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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ibatesAug 23, 2025
Why is my THERMO 2000 Water Heater producing insufficiently hot water?
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  Joshua PerezAug 23, 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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Jennifer LucasAug 27, 2025
Why is my THERMO 2000 TURBOMAX 23 Water Heater boiler over-cycling?
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  Natalie JamesAug 27, 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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ryan61Aug 30, 2025
How to stop water noise in THERMO 2000 TURBOMAX 23 Water Heater hydronic system?
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  Stephanie MejiaAug 30, 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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Christine WilsonSep 3, 2025
What to do if THERMO 2000 TURBOMAX 23 drips from the pressure relief valve?
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  Brian MitchellSep 3, 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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kentmonroeSep 7, 2025
How to increase domestic hot water in THERMO 2000 TURBOMAX 23 Water Heater?
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  James CarterSep 7, 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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Tony AllenNov 11, 2025
What to do if there is no hot water at the faucet in THERMO 2000 TURBOMAX 23 Water Heater?
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  Joseph WeeksNov 11, 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

TURBOMAX Specifications

General Safety Precautions

Introduction and Installation Overview

Local Installation Regulations

Conformity to local, state, provincial, and national codes for installation.

Decisions Required Before Installation

Key decisions and considerations before starting the installation process.

Location Guidelines

Guidelines for selecting an appropriate and safe installation location for the water heater.

Installation Procedures

Domestic Water Connections

Instructions for connecting domestic cold and hot water lines to the TURBOMAX unit.

Expansion Tank for Potable Water

Requirements for installing an expansion tank in the potable water supply line.

Recirculation Line Installation

Guidance on installing a recirculation line, including check valve requirements.

Piping Schematics

Buffer Tank and Radiant Floor Piping

Two Water Heater Piping Schematic

Commercial Piping Schematic

System Components and Connections

Domestic Hot Water Temperature & Pressure Relief Valve

Requirements and installation of the domestic hot water temperature and pressure relief valve.

Thermostatic Mixing Valve

Recommendations for installing and setting a thermostatic mixing valve for safe operation.

Vacuum Breaker Requirements

Guidance on installing a vacuum breaker for water heater protection against siphoning.

Boiler Water Connections

Instructions for connecting the boiler water supply and return lines to the TURBOMAX.

Circulator Zoning Recommendations

Recommendations for the placement and wiring of circulator pumps in zoned systems.

Zone Valve Zoning Recommendations

Recommendations for zone valve installation and wiring in heating systems.

Pump and Pipe Sizing

Boiler Water Temperature Drop Calculation

Explanation and calculation methods for boiler water temperature drop (TD).

Pump Flow Rate Calculation

Formula and example for calculating the required pump flow rate for the system.

Pipe Sizing Criteria and Pressure Loss

Pressure Loss from Water Flow in Pipes

Understanding and calculating pressure loss due to water flow in pipes and fittings.

System Pressure Drop Calculations

Pressure Loss from Fittings and Valves

Information on pressure losses caused by fittings and valves in piping systems.

Pressure Loss in TURBOMAX Tank

Understanding pressure losses within the TURBOMAX tank itself.

Pressure Loss from Boiler or Other Equipment

Guidance on obtaining pressure loss information for boilers and other equipment.

Piping System Pressurization

Expansion Tank Sizing

Steps and considerations for accurately sizing an expansion tank for the system.

Wiring Instructions

Temperature Control Settings

Details on the aquastat's temperature and differential adjustment settings.

Circulator Zoning Wiring

Wiring instructions for circulator zoning to ensure proper water supply demand.

Zone Valve Zoning Wiring

Wiring guidelines for zone valves to manage heating demand and circulator operation.

Wiring Schematics

Separate Circulator Wiring

Wiring diagram for a separate circulator system using line or low voltage.

Priority to TURBOMAX Circulator Wiring

Wiring diagram for prioritizing the TURBOMAX circulator for domestic hot water demand.

3 Wire Zone Valve Wiring (24 VAC)

Wiring diagram for a 3-wire zone valve system operating on 24 VAC.

4 Wire Zone Valve Wiring (24 VAC)

Wiring diagram for a 4-wire zone valve system operating on 24 VAC.

4 Wire Zone Valve Wiring (120 VAC)

Wiring diagram for a 4-wire zone valve system operating on 120 VAC.

Circulator Zoning with Domestic Priority Wiring

Circulator Zoning Wiring Diagram

Gas Boiler Circulator Zoning Wiring

Steam Installation Precautions

Low Pressure Steam Boiler Piping

Piping precautions for connecting to low-pressure steam boilers, including water line considerations.

Steam Installation Wiring

Recommendations for wiring the TURBOMAX aquastat to a steam boiler's high limit control.

Low Pressure Steam Boiler Piping Schematic

Steam Boiler Wiring Schematics (2 Options)

Water Heater Operation

Safety Precautions Before Operation

Essential safety measures to follow before operating the water heater.

Filling the Heater Coils

Steps for filling the heater coils with water and checking for leaks.

Filling the Heater Tank

Procedure for filling the TURBOMAX tank with boiler water and purging air.

Operating with a Thermostatic Mixing Valve

Maintenance Procedures

Boiler Water Piping Inspection

Annual visual inspection of boiler water piping for leaks and joint integrity.

Pressure Relief Valve Inspection

Monthly inspection and manual operation of the pressure relief valve for proper function.

Domestic Water Piping Inspection

Annual visual inspection of domestic water piping for leaks and joint integrity.

Temperature & Pressure Valve Inspection

Annual inspection and manual operation of the temperature & pressure valve.

Scale Prevention and Cleaning

Information on scale formation, its prevention, and cleaning methods.

Troubleshooting System Problems

Replacement Parts List

Aquastat Replacement Procedure

Step-by-step instructions for safely replacing the aquastat component.

TURBOMAX Limited Warranty