Takagi GS-2000W-AU - User Manual

Questions and Answers

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Elizabeth NelsonAug 12, 2025
What to do if hot water is not available when a fixture is opened in Takagi GS-2000W-AU Water Heater?
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  Jennifer ReevesAug 12, 2025
  If hot water is not available when you open a fixture, ensure the unit has a 240V 50Hz power supply. If you're using a remote controller, check if it's turned on. Also, verify that the gas and water supply valves are fully open. Make sure the filter on the cold water inlet is clean and the hot water fixture is sufficiently open to draw at least 3.0 l/min through the water heater. Finally, check if the unit is frozen or if there is enough gas in the tank (for propane).
L
Lisa DeleonAug 16, 2025
Why is the water not hot enough in my Takagi GS-2000W-AU Water Heater?
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  Stephanie BruceAug 16, 2025
  If the water from your Takagi water heater isn't hot enough, compare the flow rate and temperature. Check for cross plumbing between cold and hot water lines. Ensure the gas supply valve is fully open and that the gas line is sized properly and the supply pressure is adequate. Also, verify that the set temperature isn't too low.
W
William KhanAug 19, 2025
What to do if the hot water gets cold and stays cold with Takagi GS-2000W-AU?
- K
  Kimberly CaseAug 19, 2025
  If the hot water from your Takagi water heater gets cold and stays cold, ensure the flow rate is sufficient to keep the water heater running. Check that the gas supply valve is fully open and the filter on the cold water inlet is clean. Also, make sure the fixtures are free of debris and obstructions.
S
smithbrianAug 23, 2025
What to do if Takagi GS-2000W-AU unit does not ignite when water goes through the unit?
- S
  Sara HaleyAug 23, 2025
  If your Takagi water heater doesn't ignite when water flows through it, ensure the flow rate is over 3.0 l/min. Check the filter on the cold water inlet for any blockages. Inspect for reverse or cross connections. If you're using a remote controller, verify that it is turned on.
T
Tara AllenAug 27, 2025
Why does the hot water temperature fluctuate in my Takagi GS-2000W-AU Water Heater?
- J
  Jordan CampbellAug 27, 2025
  If you're experiencing fluctuations in hot water temperature with your Takagi water heater, start by checking if the filter on the cold water inlet is clean. Also, verify that the gas line is properly sized and the gas supply pressure is adequate. Finally, check for any cross-connections between the cold and hot water lines.
A
Allison MelendezAug 31, 2025
Why is the water too hot from my Takagi GS-2000W-AU?
- A
  Anthony JohnstonAug 31, 2025
  If the water from your Takagi water heater is too hot, check if the set temperature is set too high.
J
Jennifer HurleySep 3, 2025
How to fix a Takagi GS-2000W-AU Water Heater remote controller that does not display anything when turned on?
- M
  mstoneSep 3, 2025
  If the remote controller for your Takagi water heater doesn't display anything when turned on, press the ON/OFF button. If the lamp still doesn't light, ensure the unit has a power supply. Also, verify that the connection to the unit is correct.
D
Dustin McdonaldSep 7, 2025
How to fix a Takagi GS-2000W-AU Water Heater remote controller that can not change the set temperature?
- L
  lopezjessicaSep 7, 2025
  If your Takagi water heater remote controller can't change the set temperature, check if the priority lamp is lit. If it's not, press the priority button after closing all hot water taps.

Summary

IMPORTANT

FOR THE INSTALLER

Information for installers regarding regulations and standards for water heater installation.

FOR THE SERVICER

Guidelines for maintenance and fault-finding according to applicable regulations.

FOR THE PLUMBER

SPECIFICATIONS

INTRODUCTION

ACCESSORIES

DIMENSIONS AND CONNECTION POINTS

SAFETY GUIDELINES

INSTALLATION

CONFIRM THE APPLIANCE SUITABILITY

Ensuring the unit meets gas type, pressure, water pressure, and electrical rating requirements.

ABOUT SELECTING AN INSTALLATION LOCATION

CLEARANCES FOR OUTDOOR HEATER LOCATIONS - AS5601

GAS CONNECTIONS

SIZING AND CONNECTING

Guidance on gas type, pressure, and proper sizing of gas piping for the water heater.

MEASURING INLET GAS PRESSURE AND TESTING GAS LEAKAGE

WATER CONNECTIONS

ELECTRICAL CONNECTION

REMOTE CONTROLLER (OPTIONAL)

MAIN REMOTE CONTROLLER (MODEL: MC100-AU3-TP)

Details on the main remote controller, its placement, and temperature adjustment range.

SHOWER CONTROLLER (MODEL: FC100-AU3-TP) AND ENSUITE CONTROLLER (MODEL: SC100-AU3-TP)

Information on shower and ensuite controllers, their water resistance, and temperature adjustment.

REMOTE CONTROLLER INSTALLATION

CONNECTION OF REMOTE CONTROLLER WIRING TO THE WATER HEATER

INITIAL OPERATION

NORMAL OPERATION

WITHOUT REMOTE CONTROLLER

How to operate the water heater using only the unit's controls and setting the temperature.

WITH ONLY MAIN REMOTE CONTROLLER INSTALLED

Steps for operating the water heater with a single main remote controller, including temperature adjustment.

WITH MULTIPLE REMOTE CONTROLLERS INSTALLED

FREEZE PREVENTION

WINTER SHUTDOWN

MAINTENANCE AND SERVICE

UNIT DRAINING and FILTER CLEANING

Step-by-step guide for draining the unit and cleaning the water inlet filter.

GENERAL TROUBLESHOOTING

REMOTE CONTROLLER (OPTIONAL)

Troubleshooting common issues with the remote controller, including display and temperature setting problems.

PCB ERROR CODES

WIRING DIAGRAM

OPERATING INSTRUCTIONS

TO TURN OFF GAS TO APPLIANCE

Procedure for safely shutting off the gas supply to the water heater for maintenance or service.

WATER FLOW AND WATER TEMPERATURE

WARRANTY CONDITIONS

Takagi GS-2000W-AU Specifications

General

Type	Tankless
Category	Residential
Fuel Type	Natural Gas
Flow Rate	10 GPM
Dimensions	6.7" D x 13.8" W x 23.4" H
Weight	38 lbs
Installation Type	Indoor
Venting	Direct Vent
Capacity	N/A (Tankless)
Maximum BTU Input	199, 000 BTU/h
Energy Efficiency	0.82 EF
Maximum Temperature	140°F
Ignition Type	Electronic