Daikin EKHWSU150B3V3 User Manual

Daikin EKHWSU150B3V3

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INSTALLATION MANUAL

EKHWSU150B3V3

EKHWSU200B3V3

EKHWSU300B3V3

EKUHWBB

EKUHW2WB

Domestic hot water tank with option kit for air to

water heat pump system

4P344370-1.book Page 1 Tuesday, April 2, 2013 2:32 PM

Table of Contents

Questions and Answers:

A
Ashley MorganAug 5, 2025
What to do if my Daikin EKHWSU150B3V3 has continuous water discharge?
- M
  Michael KramerAug 5, 2025
  If you find that your Daikin Water Heater is continuously discharging water, there are several possible causes and solutions: * **Cold water inlet pressure:** Check the pressure reducing valve. If the measured pressure is greater than 2.1 bar, replace the pressure reducing valve. * **Temperature and pressure relief valve:** Check and reset the button. * **Expansion relief valve:** Check the pressure relief valve by turning the red knob counter-clockwise. If you don't hear a clacking sound or the water continues to run, contact your local dealer and close both the water inlet and outlet shut-off valves first.
A
anthony89Aug 11, 2025
Why is the water from my Daikin EKHWSU150B3V3 Water Heater cold?
- R
  Randy ClarkAug 11, 2025
  If the water from your hot taps is cold when using your Daikin Water Heater, here are a few things to check: * **Thermal cut-out:** Check and reset the button(s). * **Unit operation:** Verify the unit is operating. If you suspect any faults, contact your local dealer. * **Solenoid 2-way valve (if installed):** Check the wiring, F2U, and plumbing connections to the solenoid 2-way valve. * **Thermostat setting:** Ensure the thermostat is set to the correct temperature (79°C).
K
Kelly PattersonAug 19, 2025
What to do if my Daikin EKHWSU150B3V3 Water Heater has intermittent water discharge?
- A
  aroweAug 19, 2025
  If you experience intermittent water discharge from your Daikin Water Heater, here are possible causes and solutions: * **Thermal control failure:** Switch off power to the unit. Once the discharge has stopped, inspect the thermal controls and replace them if they are faulty. Contact your local dealer. * **Broken expansion vessel:** Replace the expansion vessel.
R
Robert BirdAug 27, 2025
How to fix no water flow from Daikin Water Heater hot taps?
- B
  Brittany OlsonAug 27, 2025
  If there is no water flow from the hot taps of your Daikin Water Heater, here are a few things to check: * **Main water supply:** Ensure the main water supply is turned on. * **Strainer:** Turn off the water supply, then remove and clean the strainer. * **Cold water inlet pressure reducing valve:** Check and refit the cold water inlet pressure reducing valve.

Daikin EKHWSU150B3V3 Specifications

General

Brand	Daikin
Model	EKHWSU150B3V3
Category	Water Heater
Language	English

Summary

Introduction

General information

Thank you for purchasing this Daikin Altherma EKHWSU domestic hot water tank.

Scope of this manual

This installation manual describes the procedures for installing and connecting the EKHWSU domestic hot water tanks.

Model identification

Details on how to identify the Daikin Altherma domestic hot water tank models.

Accessories

Accessories supplied with the EKHWSU domestic hot water tank

Lists the accessories included with the main EKHWSU domestic hot water tank unit.

Accessories supplied with the EKUHWBB option kit

Lists accessories provided with the EKUHWBB option kit for the domestic hot water tank.

Accessories supplied with the EKUHW2WB option kit

Lists accessories provided with the EKUHW2WB option kit when EKSOLHWAV1 option kit is installed.

Optional equipment

Details about optional equipment available for the domestic hot water tank system.

Installation of the EKHWSU domestic hot water tank

Main components

Safety devices

Outlook diagram

Installation guidelines

Connecting the 3-way valve

Installation position

Describes four possible configurations for connecting the 3-way valve.

Field wiring

Power circuit and cable requirements

Specifies requirements for power circuits and cables for safe operation.

Thermistor cable

Guidance on the placement of thermistor cables to prevent interference.

Connections to be made in the domestic hot water tank electrical box

Instructions for making electrical connections within the hot water tank.

Connections to be made in the unit switch box

Instructions for making electrical connections within the unit's switch box.

Installation of the option kit on the domestic hot water tank

Piping requirements

Details on piping requirements for tundish and pipework.

Requirements to discharges

Guidelines for safe and visible discharge piping.

Installation procedure of the option kit

Step-by-step instructions for installing the option kit on the tank.

Commissioning

Procedures for filling the tank and checking for leaks.

Draining

Steps for safely draining the domestic hot water tank.

Maintenance

Domestic hot water tank booster heater

Advice on cleaning the booster heater to extend its lifespan.

Chemical disinfection

Guidance on using disinfectants with the stainless steel cylinder.

Temperature and pressure relief valve

Instructions for checking the operation of the relief valve.

Pressure reducing valve with integrated non return valve and line strainer

Annual inspection and cleaning of the pressure reducing valve and strainer.

Expansion relief valve

Checking the operation and cleaning the expansion relief valve.

Unit switch box

Visual inspection of the switch box for defects or loose connections.

Troubleshooting

General guidelines

General advice for troubleshooting, including visual inspection and safety.

General symptoms

Lists common symptoms and their possible causes and corrective actions.

Technical specifications

Domestic hot water tank specifications

Detailed technical data for different domestic hot water tank models.

Pressure reducing valve specifications

Field wiring diagram

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