Heater installed horizontally does not provide expected hot water volume.

Safety: Turn off power and close water supply before reconfiguring piping.

Steps:

• Verify model type: Check the Eldom nameplate to confirm if the heater is designed for horizontal or vertical installation.
• Check connections: Ensure the designated hot and cold connections are used correctly according to the orientation diagram on the heater.
• Bleed air: Open the highest hot tap and allow air to escape until a steady stream flows.
• Reinstall correctly: If a vertical-only model is mounted horizontally, it should be reinstalled in the correct orientation or replaced with a horizontal model.