Herald HCB

Expect to change the following parts when completing a service:

• Item 4: Burner Door Insulation
• Item 5: Combustion Chamber Insulation
• Item 9: Ignition Electrode C/W Gasket
• Item 10: Burner Door Insulation
• Item 20: Burner Door Rubber Gasket

Please refer to the Spare Parts Finder for part numbers specific to the model you’re servicing.

There is no flow switch fitted to the appliance at manufacture.  It is possible to connect a flow switch by removing the link wire across the flow switch terminals.

Follow the procedure below:

To reset the service notification on the version 2 EKW / Herald Boiler will require a code. Please follow the steps below:

• Press and hold the L/H SELECT  button
• Enter the code 5309 using the DIAL scan through the numbers and pushing the dial to accept correct number
• Press SELECT
• “Installer Code” should be displayed
• Scroll through the sub menus until you find Service notification
• Press SELECT
• Scroll to Reset Service Reminder
• Press SELECT
• It will ask you to Confirm
• Press SELECT
• You should see the word “engaged” briefly displayed.
• Press the R/H SELECT button three times to return to the front display screen
• The service notification is now reset.

There is no Non-Return Valve in the flue.  If the appliance is to be used on a common flue, it is the responsibility of the Flue Designer/Installer to ensure there is no re-circulation of combustion products through any appliances attached to the common flue.