CPM

Expect to change the following parts when completing a service:

• Item 103: Ignition Electrode
• Item 105: Combustion Chamber Rear Wall Insulation
• Item 106: Burner Door Outer Seal
• Item 107: Burner Door Insulation

These items are available as part of a Maintenance Set which is Item 104 in the parts list.

• Version 2 boilers can NOT be cascaded with Version 3, CPM+ or CPM ERP
• Version 3 boilers can NOT be cascaded with Version 2, CPM+ or CPM ERP
• CPM+ boilers CAN be cascaded with CPM ERP.

For Version 2 or 3 CPM’s & EF/EF+ units:

• Locate the small hole below the 4 pin data port on the front of the facia.
• Insert a small Allen key or pencil point into the hole and press & hold the micro button.
• This will start the appliance in Service Mode. Turning the RED thumb-wheel fully clockwise will run the appliance up to full rate.  Turning the RED thumb-wheel fully anticlockwise will drop the appliance to low rate.  Service mode will time out after 10 minutes.

For CPM+ & CPM ERP:

• Locate the button on the facia which resembles an archery target (service button) and press & hold it for about 5 seconds.
• This will start the appliance up in Service Mode. After stabilisation, the appliance will drop down to low rate (25%).
• Press & hold the UP arrow key until the display reads above 97%. This is considered Full rate. This can be repeated UP & DOWN. Service Mode will time out after 10 minutes.

There have been four versions of the CPM to date:

• Version 2; with a 2 character LED display and a RED, GREEN & BLUE thumb-wheel on the front. This used SIT910 electronics.
• Version 3; with a 3 character LED display and a single RED thumb-wheel on the front. This used SIT914 electronics.
• CPM+; with an LCD display and push buttons on the front. The outer casing has a green decal around the display window. This used BIC electronics.
• CPM ERP; with an LCD display and push buttons on the front. The outer casing has a grey strike decal around the display window. The integral pump is a modulating type. This used BIC electronics.

Remove the front casing panel and then look up at the inside of the top casing. On the front right you will find the data plate.
Over the years, there have been several engineering changes and versions of these appliances. If you are ordering any spares for these appliances, it is essential that you provide the serial number. From this, we can gain the following details on the appliance:
• If the appliance is one of Lochinvar’s
• Which electronics package and model it is
• The production number
• The week and year of manufacture