Resideo by Honeywell L8148J1009 Aquastat Relay, Millivolt or Low Voltage

The Resideo by Honeywell L8148J1009 Aquastat relay is an immersion-type hydronic boiler controller for millivolt or low voltage systems. It combines high limit protection with switching relay control of the burner and circulator motor. It is also known as an aquastat relay or boiler water temperature control.

Key Features:

• Immersion-type controller for hydronic heating systems
• Works with millivolt or low voltage control circuits
• Combines high limit protection with relay switching of the burner and circulator motor
• High limit opens the burner circuit only
• Includes a transformer for adding a remote low limit controller
• Can be mounted vertically or horizontally
• Does not include a vent damper plug

It is a suitable replacement relay when a hydronic boiler needs a new aquastat control.