This Honeywell L7224U-1002 Universal Electronic Oil Aquastat with EnviraCOM Communication electronically monitors and controls circulator, burner, and boiler temperatures and provides electronic temperature sensing in an oil-fired hydronics heating appliance (not included), and is UL recognized. The device is EnviraCOM communication enabled for use with the Honeywell EnviraLINK service (not included) for remote monitoring. It offers multizone control and offers accuracy up to +/-2 degrees. The low limit can be disabled for cold start boiler applications. The LED display provides diagnostic and status information. The Aquastat mounts directly or remotely, vertically, horizontally, or flush to a surface.
Differential temperature (high limit) 5 to 20 degrees F adj.
Differential temperature (low limit) 10 to 25 degrees F adj.
L is length, the horizontal distance from left to right; W is width, the horizontal distance from front to back; H is height, the vertical distance from bottom to top.