The L4081A1023 high limit, low limit and/or circulator controllers by Honeywell are used to regulate boiler water temperature in gas or oil-fired hydronic heating systems.
• An immersion type liquid-filled sensing element actuates two snap switches.
• One switch operates as a high limit control.
• The other switch operates as a low limit and/or circulator control, depending on the model.
• Controller may be mounted in any positioning and needs no leveling.
• Separate, easy-to-read, calibrated dial and setpoint adjustments for each switch.
• Differential adjustment on low limit or circulator switch.
• All adjustments accessible inside front cover.
• Push-in terminals for quick connecting.
• Single sensing element for easy installation.
• Two SPST snap switches act independently at respective temperature settings.