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High Limit Aquastat Controller, Unit Pk.

L8100B1128/U

High-limit Aquastat® controller operates at 100 F to 180 F with 39 in. long capillary

  • Product Info
  • Literature

Overview

L8100 are immersion type controllers for regulating and limiting the tank temperature in water heater and hrdronic systems. As the water temperature rises past the setpoint, the controller switches off the gas valve.

Features

  • Regulates temperature and provides energy cutoff (ECO) action on a temperature rise past the setpoint.
  • Includes a second sensing element that senses average water temperature to minimize stacking.
  • Fluid-filled element operates Micro Switch™ SPST snap-acting switch.
  • ECO switch interrupts the thermocouple circuit or main valve before tank reaches 210 F (99 C) maximum temperature.
  • Includes factory-installed immersion well on controller.
  • Internal adjustment screw.
  • Special switch terminal provides three-wire hookup from Aquastat® controller to gas valve.

Product Specifications

Application
High Limit
Dimensions (in.)
Case--5 5/8 in. high x 2 in. wide x 2 1/8 in. deep
Dimensions (mm)
Case--143 mm high x 51 mm wide x 54 mm deep
Temperature Range (F)
Temperature Rating (ECO) Energy Cutoff-- 200 F; Maximum--Tank: 210 F
Temperature Range (C)
Temperature Rating (ECO) Energy Cutoff-- 93 C; Maximum--Tank: 99 C
Mounting
Immersion Well
Electrical Ratings
Millivolt--2A maximum at 24 Vac
Approvals, Underwriters Laboratories Inc.
UL Component Recognized: File No. MP466, Guide No. MBPR2
Operating Temperature Range (F)
100 F to 180 F
Operating Temperature Range (C)
38 C to 82 C
Bulb Size (in.)
3/8 in.
Bulb Size (mm)
10 mm
Differential Temperature (F)
Controller: 5 F, fixed. Energy Cutoff Switch: 20 F, fixed.
Differential Temperature (C)
Controller: 3 C fixed; Energy Cutoff Switch: 11 C fixed.
Switching Action
SPST, contacts break on temperature rise.
Approvals, American Gas Association
Design Certified: Report Number 23-11B
Capillary Length (in.)
39 in.
Insulation Depth (in.)
1 1/2 in.
Insulation Depth (mm)
38 mm

Technical Documents

Product Data and Specifications-Product Data for L8100A, L8100B, L8100C Aquastat Controllers (English)