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Item 10 Of 18
Manual Reset Aquastat Controller, Unit


Manual Reset Aquastat Controller, Unit

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  • Product Info
  • Literature


For limiting or regulating temperature of liquids in boilers or tanks. Can also sense duct or outside air temperature.


  • Remote temperature sensing element detects and responds rapidly to temperature changes.
  • Totally enclosed Single Pole Single Throw (SPST) Micro Switch™ snap-acting switch.
  • Visible control point scale and external adjustment screw permit easy setting.
  • Horizontal and/or vertical mounting of the remote element into boiler, tank, or other container unless otherwise noted.
  • UL and CSA listed limit device.

Product Specifications

Hazmat Information
UN 1294, TOLUENE, 3, II
High Limit; Manual Reset
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
Stop factory set at 250 F
Horizontal or Vertical
Electrical Ratings
Millivolt--0.25 A @ 0.25 to 12 Vdc; At Full Load-- 8A @ 120 Vac: 5.1A @ 240 Vac; At Locked Rotor-- 48A @ 120 Vac: 30.6A @ 240 Vac
Approvals, Underwriters Laboratories Inc.
UL Component Recognized: File No. MP466, Vol. 6, Sec.1, Guide No. MBPR2
Approvals, Canadian Standards Association
Certified: File No. LR95329-1
Operating Temperature Range (F)
130 F to 270 F
Operating Temperature Range (C)
54 C to 132 C
Bulb Size (in.)
3/8 in. x 2 7/8 in. copper
Bulb Size (mm)
10 mm x 73 mm copper
Differential Temperature (F)
Manual Reset
Switching Action
SPST, contacts break on temperature rise.
Capillary Length (in.)
66 in. (5-1/2 ft)

Marketing Collateral

Sales/Promotional Materials-Resideo Hydronic Heating Solutions Brochure (English)

Sales/Promotional Materials-Resideo Hydronic Heating Solutions Brochure (French)

Wiring-Typical oil-fired gravity system

Wiring-Typical systems with 120 volt electric heat primaries

Wiring-Typical Powerpile System wiring diagram

Wiring-Typical oil-fired hydronic heating system

Wiring-Typical gas-fired system with domestic hot water

Wiring-Operation of L6008G

Wiring-Operation of L4008L

Wiring-L6008A used to control cooling equipment and indicating light.

Wiring-Typical wiring hookup

Wiring-Typical connection diagram for an oil fired hydronic heating system

Wiring-Typical oil-fired hydronic system with domestic hot water.

Dimension-Approximate immersion well dimensions in in. (mm) for all models except L4006C a

Dimension-Approximate boiler fitting and bulb dimensions in in. (mm) for L4006C and L6006B

Dimension-Approximate installation dimensions in in. (mm) for remote bulb models

Dimension-Approximate case installation dimensions in in. (mm) for direct insertion models

Dimension-Approximate installation dimensions in in. (mm) for surface mount models.

Dimension-Remote Bulb Controller

Technical Documents

Maintenance/Product Reference Materials-Residential Combustion Application Selection and Cross-Reference Guide (English)

Product Data and Specifications-Product Data for L4006,7,8; L6006,7,8 Aquastat® Controllers (English)

Installation Materials-Installation Instructions for L4008E Remote Bulb Aquastat Controller Tradeline (English)