479 East 186th Street Bronx, N.Y.  10458

Monday - Friday 7am-5pm  Saturday 8am-3pm

Price: $190.00

    Item #: L4081B1047
    Availability: In stock
    Usually ships In 1-2 Business days
    In stock Quantity: 0


    High limit, low limit and/or circulator controllers 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 on select models.
    • 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..

    Product Specifications

    Hazmat Information
    UN 1294, TOLUENE, 3, II
    High Limit and Circulator
    Dimensions (in.)
    3 7/8 in. high x 4 1/8 in. wide x 2 3/4 in. deep.
    Dimensions (mm)
    98 mm high x 105 mm wide x 70 mm deep.
    Temperature Range (F)
    Maximum--150 F at switches; 265 F at sensing element
    Temperature Range (C)
    Maximum--66 C at switches; 129 C at sensing element
    Electrical Ratings
    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 Listed: File No. MP466, Vol. 12, Sec. 4, Guide No. MBPR2
    Approvals, Canadian Standards Association
    Certified: File No. LR95329-1
    Operating Humidity Range (% RH)
    0 to 95% RH, non-condensing
    Operating Temperature Range (F)
    High Limit-- 130 F to 240 F; Low Limit-- 110 F to 220 F
    Operating Temperature Range (C)
    High Limit-- 54 C to 116 C; Low Limit-- 43 C to 104 C
    Differential Temperature (F)
    High limit : 10 F fixed; low limit: 10-25 F adj.
    Switching Action
    SPST: High Limit & Circulator
    Well Spud Size (in.)
    3/4 in. - 14 NPT
    Well Spud Size (mm)
    19 mm - 14 NPT
    Insulation Depth (in.)
    1 1/2 in.
    Insulation Depth (mm)
    38 mm
    Electrical Ratings, Ignition
    Transformer Load: 360 VA