resideo Multiple Aquastat L4081A Quick Start Manual
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resideo Multiple Aquastat L4081A Quick Start Manual

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L4081A,B and L6081A,C
Multiple Aquastat® Controllers
APPLICATION
The L4081 and L6081 Aquastat® Controllers provide boiler
water regulation in gas- or oil-fired hydronic heating
systems.
FEATURES
• 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 (one spst and one spdt in
L6081A,C) act independently at respective temperature
settings.
PRODUCT DATA
60-2105-07

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Summary of Contents for resideo Multiple Aquastat L4081A

  • Page 1 L4081A,B and L6081A,C Multiple Aquastat® Controllers PRODUCT DATA FEATURES • 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.

  • Page 2: Specifications

    L4081A,B AND L6081A,C MULTIPLE AQUASTAT® CONTROLLERS TRADELINE Model Available: L6081A Multiple Aquastat SPECIFICATIONS Controller. IMPORTANT Additional Features: TRADELINE pack with cross reference The specifications given in this publication do not label and special instruction sheet, tube of heat-conduc- include normal manufacturing tolerances. There- tive compound and setting stops.
  • Page 3 L4081A,B AND L6081A,C MULTIPLE AQUASTAT® CONTROLLERS 7/8 IN. (22 MM) DIA. KNOCKOUT INSULATION DEPTH, 1-1/2 (38) WELL-CLAMP FOR 1/2 IN. (12.5) CONDUIT (6) OR 3 (76) SCREW MAXIMUM INSERTION 3-1/2 (89) 1-3/16 (30) 1-13/64 (30.5) 3-7/8 3/4-14 NPT OR 1/2-14 NPT (98.5) 1-13/64 (30.5)

  • Page 4: Installation

    L4081A,B AND L6081A,C MULTIPLE AQUASTAT® CONTROLLERS INSTALLATION When Installing This Product. 1. Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condi- tion. 2. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.
  • Page 5 L4081A,B AND L6081A,C MULTIPLE AQUASTAT® CONTROLLERS 3. Insert a screwdriver into the rectangular slot near the terminal and hold it in the slot while inserting the wire WELL CLAMP STRIP SCREW into the terminal hole as far as possible. GAUGE 4.
  • Page 6 L4081A,B AND L6081A,C MULTIPLE AQUASTAT® CONTROLLERS PILOTSTAT ® (HOT) CONTROL (HOT) CIRCULATOR THERMO- STAT L4081A GAS VALVE RA89A SWITCHING RELAY POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. B TERMINALS ARE TAB TERMINALS. M8788A Fig. 7. L4081A used with burner cycled from the water temperature. (HOT) (HOT) BLACK...

  • Page 7: Operation

    L4081A,B AND L6081A,C MULTIPLE AQUASTAT® CONTROLLERS JUNCTION BOX R4184D PROTECTORELAY™ CONTROL BLACK ORANGE BURNER MOTOR CELL OIL VALVE SOLID STATE SWITCH SAFETY IGNITION SWITCH HEATER WHITE (HOT) CIRCULATOR THERMOSTAT L6081A JUMPER ADDED POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
  • Page 8 L4081A,B AND L6081A,C MULTIPLE AQUASTAT® CONTROLLERS The differential adjustment applies to only the low-limit and/or circulator switch(es). Minimum differential 240 F (116 C) adjustment provided is 10°F (6°C) nominal; maximum is 25°F (14°C) nominal. Set as desired. HIGH LIMIT SWITCH BREAKS ON RISE. Setting Stop SETTING BURNER TURNS OFF.

  • Page 9: Material Safety Data Sheet

    Synonyms: MS1699. PROJECTION "A" Product Use: Heat conductive material used to enhance contact and heat transfer in temperature sensor applications. Manufacturer: Resideo Technologies, Inc., 1985 Douglas Drive North, Minneapolis, MN 55422. Date Released: October 8, 1999. SCALE MARKINGS IN FAHRENHEIT ONLY.
  • Page 10 L4081A,B AND L6081A,C MULTIPLE AQUASTAT® CONTROLLERS Other Protective Equipment: Section 4. First Aid Measures None required. Eye Contact: Section 9. Physical and Chemical Flush eyes with water for 15 minutes. Remove any contact lenses and continue to flush. Obtain medical attention if Properties irritation develops and persists.
  • Page 11 L4081A,B AND L6081A,C MULTIPLE AQUASTAT® CONTROLLERS 60-2105—07...
  • Page 12 Resideo Technologies, Inc. 1985 Douglas Drive North, Golden Valley, MN 55422 1-800-468-1502 www.resideo.com 60-2105—07 M.S. Rev. 04-20 | Printed in United States © 2020 Resideo Technologies, Inc. All rights reserved. This product is manufactured by Resideo Technologies, Inc. and its affiliates.

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Multiple aquastat l4081bMultiple aquastat l6081aMultiple aquastat l6081c

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