Triple Aquastat® Relay

Mounting: Horizontal; Burner Circuit Type: 120V;

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  • Immersion-type controllers that combine high limit protection with low limit and circulator control in forced hydronic heating systems
  • Provide multizone control by using a separate circulator and R845 Relay for each zone
  • Include diaphragm powerhead and Micro Switch™ assembly that respond to temperature changes in boiler water
  • Mount directly to boiler
  • Select models include large transformers and extra terminals for supplying power to low voltage zone valves
  • Require 24 Vac thermostat with heat anticipator set at 0.2 A (plus current draw of gas valve on L8124E)
  • TRADELINE models include tube of heat conductive compound and range stops

Mounting: Horizontal; Burner Circuit Type: 120V;


Low limit: 110°F to 220°F adjustable; 10°F to 25°F adj. diff. |High limit: 130°F to 240°F adjustable; 10°F fixed differential

Product Specifications

Burner Circuit Type120V
Shipping Weight3.10
Shipping Width5.00
Shipping Length7.10
Shipping Height5.20

Compliance & Notes

Harmonize Code9032896025

See catalog page 492 for additional notes and/or restrictions.

Warranty Information

WARRANTY - Johnstone Supply will administer and promptly process all warranties in accordance with the manufacturer's specific warranty policies and procedures.

WHOLESALE ONLY - Identification is required of purchasers. Possession of Johnstone's catalog does not constitute an offer to sell by Johnstone or the right to purchase from us.

RETURNS - All returns are subject to a restocking charge.

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See other: Honeywell - Relays
See all: Honeywell Products

Mfg. #: L8124C1003