Features
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.
Product Specifications Back To Top
Description High Limit Protection, Low Limit and Circulation Control Triple Aquastat Relay with High limit : 10 F fixed; low limit: 10-25 F adj. Differential
Application High Limit Protection, Low Limit and Circulation Control
Operating Range, Low Limit (F) 110 F to 220 F adj.
Operating Range, Low Limit (C) 43 C to 104 C adj.
Operating Range, High Limit (F) 130 F to 240 F adj.
Operating Range, High Limit (C) 54 C to 116 C adj.
Differential Temperature (F) High limit : 10 F fixed; low limit: 10-25 F adj.
Maximum Safe Operating Pressure (psi) 200 psi on outside of immersion well, 100 psi on capsule if inserted directly.
Maximum Safe Operating Pressure (kPa) 1378 kPa on outside of immersion well, 690 kPa on capsule if inserted directly.
Electrical Ratings (burner AFL) 7.4 A @ 120 Vac
Electrical Ratings (burner AFL) 3.7 A @ 240 Vac
Electrical Ratings (burner ALR) 44.4 A @ 120 Vac
Electrical Ratings (burner ALR) 22.2 A @ 240 Vac
Electrical Ratings (circulator AFL) 7.4 A @ 120 Vac
Electrical Ratings (circulator AFL) 3.7 A @ 240 Vac
Electrical Ratings (circulator ALR) 44.4 A @ 120 Vac
Electrical Ratings (circulator ALR) 22.2 A @ 240 Vac
Voltage 120 Vac
Dimensions (in.) 6 1/8 in. high x 4 3/8 in. wide x 3 1/16 in. deep
Dimensions (mm) 156 mm high x 111 mm wide x 78 mm deep
Insulation Depth (in.) 1 1/2 in.
Insulation Depth (mm) 38 mm
Mounting Vertical Mount
Operating Humidity Range (% RH) 0 to 95% RH, non-condensing
Maximum Ambient Temperature (F) 150 F at switches, 265 F at sensing element.
Maximum Ambient Temperature (C) 66 C at switches, 129 C at sensing element.
Approvals, Underwriters Laboratories Inc UL Listed (models with well): File No. MP466, Guide No. MBPR; UL Component Recognized (models without well): File No. MP466, Guide No. MBPR2
Approvals, Canadian Standards Association Certified: File No. LR1620, Guide No. 400-E-O
Includes 3 in. insertion well.
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