Features:

Immersion Type Controllers that Combine High Limit Protection with Low Limit and Circulator Control in Forced Hydronic Heating Systems
Provide Multi-Zone Control by Using a Separate Circulator and R845 Relay for Each Zone
Include Diaphragm Power Head 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

Specifications:

Manufacturer: Honeywell
Manufacturer Part Number: L8124A1007
Product Type: Hydronic Control Relay
Switch Type: SPST (High Limit), SPDT (Low Limit and Circulator Control)
Input Supply Rating: 120 VAC @ 60 Hertz
Temperature Rating: 130 to 240 Degrees F (High Limit), 110 to 220 Degrees F (Low Limit)
Pressure Rating: 200 PSI (Immersion Well)
Media Handled: Hot Water
Insulation Depth: 1 1/2"
Mounting Position: Vertical
Connection Type: Quick Connect/Screw
Humidity: 0% to 95% RH (Non-Condensing)
Differential Temperature: 10 Degrees F High Limit (Fixed), 10 to 25 Degrees F Adjustable (Low Limit)
Ambient Temperature: 150 Degrees F (Case)/265 Degrees F (Sensing Element)
Burner/Circulator Electrical Rating 7.4 A @ 120 VAC/3.7 A @ 240 VAC Full Load, 44.4 A @ 120 VAC/22.2 A @ 240 VAC Locked Rotor
Dimensions: 5.1" x 7.15" x 5.1"
Weight: 3.16 lb.
Includes: High Limit Protection, Low Limit and Circulation Control, Diaphragm Powerhead