Designed to thermostatically turn any B and G NBF circulator ON and OFF. The AQ-1/2 or AQ-3/4 will switch the pump OFF at 120 deg F (48.9 deg C) and ON at 100 deg F (37.8 deg C). The aquastats are available in separate models that will sense the temperature for either 1/2 in or 3/4 in copper pipe.

Bell & Gossett Aquastat, Specifications: 115/120VAC 60 Hz

• OFF (open) at 120 deg F (48.9 deg C) water temperature and ON (closed) at 100 deg F (37.8 deg C) water temperature thermostatic switch modes
• Bimetal, senses surface temperature of outside diameter of pipe thermostatic element
• AQS-1/2 clips onto 1/2 in copper pipe or 3/8 in steel pipe (OD of pipe 5/8 in) and AQS-3/4 clips onto 3/4 in copper pipe or 1/2 in steel pipe (OD of pipe 7/8 in) pipe size
• Mounting: May be installed to sense temperature at the suction or discharge pipe of the pump
• Epoxy (Environmentally Sealed) thermostat covering
• Stainless steel pipe clip
• Bimetal sensing element
• Insulated 18 in (457 mm) No 18 AWG wire leads
• Connects to the lead wires in the connection box of any Bell and Gossett NBF/NRF/SSF circulator
• Provides thermostat control to the circulator and It will turn OFF (open) at 120 deg F (48.9 deg C) water temperature and ON (closed) at 100 deg F (37.8 deg C) water temperature

• Specification Sheet https://www.hirsch.com//ASSETS/DOCUMENTS/ITEMS/EN/https://assets.unilogcorp.com/2/ITEM/DOC/Xylem_113210_Specification_Sheet.pdf