White-Rodgers 752-1 hydronic changeover switch is a strap-on control for combination hot and chilled water systems. It senses tubing temperature to switch thermostat output to the heating or cooling side of a two-wire zone valve.
Curved sensing element seats on 1/2-inch tubing, 5/8-inch O.D., with a removable spring clip. Epoxy-resin sealing keeps out dust and corrosion; this version comes without conduit connector.
752-1 highlights
Automatic hot/cold changeover
Shifts zone-valve operation with water temperature.
SPDT switching
Connects heating or cooling side to a two-wire zone valve.
Tubing clip mount
Attaches to 1/2-inch tubing with removable spring clip.
Epoxy-sealed body
Resists dust and corrosion in mechanical spaces.
752-1 specifications
Switch: SPDT
Housing: Sealed with epoxy resin
Mounting: 1/2 inch tubing (5/8 in O.D.) with removable spring clip
Application: Combination hot / chilled water systems with zone valve
Control type: Automatic changeover switch for hydronic temperature control
