Three residential zone controls that are loaded with features that ensure easy, trouble-free operation of zoned hydronic heating systems are available. They are nonnetworked devices intended to be used for circulator and boiler control. Models include single, three, and four expandable to six zone configurations. The controls offer a high-resolution LED display for system status and zone function. They also offer priority and freeze protection options. Features include multipanel linking, automatic reset positive temperature coefficient fuse on system 24 vac, a high-capacity 25VA rated transformer, multiple knockouts, and separate terminals for cold start or tankless coil boilers. According to the manufacturer, a key advantage to the controls is that only one relay is required for all models.
Grundfos Pumps Corp., 17100 W. 118th Terrace, Olathe, KS 66061; 913-227-3400; 913-227-3500 (fax); www.grundfos.com