Hydronic System Expansion Panel; Item Zoning Expansion Panel; Applicable Standard UL, CSA (Canada and US); Actuation Type Electronic; Switch Type DIP; Overall Dimensions 9-1/2" Width x 3-3/8" Depth x 8" Height; Input Supply Rating 120 Volt AC at 60 Hertz; Temperature Rating 32 to 130 Deg F; Media Handled Hot Water; Inclusions/Features Auto Test Function to Test Zones at System Start-Up; Application Residential, Hydronic Zoning System; Type of Zoning Devices Controlled 2-Wire Valve; Number of Zone 4; Contact Rating 1/3 HP 120/250 Volt AC 5 Amp; Operating Humidity Range 5 to 90 Percent RH, Non-Condensing; Electrical Connection (2) 14 AWG Wire Clamp Screw Terminal; Weight 3.9 Lb