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Caleffi - ZSR104 Relay (pump and boiler operating control) The ZSR series is multi-zone pump and boiler operating control for multiple zone hydronic heating systems. The ZSR series interfaces with low voltage thermostats or any other low voltage controllers having a switching action. The ZSR series controls up to 3, 4, 5 or 6 heating circulator pumps, depending on model selected, a primary pump, and has LED indicators to provide functional status and easy system troubleshooting. In addition, a primary pump system circulator is switched on whenever any zone calls for heat.Replaceable fuses:= Type 2AG, 5A slow blow.
Additional Information
Transformer Voltage 24 Vac,
Maximum Transformer Load 12 Va (Zsr101/103/104), 20 Va (Zsr106),
Switch Rating 10A (Zsr101), 20A (Zsr103/4/6) Max Combined,
Electrical Switch Rating Pump Output 120 Vac, 5A Each,
Dry Contact Rating Aux, Xx, Zone
CategoryZone Valves, Controls and Coil Kits
Height3.5"
Length12.25"
ManufacturerCaleffi
MpnZSR104
SubcategoryZ-one™ Zone Controls
TypePump Zone Controls
Weight0.7 LB
Width12.25"
Instruction Sheet