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Pump Start Relay Wiring and
Online Setup
In this article, we will discuss the following topics:
Summary
Operation Chart
Wiring (24 VAC)
Wiring to Power Source
Online Setup
Pump Start Relay Operation per Zone
Summary
When a system requires the use of a booster pump or pulls water directly from a creek or
pond, it’s imperative to include a relay to activate the pump each and every time. A pump
start relay is a relay box that activates a pump every time a zone is activated from the
controller. Zone valves are the individual valves that operate a group of sprinklers or drip
emitters. Hydrawise controllers support 6- to 54-zone valves, depending on the model.
Typically, one zone valve is turned on at a time and controls the irrigation in a specific area
of your landscape. Whenever one of the irrigation zone valves is told to open by the
controller, the controller also signals the pump start relay to turn the pump on.
Operation Chart
Controller Model Set Pump Operation
HC ON or OFF by All Zones
PRO-HC
ON or OFF by All Zones
HPC ON or OFF by Zone or All Zones
HCC
ON or OFF by Zone or All Zones
Wiring (24 VAC)
Use a minimum distance of 15' (4.5 m) between the controller and the relay to dampen
electromagnetic noise. In addition to this recommendation, Hunter also recommends all
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