SR1, Pump Start Relay by Irritrol

Pump Start Relay is housed in a weather resistant case Model #SR-1
The pump start relay is designed for use on turf sprinkler systems. When the Irrigation Clock / Control calls for an "on cycle" the pump start relay converts the (24V) low voltage to line voltage so that that pump may be energized by the operation of the irrigation timer. No pressure switch or pressure tank is needed or used with this simple irrigation set-up. The pump start relay handles line voltage in the range of 120V or 240 / 250V.

Here's a good question about how to tweak an irrigation controller to run landscape lighting. As you will read clever application of an irrigation zone controller coupled with a SR1, Pump Start Relay by Irritrol creates a solution for this situation.

Q: Does the controller supply the main power to the landscape lights?

A: No, the controller provides switching control for a 24-volt, AC relay using the controller’s zone wires and the Valve Common wire. You can use the Irritrol SR-1 relay, usually used to start pumps, the Irritrol SR-1 relay has a 24-volt relay that closes a bigger, main power relay that lets power through to the lighting transformer. Some landscape lighting manufacturers, like Nightscaping®, have transformers for lighting housed in cabinets that have a 24-volt relay for switching on the incoming power.

Note: Creative use of Irrigation Zone Controllers coupled with SR-1 can also be used to control other devices, for example for your water feature pumps in decorative fountains.

About Irritrol

Irritrol has been the Contractor’s choice for over 40 years. Contractors have come to depend upon the Irritrol name for quality, durability and reliability. Irrigation industry professionals count on Irritrol to supply a product that will save them time and money, ultimately benefiting their bottom line and increasing productivity.

Irritrol’s controllers - Rain Dial®, Rain Dial® Plus, Total Control® and the MC Plus®- B Series - first established our reputation in the industry for easy-to-use, dependable and innovative products. As a homeowner, you know you’re making the right choice when your professional chooses Irritrol for your irrigation project.

AKA: Hardie Pump Start Relay SR-1

Irritrol SR1, Pump Start Relay - Installation Instructions

SR-1 Installation Instructions

Step 1: Mount the Irritrol SR-1, Pump Start Relay

A. Mount the hanger kit (1-hanger / 1-screw) to the top/back of the relay case.
B. Remove the lower writing compartment cover to allow access to the lower mounting holes.
C. Mount the relay on a wall or other solid area using the mounting hanger. To secure the relay, use the screw holes located in the lower wiring cavity.

CAUTION: When using electronic controllers; (1) the pump start relay should be mounted with a 5 foot (min) space between itselft and the controller. (2) The controller should be 12 feet (min.) from the pump. (3) The controller should be on a seperate power source than that of the pump (it is a high power user). If these steps are not taken, malfunctions may occur.

STEP 2: Connect SR-1 pump start relay to power source and motor.

A. To prevent electrical shock, turn the main circuit breaker switch to off prior to making any electrical connections.
B. Remove the "caution high voltage" plate.
C. Assemble conduit piping and connect wiring from the electical junction box (power source) to one side of the relay's power wires, (one set of yellow/blue wires). Attach wires by using wire nuts as shown in the illustration.
D. Assemble conduit piping and connect wiring from the pump motor to the other side of the relays power wires (other set of yellow/blue wires).
E. Carefully push all power wires into the wiring cavity making sure that there are no exposed or loose connections. Replace the "caution high voltage" plate.

CAUTION: This pump start relay will control 1 HP pump at 120 VAC or 1.5 to 2 HP pumps at 240/250 VAC. Do not attach to larger commercial units or exceed the contact ratings as shown.

STEP 3: Connect pump start relay to the sprinkler / irrigation controller.

The two white wires in the lower wiring compartment are to be attached to your sprinkler clock controller. Use an irrigation controller that has a maximum of 30 volts to the irrigation zone valves. Do no use with any timing device that exceeds the maximum operating requirement to coil/white wires.

Note: Use 18 gauge wire for runs up to 800 feet. For longer distances, (2000 feet maximum) use 14-gauge wire. Use copper conductors only - Rated 60 C.

A. Run a single wire from your controller "common" line connection to either one of the white wires in the relays wiring compartment.
B. Run a single wire from your controller "pump" or "master" valve connection to the other white wire.

When the irrigation controller activates a control zone valve, it will simultaneously send voltage to the pump start relay's coil / switch and turn on the pump motor.

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