AMX RADIA LIGHTING CONTROL ENCLOSURE WORKSHEET GUIDE Specifications download pdf (Page 42)

6. Determining Programmable Settings

Rain Bird

ET Manager Series - Installation and Operation Manual 42

Sprinkler Controller and

Station Information

The sprinkler system delivers water to the landscape

refilling the soil reservoir. To use an ET Manager, the site

must have an operating sprinkling system complete

with automatic valves controlled by a sprinkler con-

troller. The sprinkler system capabilities affect how to

program your sprinkler controller and your ET Manager.

Refer to chapter 4, Programming, for more detail on

programming your sprinkler controller.

Sprinkler Controller Type

An ET Manager is compatible with almost all sprinkler

controllers including basic non-ET controllers and

advanced ET-based controller systems. The sprinkler

controller type must be determined upon installation to

decide the Output Method used with your ET Manager.

Non-ET based sprinkler controllers are installed and

programmed to the Enable Output Method (see

“Output Method” below). ET-based sprinkler con-

trollers are installed and programmed to an advanced

Output Method. Refer to chapter 8, Advanced Output

Methods, to determine which method is appropriate

for your ET-based sprinkler controller.

Station

Stations on a sprinkler controller are connected to spe-

cific valves that are activated according to your ET

Manager. Each station should have plants with similar

water requirements within its area. Stations are also

referred to as “zones.” Stations must be assigned to

specific ET Manager Valve Groups A, B, or none.

Note: When a station has a wide variety of water

requirements within its area, it becomes necessary to

water according to the area in the station that needs the

most water to keep plants healthy.

Description

The station description can include information that

describes the on-site location of the station and the

condition of the landscape in the station at the time of

the site assessment.

Valve Group Assignment

Your ET Manager supports two valve groups. For

example, Valve Group A may be assigned to lawn sta-

tions and Valve Group B may be assigned to shrub sta-

tions. Determine how the Valve Groups are to be

assigned to each station.

To use both Valve Groups A and B with your sprinkling

system, the common wire to A valves must be separate

from the common wire to B valves. While the sprinkler

system is being installed two common wires must be

used; one to Valve Group A and one to Valve Group B.

When retrofitting an existing system, a spare wire can

be used for the common on one of the valve groups.

Sprinkler Type and Precipitation Rate

Sprinkler systems are a complex arrangement of sprin-

kler heads, valves, and piping. Sprinkler type, layout,

nozzle size, and water pressure affect the rate water is

applied by the sprinklers. The rate at which water is

applied to the landscape or the precipitation rate is

measured in inches per hour.

The precipitation rate is needed to determine the sta-

tion run times, or how long the valves should run to

deliver the programmed ET Manager Irrigation

Amounts. For example, if the Irrigation Amount is 0.5

inches and the station sprinklers apply 1.50 inches of

water per hour, it would take 20 minutes to apply the

Irrigation Amount (0.50 inches). Refer to Appendix V

for more information on calculating precipitation rates

and station run times.

Sprinkler systems apply water with varying degrees of

uniformity or efficiency. Station run times may need to

be increased to compensate weaknesses in sprinkler

coverage.

Exposure

When assessing a site it is important to observe condi-

tions, such as environmental exposures. Sun exposure

and high wind exposure increase the rate of evapora-

tion. By understanding the exposures, you can make

better water scheduling decisions. Exposure areas that

would increase the rate of evaporation may need longer

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