Acclima SC24 and SC36

Background

The SC Series incorporates cutting edge moisture sensing technology to prevent over watering. A timer or clock has traditionally governed automated sprinkler control systems. Day in and day out, rain or shine, these clocks faithfully water our landscapes. Because they water according to time, and not according to the level of moisture in the soil, they waste a tremendous amount of water.
The SC Series has the ability to set, maintain and monitor any desired moisture level. Each zone can be set to one of three modes of operation: as a reference zone with its own sensor, as a dependant zone that tracks a reference zone, or as a timed zone. The SC Series easily accommodates both drip zones and spray zones. Multiple zones can be watered simultaneously and Acclima's flow control optimizes the use of your water source.

The Sensor
The Acclima Digital TDT™ Moisture Sensor represents a revolutionary advance in the irrigation industry. It is the first moisture sensor to incorporate the accuracy of digitized Time Domain Reflectometry in a low-cost instrument, providing highly accurate absolute readings of soil moisture under all conditions of temperature and soil chemistry under which turf will grow. No other sensor on the market matches its accuracy and stability. Independent test data from the Center for Irrigation Technologies verifies this extraordinary claim and is available upon request.
The sensor acts like an in-ground, closed-loop evapo-transpiration (ET) weather station. All environmental variables, including wind, temperature, precipitation, humidity, soil type, and plant growth are integrated into the output of the moisture sensor.

Water Savings
Installing an Acclima Precision Irrigation System will result in water savings of between 30% and up to 50%. Some of our customers have experienced payback periods as short as 3.8 months! And with the patented Acclima system, your landscaping will look great. Many of our customers report that their properties have never looked better.

No Hassle Operation
Tired of resetting your clocks for different climatic conditions? With the Acclima Precision Irrigation System, you can forget about the clock. Once the moisture levels are set, the system self-corrects for changes in conditions. During the hottest part of the year, the system might water every day. Then when the temperature cools, or you get a big rainstorm, the system will hold off watering until the moisture level in the ground falls below the threshold you have set.

Features:

Large graphic display with text prompting simplifies programming and operation.
Optional sensor-mode operation saves water and automatically adjusts to weather patterns.
Non-volatile program memory maintains configuration information even if the power fails and the batteries are dead.
Easy installation of sensors using existing valve wires.
Conventional wiring of valves. (One wire per valve + common)
Sophisticated calendar/clock automatically compensates for leap years and optionally for daylight saving time.
Clock can be maintained for up to 2 months without power using 2-AA Alkaline batteries.
Four independent timed programs (A, B, C, D) with six start times each. Start time resolution of 1 minute.
Supports 0 to 24 or 36 soil moisture sensors with sensor sharing so multiple zones can be controlled by a single sensor.
Each soil moisture sensor added to the system also adds a sensor program to the system with 6 start times each (up to 40 programs are possible in total).
Supports rain/wind/freeze sensor inputs to shut off the water when weather does not permit irrigation.
Flow meter support monitors for broken pipes.
Multi-zone watering up to 4 zones at a time maximum.
Multi-zone watering may be configured on a per-zone based on the water usage of that zone versus available water. (Drips might run 4 zones at a time, while large zones run one or two at a time). This configuration can happen automatically when a flow meter is attached to the system, or can be adjusted manually at any time.
Watering day schedules include Custom, Every Day, Odd Day, Even Day, and Every Nth Day watering (where N may range from 3 to 31).
Zone stacking ensures that all zones will eventually be watered even though program start times may overlap.
Soil moisture sensor thresholds can be set from 0% to 99% water content per unit volume (Volumetric Water Content [VWC]). Sensor program start is inhibited for sensors where the moisture content is above the threshold.
Cycle + Soak feature prevents runoff by putting down the water in short bursts. Cycle + Soak is configurable independently for each zone. While one zone is soaking, others will water, maximizing water output for the irrigation time allowed.
Programmable valve delay allows slow-closing valves time to turn off completely.
Valve current test mode rapidly checks the valve current for each of the 36 zones.
Walk-around test mode operates each zone for a programmable amount of time for inspecting sprinkler heads after mowing the lawn.
Pause mode allows suspending controller operation for a period of time, after which irrigation will resume automatically from where it left off.
Up to 6 programmable pause events allow scheduling of lawn parties in advance. Pause events may be scheduled to any future date and time, and will automatically pause the controller for a programmable time period.
Power recovery mode can be set to recover lost watering or reset watering after a power failure. Recover watering will resume watering that should have occurred while the power was out, while reset watering prevents watering during a time that may be against community ordinances.
Water Budget is programmable between 5-500% per month. Water budget does not apply to sensor programs, as sensors adjust for seasonal changes automatically.
Rain delay is programmable from 0-14 days for timed programs (A, B, C, D). Rain delay does not apply to sensor programs, as sensors will hold off watering automatically while the soil moisture is above the programmed threshold.
24 or 36 Zones, run-time can be set from 0 to 18 hours in 1-minute increments
Zones may be quickly disabled without loosing other configuration information.
Manual zone start and manual program start
Master Valve terminal always operates for each zone
Separate Pump start terminal is programmable by zone.
Status reporting lists history of errors that may have occurred on the system
Operational status report shows current zones watering, and all zones waiting to water.
Durable, plastic box is easy to mount and is weather resistant for outdoor installation.
Adaptable to the TRC Commander radio though a separate DCI adapter.
Electrical Specifications:

Input:
115 VAC +/- 10%, 60Hz

Output:
24VAC, 2.0A
Over-current detector automatically detects loads exceeding 2.1 Amps RMS
Over-load backup fuse: Slow-blow, self-healing fuse: 2.5 Amps

Battery Backup:
Use 2-AA alkaline batteries to power the internal clock. Battery life is approximately 2 months of continuous operation without power. For continuous uninterrupted operation, replacing the batteries every year is recommended. Battery failure affect the internal clock only, other configuration information is non-volatile.
Load Capacity per terminal:
0.6 Amps max continuous load (2 solenoids/valves/relays per terminal max)

Maximum operating load:
4 zones simultaneous watering + Master Valve + Pump Start (6 Valves)
System self-limits to prevent turning on additional valves when the current load exceeds 1.25 Amps total.

Electrical Surge Protection:
Input: Transient voltage Suppressor (TVS)
Common Wires, Signal Ground: 5000 Amp Gas Discharge Tube to Earth Ground
Each Terminal: Metal Oxide Varistor (MOV)
Earth Ground Terminal: Up to #6 copper wire for diverting electrical surges to a ground rod.

Dimensions:

Width: 12 1/4" (31.0 cm)
Height: 10" (26.0 cm)
Depth: 5 7/8" (5.0 cm)

Models:

ACC-SYS-0024
ACC-SYS-0036