Cloward H2O

Cloward H2O, an expert in aquatic design, has shared some key information for those looking to choose the right water feature control system for their latest project. All aquatic systems need some type of control to automate portions of the system, like water level, temperature, filter operation, and water chemistry, but there are many different options and levels of complexity. Control systems can range from simple equipment interlocks to pre-packaged control systems, or full custom controls.

Firstly, stand-alone pools or water features that don’t require a lot of automation are best suited for the simple interlock control technique. This is sometimes referred to as “relay logic”, and does not call for any computerised or programmable logic controllers (PLCs).

“This approach ensures that various elements of the system cannot operate without the primary systems functioning by utilizing auxiliary contacts on the treatment pump or other equipment to power or enable those functions,” explains Rob Cloward, project manager and senior engineer at Cloward H2O.

Simple interlock control strategies are fairly inexpensive and easy to install, as well as being simple to troubleshoot and maintain. On the other hand, they are limited in capability and are not ideal for more complex functions, like implementing functional changes to the system, data log operation records, or sending alert notifications to operators in the event of a fault condition.

There are several packaged control systems available off the shelf that are appropriate for running aquatic systems. Onboard controllers for a particular piece of equipment that may connect to and control other common components are a common example of packaged controls. This particular controller is frequently seen in conjunction with specific Filter Control Panels and Chemical Controllers.

“In addition to controlling the filter or chemical feed, these controllers often have the ability to control treatment pumps, booster or feature pumps, water temperature, etc.,” says Rob Cloward. “Some can also be configured to send text/email/phone alerts to operators in the event of a system fault.

“The challenge with these on-board, pre-packaged units is that they too are limited in functionality and may only successfully control a portion of the overall system, especially if that system has multiple complexities. These limitations can sometimes be overcome by creating a hybrid control system using both onboard controls and simple interlocks. The customer and technical support of these systems is often very good.”

Some commercially available control systems are more of an add-on given by the manufacturer intended to easily connect to and control their equipment with the potential to additionally interface with other system components. These off-the-shelf controls can be highly configurable. They can store operational history for troubleshooting purposes and they may also be remotely accessed by a smartphone, tablet, or another device. They can provide automated operator alerts, and come with excellent customer and technical support.

Custom controls (pictured, top) can be configured to do just about anything, monitoring and controlling an unlimited number of pumps, filters, valves, heaters, lights, blowers, and many other types of equipment, based on parameters like pressure, flow, temperature or time. These systems can retain operator and service records, give operator alerts, enable remote connection, suggest remedial action and maintenance, and record operational data. The options are, essentially, limitless.

However, Rob Cloward adds:

“These systems can also be very expensive. Depending on the features, level of control, and functionality, the costs for these systems can range from several thousands of dollars to several hundred thousands of dollars. These systems are also only as good as the person or company that builds, installs, and programmes the system. When done correctly, custom control systems can be a tremendous operations asset – reducing operation errors, identifying, and correcting potential issues before they become problems, and helping to optimise system parameters.”

Large aquatic facilities with numerous pools and features are frequently the greatest candidates for custom controls.

“The best control fit for your aquatic project depends on the types and numbers of aquatic features, and what you want the system to do,” says Rob Cloward. “Understanding what options are available along with operating expectations can help determine the best path forward.

“While a good control system can be a valuable asset to your project and facility, the control system can never replace good operators. A well-designed and constructed aquatic system, connected to an appropriate control system, operated by knowledgeable and competent operators is a recipe for success.”

Cloward H2O also recently shared its latest guidance for operators looking to incorporate splash pads into their offering.

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