Looking for advice on upgrading an old timer used to control 2 5hp water booster pumps in a 10-story building. The pumps alternate duties every 24 hours without any lead or lag in the system. The Mercroid high pressure limit switches have never tripped, running continuously year after year. Attached are a schematic, component picture, and images of the timer and alternating relay. Considering replacing the current system with a digital timer for easier functionality, possibly mounting it on the front panel door. Any suggestions on wiring, potential issues, or best practices for this task are appreciated. Any thoughts from experienced contributors on this site would be valuable. Thank you.
I believe this image of a reliable timer could serve as a suitable replacement.
The device shown in the second post is actually a timeclock, which is commonly used in home heating systems. You should be able to find an affordable one easily. Just make sure to check the relay coil rating and send a short changeover pulse to avoid any potential issues.
Hi Bryan, when you mentioned the relay coil rating in the new timer, were you referring to ensuring it can handle the load? Can you elaborate on the importance of sending a short changeover pulse as you mentioned? Thanks, Joe.
Are replacement parts readily available for time of day timers used in water heaters and pool pumps? While the current design is easy to troubleshoot and maintain, it may be worth considering using a standard relay with one Normally Open (NO) and one Normally Closed (NC) contact as a replacement. This alternative may not be as user-friendly, but it is important to understand all available options before making a decision.
Hello, I am referring to the coil within the current relay, which switches over when it receives a pulse from the timeclock/timeswitch. Some relays may not be designed for continuous use at 100% duty cycle, so applying power to the coil for an extended period can cause it to overheat and fail. To determine the specifications of the relay, it is advisable to obtain the part number and refer to the datasheet. It is important to consider this factor when selecting a timeclock/timeswitch. Unfortunately, I am unable to recommend a specific model for you as there are differences in electrical systems between regions.
It's great to hear you're looking to upgrade your system! A digital timer can definitely add convenience and precision to your setup. Just ensure that the new timer can handle the load of the pumps adequately and has a reliable relay or output for alternating them. When wiring, double-check the voltage ratings and consider using terminal blocks for a cleaner and safer setup. It might also be worthwhile to explore adding some basic fault monitoring to catch issues early, especially given the high-pressure environment. Always remember to follow local codes and regulations during installation to keep everything compliant and safe. Good luck with the upgrade!
Upgrading your old timer to a digital model sounds like a smart move, especially for enhanced functionality and ease of use. When wiring the new timer, make sure to double-check your connections, as digital timers can have different requirements compared to older analog ones. It might also be a good idea to install a surge protector to safeguard your new components from any voltage spikes. Additionally, implementing a test or diagnostics feature could help catch any potential issues before they affect your system. If you're mounting it on the front panel, ensure it's easily accessible but still protected from moisture or dust. Good luck with your upgrade!
Upgrading to a digital timer sounds like a great move for enhanced functionality! Just make sure to thoroughly check the specifications of the new timer to ensure it can handle the load from both pumps and any potential inrush current. When wiring, label everything clearly as it’ll make troubleshooting much easier down the line. It might also be worth considering a timer with a built-in automated test function to ensure the pumps are running properly each cycle. Lastly, since you’ve had such a reliable setup before, just keep an eye out for any system anomalies after the upgrade; it’s always good to monitor the first few cycles closely. Good luck with the installation!
It sounds like you have a solid setup, but upgrading to a digital timer could definitely enhance control and flexibility. When you do make the switch, be sure to check the compatibility of the new timer with your existing relay; sometimes, slight differences in switching times could affect pump operation. It might also be worth considering a timer with programmable settings to better manage peak hours or maintenance intervals. Just ensure that all connections are secured and properly waterproofed, especially with the high-pressure nature of your setup. Good luck with the upgrade!
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Answer: - When upgrading to a digital timer, consider factors such as compatibility with existing components, wiring requirements, mounting options, and ease of programming for efficient operation.
Answer: - Ensure you follow the manufacturer's instructions for wiring the digital timer correctly, disconnecting power before installation, labeling wires for easy identification, and testing the system thoroughly after installation.
Answer: - Potential issues may include compatibility issues with existing components, incorrect wiring leading to system malfunctions, programming errors, and the need for proper calibration and testing to ensure smooth operation.
Answer: - Best practices include thorough planning and research before the upgrade, consulting with experienced professionals if needed, documenting the existing system configuration, conducting proper testing and commissioning after installation, and ensuring safety measures are in place during the upgrade process.
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