Introduction
This microblog details the process of fitting a 240 V AC mains transformer to the Rachio 3 outdoor enclosure. The solution does not require a separate step-down transformer.
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| Rachio 3 Smart Controller Enclosure with 240 V AC Mains Transformer |
Details
The Rachio reticulation controller is shipped with a 110 V AC to 24 V AC transformer (adaptor). While the provided transformer alone is unsuitable in regions where the main supply grid is a different voltage, there is an alternative transformer that fits inside the Rachio weatherproof enclosure.
The 240 V AC to 24 V AC transformer is available from suppliers such as Amazon, Altronics or the BourneSuperStore.
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| PowerTran 24 V AC Transformer Plate. Altronics M 9381 |
Fitting
Disclaimer: The voltages present in this post are 240V AC. Care and steps should be taken to prevent electrocution. Wiring should only be performed by experienced persons.
The previous mains socket was removed from the Rachio outdoor enclosure to fit the alternative transformer. The socket assembly is a snap design that can be removed using a screwdriver.
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| Mains Socket from Rachio Weatherproof Enclosure |
A separate double-insulated mains cable was provided to the Rachio enclosure through a 25 mm cable gland for the mains supply.
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| Rachio Weatherproof Enclosure with Cable Gland |
The alternative transformer was supplied with a moulded mains plug. Mains termination was made by shortening the transformer cable and then connecting it to the outside mains cable. The existing section in the external enclosure was used for termination.
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| Mains Cable Termination in Rachio Weatherproof Enclosure |
The transformer was placed in the upper left corner of the enclosure.
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| Installed 240 V AC to 24 V AC Mains Transformer |
Following the installation of the alternative mains transformer, the process for wiring the Rachio controller was followed.
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| Rachio 3 Smart Controller Mounted in Weatherproof Enclosure |
