Hunter 526500 Replacement Part for Indoor PHC, PC, PCC, XC Series Transformers - Transformer Plug-In If you are looking to replace your Hunter wall plug transformer, the part number 526500 is the exact replacement. The older transformer was labeled as 15VAC & 9VAC = 24VAC. The new model transformer is labeled as 12VAC + 12VAC = 24VAC. Do not be confused by these labels, as this transformer is a 24-volt direct replacement for the transformer that came with the Hunter controller. This transformer can be used with all Hunter Indoor controllers including the Hunter Pro-C, XC, X-Core, SRC, or Hydrawise. Specifications: Hunter Part Number: 526500 Model: KRM-104005, WT1-57-029R or WT1-57-037R (Replaces older model # WT57-2401000AU) Input: 120VAC 60 Hz 28W Output: YEL-RED - 12VAC 1A WHT-YEL - 12VAC 1A Combined 24VAC Class 2 Power Unit Cord Length: 6 ft For Indoor Versions of Controllers Only Hunter makes just a single plug in transformer that works with all of their controllers, including older models. This transformer may not match up exactly with the specs listed on your older model, but it is a direct replacement and will work for any indoor Hunter Controller. Wiring Example: