Hydroquip Reference Chart.

Identifying your requirements is easy with Hydroquip ? all information can be found by locating the label (found in the position below), from this you will be able to glean the following information:

Order code: This is the product number
Model: A breakdown of the unit
Serial Number: Product ID and date manufactured
Code: Diagram number of the unit

From this, access http://www.hotwatercontrols.com/doc.search.html using the highlighted information above to find the correct diagram ? be careful to enter the correct date as this ensures you are viewing the correct PCB revision.

*Do not support fiber optics

** Packs manufactured prior to 2003 will require new a temp sensor (34-0203D), hi limit (34-0201D) and a new transformer kit (48-0099)