A residential heat pump is listed for use with a specified low-voltage control transformer. Inspection confirms that this required component is missing and no approved alternative has been established. Under 2024 IRC M1302.1, how should the inspector assess the installation?
- ARequire a different heating technology in every case
- Require conformity with the listed application before approving this installation
- CApprove it because all heat pumps can operate without transformers
- DAllow operation for a universal 30-day correction period
Where to look it up
https://shop.iccsafe.org/media/wysiwyg/material/3110S242-Sample.pdf
Why B is correct
M1302.1 ties appliance approval to its listed application unless an alternative is approved under R104.2.2. The stated missing component prevents approval on that basis. This does not mean every heat pump needs the same transformer or establish a 30-day grace period. See printed p.13-2. Source: ICC, 2024 IRC Code and Commentary Vol.2 public sample, https://shop.iccsafe.org/media/wysiwyg/material/3110S242-Sample.pdf