Originally Posted By: jpeck
This post was automatically imported from our archived forum.
Manufacturer’s installation instructions take precedence over the code. It MUST be installed to meet the manufacturer’s installation instructions. That is how it was tested, listed and labeled.
Tell your client to have the SELLER provide the installation instructions, that the installation instructions will specify EXACTLY how it is to be installed (minimum clearances from here, here, here, how high above grade minimum, be level, etc.), and, while they are looking at THAT clearance, make sure the installation MEETS ALL requirements in the installation instructions.
The seller will likely wish they never opened this can of worms.
You may lose (probably will) on that 18", but will likely win on the fact that the condenser units needs to be (whatever does not meet installation requirements). The seller will then need to make the installation meet the requirements.
I've seen one unit which required something like 'at least 12" on one side, at least 6" on one side, and 30" clearance on the service side'. Now, let's see, there are four sides with intake and coil (service is in one corner), does that mean the other side can have "no clearance" (there are only three clearances shown)? Not really, because, with the service area being on the corner, that entire corner must be free, and that covers two sides. Which leaves us with the 12" and 6" on the other two sides.