What should be included in my contractors bid for
There are many things to consider
when determining whether or not you are getting a good deal in regards to repairing the heating and cooling
equipment at your facility.
maintenance director you are responsible for maintaining the equipment and ensuring that your company is
getting its moneys worth on all outside contractor work.
commercial business establishments today require at least 3 bids or estimates before giving a final
authorization on repairing the problem. When it comes to major system repairs many contractors will cut corners
to get the job. Here are a few things that should be part of any estimate in regards to compressor
recovery of all existing refrigerant per EPA regulations.
Prior to the
recovery and bid, the contractor should check for acid contamination of refrigerant
old liquid line dryer core.
failed compressor. Hermetically sealed compressors should be drained of oil properly and sealed
before disposing of.
Installation of new compressor.
NOTE: If system contained any acid from
electrical or high temp failure the system should be flushed and oil of new compressor treated with
an acid neutralizer.
Installation of new
liquid line dryer. NOTE: If
system contained acid or high levels of contaminates quote/bid should allow for a return visit
after equipment has been running for another dryer change out.
Pressurize system with
dry nitrogen to test for any leaks, followed by purging with nitrogen.
be pulled per manufacturers directions to evacuate the system of non condensibles such as water.
Not all manufacturers require system to be pulled to 500microns. Some actually require much
System to be
charged with virgin refrigerant and readings recorded for your records.
if the above procedures are not included in the bid you have received you should not award the respective
contractor with the job. Continue to request estimates until you have received a contractor that is willing to
do the job right for a competitive price.
make sure to periodically check in with the service technician as work is being performed to ensure no steps
have been left out or skipped.