I recently had a new heat pump air handler (American Standard TAM7, 2 ton) installed to match a American Standard 2 ton heat pump that is about 4-5 years old. The accepted work proposal included a refrigerant dryer installed on the R-22 lines.
There were some short cuts taken by the installers and the company owner came by a few days later to resolve them. He acknowledged his installers hadn't installed the dryer but noted the existing heat pump has one inside the unit. He told me that he could add the new one (to be installed outside of the outdoor unit) the next day as it would take some time and the refrigerant lines would need to be opened.
I'm still waiting. Is this an important part? Over the long term, would it help prevent my new air handler from being damaged/life shortened? (I'm hoping that the indoor unit will outlast the heat pump, and at that time a 410A conversion would be needed.)
Does the old line dryer last forever, or does it fill with moisture or whatever it is removing?
I'm looking to know if I should ask him back to install it like he said he would. Thanks.