Hi all new to the forum.
I belive I have posted this else where and no response. I installed a Goodman 2.5 ton unit, with the furnace 50 feet from the condenser. Installation went well, charged to factory specs, called goodman to verify the amount of r22 to go into a 50 ft line set. The lines are 3/4, 3/8. Started the unit after a good deep vacume, let it pull for an hour. Charged with the amount, started the unit and it cools fine. Now the pulsing problem. The suction line, right at the evap coil "pulses" It sort of jumps. It started pretty steady, no knowing what to do and the customer asking is that normal, i added a bit more 22. The pulsing slowed. Using my superheat/cool guage(a fieldpiece, not a plug for them just what I use to do my superheats/cools) all was okay there. So I added a bit more r22 and the pulsing slows even more, now just a random bump every couple mins or so. Could it be I have a ball of silfoss in where the dischage goes into the evap coil? I have never done such a long run of copper before, furnace was on the driveway side, so could not put condenser on that side of house. Any thoughts on what I should do next? This was last june I installed, it worked fine, hense the pulsing till september. Live in northern Canada, so residential units only run at max 5 months out of the year. I have the info on how much r22 I put in at the customers house, my record keeping seems to stay much better that way. Is there something I am over looking or is this a bigger problem?