I have just had a bryant gt-px split system installed. 4 ton, 2 stage compressor , 1640 ft horizontal loop at an average depth of 13 feet. The tech will be here today to do the final start up. My two main concerns are they initially said they would be replacing my existing furnace blower with a ecm blower with more cfm. Now they are telling me my existing blower should work ok. They may change out the motor to a 3/4 hp to boost cfm but in my mind this wouldn't change cfm if rpm is the same using existing blower wheel. I'm confused on this! Second, they never installed ports for pressure guages on the ground loop. Wouldn't this be important for tracking pressure drop and other things? The tech said he already tested and loop was running at 15 gpm. Not sure if I should send final payment yet or have these issues taken care of.
Any advice on these matters would be very helpful. Thanks!