that is my question???
why can't you use mechanical unloaders?
why must they be electric???????????
not quite sure how to answer - probably need to change compressor to the style you prefer. i would think the indv. solenoids, depending how you fire em, would give more flexibility. the 'screw' type locks you in to 9 - 10# range
Just changed a model "E" last monday, it came with a mechanical unloader even though we needed the electric ones so we just had to change the hand hole cover. Model "E" and "F" compressors are no longer made just remanufactured in Charlotte N.C.
Many times I have tried to keep the suction pressure loaders on the E-compressor, modifying the various springs on the CNT-4,and as JRINJAX stated, you would need a RA pneumatic signal to the Lil' 1/8" pipe thread
beside the adjusting slot cover nut to maintain a decent controlled temperature of CHW. If memory serves a 3psi/deg sensitivity worked quite well in the past.
Personally, anything you can do to get away from that Hi-dollar 4-stage electric thermostat furnished will be an improvement....