NEW INSTALL

[madmark]

BEEN A WHILE FOR INSTALLATIONS BUT I AM HELPING AN ELECTRICIAN FRIEND SO HERE GOES.. 3.5 TON FRIGIDAIRE (SCROLL) - 10 SEER, WITH A 4 TON AHU. 3/8 LIQUID LINE - 3/4 SUCTION LINE ON BOTH UNITS. LINESET WILL BE APPROX. 50 FEET. 20 OF IT WILL BE THE VERTICAL RISE TO THE ATTIC. SUPPLIER GIVES ME A 7/8 LINESET WITH REDUCER COUPLINGS AND TELLS ME IT IS REQUIRED. DONE A LOT OF THESE TYPE OF INSTALLATIONS YEARS AGO WITH RECIP TYPE COMPRESSORS. NEVER INCREASED SUCTION LINE UNTIL AFTER 50" OF RUN. AM I MISSING SOMETHING OR IS THE SUPPLIER GETTING TOO INVOLVED? BEEN READING THE SITE FOR A WHILE, FIRST RATE STUFF SO FAR AS I CAN SEE.
MY FIRST POST, SO PLEASE BE PATIENT IF I EXCLUDED SOMETHING.

[BaldLoonie]

First thing to do is check what the manual says. From what I see online, the supplier is correct, for that line length, use 7/8" suction line and reducers at the fittings.

PS, don't use all caps!

[Jultzya]

First post, been reading the group for a while, yet uses all caps! :rolleyes:

[madmark]

Thanks for the reply,didn't pick up on the CAPS thing though...

[joeoilman]

nordyne 1-800-422-4328 at the prompt for tech service press 2