I NEED A MANUAL TO ORDER PARTS FOR 15 UNITS OF TRANE CENTRAL CONDITIONING SYSTEMS. THEY ARE ALL THE SAME MODEL AND I NEED A MANUAL TO ORDER THE PARTS FROM THE STATES. THE MODEL OF THE UNITS IS T_. THE PRODUCT IS ROOFTOP A/C-LT.COMM.SZ WITH SEQUENCE 1C IF I COULD GET INFO ON HOW I CAN PULL A MANUAL FROM ONLINE TO REQUEST THE PARTS IT WOULD BE A BIG HELP