Multiplex Piping

HI GUYS JUST CURIOUS

I HAVE A MEDIUM TEMP MULTIPLEX ON R22 USING SIX BLOWERS IN A DROP TEMP ROOM EVAPORATING @ O DEGREES C THE BLOWERS ARE SPACED SIX METERS APART AND THE LAST BLOWER IS 50 METERS AWAY FROM THE PLEX the system capacity is 150kw @0 evap what i want to know is do i run a suction and liquid header all the way to the last blower that can handle the full load or can i reducu accordingly as i get closer to the blowers

After every blower you ca reduce your lines according to the capacities that can pass through the lines.
You also can leave the liquid line in the original big size but it will cost you more refrigerant.
Especially the oil return must sized properly.
But you're evaporating at 0°C on R33, so this will not give you many problems . Slope suction towards the compressors anyhow.