Installation & Commissioning Manual:  
Neos 100S, 20X, 30S, 35X, 40X, 50X 
62-11165 Rev D 
® 
9 
Evaporator Mounting Preparation – Mushroom Drilling 
From the inside of the box, drill 4 holes completely through 
the roof of the vehicle using a 7/32” (5mm) drill bit. 
From the inside of the box, step drill only through the inside 
skin of the vehicle using a ½” (12.5mm) drill bit. 
From the outside of the box, use a 7/8” (22mm) hole saw to 
drill the outer roof of the box and the insulating foam. 
Make certain NOT to drill all the way through 
the roof. The ½” (12.5mm) hole in the inside 
skin of the vehicle must remain intact. 
0.50” (12.5)