Friedrich MR24DY3JMA Manuel D'installation page 12

Installation of Indoor, Outdoor Unit
Indoor unit Capacity (Btu/h class)
9, 12k
18k
CAUTION: Capacity is based on standard length and maximum allowance
length is on the basis of reliability.
12
Gas
3/8(9.52)
1/2(12.7)
A
h1
B
Multiple Piping Type
Pipe Diameter
Unit : inch(mm)
Liquid
1/4(6.35)
1/4(6.35)
h2