Johnson Controls YVAHP036B21S, Engineering Manual

Page: 56 / 94

OUTDOOR UNITS
2-38
TC-16001-rev.5
2
[Diameter of Pipe after First Branch]
Gas Liquid
5/8 (15.88) 3/8 (9.52)
3
[Diameter of Pipe between Multi-Kit and Indoor Unit]
Indoor Unit Capacity
(MBH)
Gas Liquid
6 - 15 1/2 (12.7) 1/4 (6.35) *1)
18 - 48 5/8 (15.88) 3/8 (9.52)
*1): When liquid piping length is longer than 49 ft (15m), use 3/8 inch (9.52mm) diameter piping
with the reducer (accessory pipe for Multi-Kit).
When satisfies all the following piping conditions, the diameter of the piping remains.
● Installation with one header branch.
● The pipe length between the nearest indoor unit and the farthest indoor unit from the outdoor unit is within 49 ft (15m).
1
[Main Pipe Diameter]
(Outdoor Unit to First Branch)
Outdoor Unit
Capacity
(MBH)
Equivalent Piping Length
< 328 ft (100m) > 328 ft (100m) *1)
Gas Liquid Gas Liquid
36 - 60 5/8 (15.88) 3/8 (9.52) 3/4 (19.05) 3/8 (9.52)
*1): It is required to prepare the reducer (field-supplied).
Piping Size < inch (mm) >
Refer to the figure on the previous page.
Outdoor Unit
Header Branch
Indoor
Unit
Indoor
Unit
Indoor
Unit
φ 1/4 inch ( φ 6.35mm)
φ
1/4 inch (
φ
6.35mm)
φ 1/4 inch ( φ 6.35mm)
(A)
(B)
49 ft (15m) or less
Not required to size up the liquid pipe.