Johnson Controls YVAHP0721CW Series, Service Manual

Page: 53 / 416

SM-16007
1-39
INSTALLATION
6.5 Piping Size and Multi-Kit Selection
For selecting the pipe sizes
1
between the outdoor unit and the piping connection kit, the piping size
2
between the piping connection kits and piping connection kit
A
, refer to Section 6.4 “Piping Size between
Outdoor Units”.
B
First Branch
Outdoor Unit Capacity
(MBH)
Model
72, 96 MW-NP282A2
144 - 192 MW-NP692A2
288 MW-NP902A2
D
Header Branch
Total
Indoor Unit Capacity
(MBH)
No. of Header
Branches
Model
36 - 60 4 MH-NP224A
36 - 72 8 MH-NP288A
< Line Branch > < Header Branch >
C
Line Branch after First Branch
Total
Indoor Unit Capacity
(MBH)
Model
< 86 MW-NP282A2
87 - 125 MW-NP452A2
126 - 185 MW-NP692A2
> 186 MW-NP902A2
NOTE:
If
C “Line Branch after First Branch” is larger than B
“First Branch”, use the same model as B “First Branch”.
Multi-Kit (Optional Parts)
1 1
4
4
5 5 5
5
4
5 5
1
3
2
D
C
C
B
A
Maintain a straight-line distance of 19-11/16 inch (500mm) or more for piping after the piping connection kit.
: Gas Pipe, Liquid Pipe
A
A
Outdoor
Unit
B
Outdoor
Unit
C
Outdoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Indoor
Unit
Terminal
Indoor Unit
Indoor
Unit