Johnson Controls York YHAU-C - Page 165

6. The 15 items previously shown are representative factors in corrosion and scale
formation.
Note: The manufacturer suggests the installation of expansion joints for the chilled water and
cooling water connections.
Figure 72: Chilled water and cooling water system
Table 33: Steam drain quality control
Component Standard value
PH 7.5 ~ 8.5
Cl
-
(ppm)
≤ 20
SO
4
2-
(ppm)
≤ 10
H
2
S (ppm)
nil
DO (ppm) ≤ 0.5
All carbonate (ppm) ≤ 20
163YHAU-C Single Effect Steam-Fired Absorption Chiller