Yazaki AROACE User Manual

14
WATER QUALITY
Water used in the chilled water,
cooling water, and heat medium circuits
may cause scaling and/or corrosion if not
correctly maintained within specific limits.
In some areas, the water supply may
contain minerals that cause scaling or
may be extremely soft and corrosive.
Where these conditions exist, a water
treatment company should be consulted.
If the absorption chiller is damaged as a
result of scaling, corrosion, or erosion
caused by poor water quality control, the
equipment warranty may be void. Water
quality should not exceed the following
limits:
ITEM
CHILLED
WATER
COOLING
WATER
HEAT
MEDIUM
MAKE-UP
WATER
Standard
pH (at 77°F)
6.8 - 8.0
6.5 - 8.2
7.0 – 8.0
6.8 - 8.0
Conductivity (S/cm at 77°F)
400
800
300
300
Chloride ion (Cl
-
ppm)
50
200
30
50
Sulfate ion (SO
4
2-
ppm)
50
200
30
50
M-alkalinity (CaCO
3
ppm)
50
100
50
50
Total hardness (CaCO
3
ppm)
70
200*
70
70*
Calcium hardness (CaCO
3
ppm)
50
150
50
50
Ionic silica (SiO
2
ppm)
30
50
30
30
Reference
Total iron (Fe ppm)
1.0
1.0
1.0
0.3
Copper (Cu ppm)
1.0
0.3
1.0
0.1
Sulfide ion (S
2-
ppm)
ND
ND
ND
ND
Ammonium ion (NH
4
+
ppm)
1.0
1.0
0.1
0.1
Residual chlorine (Cl ppm)
0.3
0.3
0.1
0.3
Free carbon dioxide (CO
2
ppm)
4.0
4.0
0.4
4.0
Ryzner stability index
-
6.0 - 7.0
-
-
NOTES:
1. ND (Not Detectable)
2. *Maximum total hardness of make-up water shall not exceed 70 ppm when bleed off is the only method used to control water
quality.
Table 5 – Water Quality
INSTALLATION CHECK & REQUEST FOR STARTUP
After the absorption chiller has been
installed, piped, and wired as described
in these instructions, but before any
attempt is made to start the unit, the
Yazaki Authorized Service Provider
should be advised so that the startup can
be scheduled. Complete the REQUEST
FOR STARTUP form and send it to the
ASP or to Yazaki Energy Systems, Inc.,
at least 3 weeks prior to the required
startup date.
The contractor is expected to provide
personnel to assist the ASP with final
adjustments to the system controls and
fluid flow rates as may be necessary.

Yazaki AROACE Specifications

General

Brand	Yazaki
Model	AROACE
Category	Chiller
Language	English