Yazaki AROACE - Water Quality; Installation Check & Request for Startup

22
WATER QUALITY
Water used in the chilled/hot water and
cooling circuits may cause scaling and/or
corrosion if not correctly analyzed and maintained
within specified 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-heater 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/
HOT W
A
TER
COOLING
WATE
R
MAKE-UP
WATER
Standard
pH (at 77°F) 6.8 - 8.0 6.5 - 8.2 6.8 - 8.0
Conductivity (µS/cm at 77°F)
400 800 300
Chloride ion (Cl
-
ppm) 50 200 50
Sulfate ion (SO
4
2-
ppm) 50 200 50
M-alkalinity (CaCO
3
ppm) 50 100 50
Total hardness (CaCO
3
ppm) 70 200* 70
Calcium hardness (CaCO
3
ppm) 50 150 50
Ionic silica (SiO
2
ppm) 30 50 30
Reference
Total iron (Fe ppm) 1.0 1.0 0.3
Copper (Cu ppm) 1.0 0.3 0.1
Sulfide ion (S
2-
ppm) ND ND ND
Ammonium ion (NH
4
+
ppm) 1.0 1.0 0.1
Residual chlorine (Cl ppm) 0.3 0.3 0.3
Free carbon dioxide (CO
2
ppm) 4.0 4.0 4.0
Ryzner stability index - 6.0 - 7.0 -
NOTES:
ND = Not Detectable
* Maximum total hardness of make-up water shall not exceed 70 ppm when bleed off is the only method used
to control water quality.
INSTALLATION CHECK & REQUEST FOR STARTUP
After the absorption chiller-heater 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 2 weeks
prior to the required startup date.
The contractor is expected to provide
personnel to assist with final adjustments to the
system controls and fluid flow rates as may be
necessary.