WATER QUALITY
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)
Table 2 WATER QUALITY REQUIREMENTS
INSTALLATION CHECK & REQUEST FOR START-UP
21
ITEM
pH (at 77
o
F)
Conductivity (µS/cm at 77
o
F)
Chloride ion (Cl
-
ppm)
Sulfate ion (SO
4
2-
ppm)
M-alkalinity (CaCO
3
ppm)
Total hardness (CaCO
3
ppm)
Calcium hardness (CaCO
3
ppm)
Ionic Silica (SiO
2
ppm)
Total iron (Fe ppm)
Copper (Cu ppm)
Sulfide ion (S
2-
ppm)
Ammonium ion (NH
4
+
ppm)
Residual chlorine (Cl ppm)
Free carbon dioxide (CO
2
ppm)
Ryzner stability index
Standar
d
Ref
erence
CHILLED/
HOT
WATER
6.8 - 8.0
400
50
50
50
70
50
30
1.0
1.0
ND
1.0
0.3
4.0
—
HEAT
MEDIUM
7.0 - 8.0
300
30
30
50
70
50
30
1.0
1.0
ND
0.1
0.1
0.4
—
COOLING
WATER
6.5 - 8.2
800
200
200
100
200*
150
50
1.0
0.3
ND
1.0
0.3
4.0
6.0 - 7.0
MAKE-UP
WATER
6.8 - 8.0
300
50
50
50
70
50
30
0.3
0.1
ND
0.1
0.3
4.0
—
Water used in the chilled/hot water, cooling
water and heat medium circuits may cause scal-
ing or corrosion if not correctly analyzed and
maintained within the limits specified in Table 2.
In some areas the water supply will contain
minerals that cause scaling or may be extremely
soft and corrosive. When 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 is
voided.
The water quality in the chilled/hot water,
cooling water, and heat medium circuits shall not
exceed the following limits:
After the absorption chiller or chiller-heater
has been installed, piped and wired as described
in these instructions, but before any attempt is
made to start the unit, the Authorized Yazaki
Service Provider should be advised so that the
start-up can be scheduled.
Complete the
INSTALLATION CHECK AND REQUEST FOR
START-UP FORM and send to the Yazaki Sales
Representative or Distributor at least 2 weeks
prior to the required start-up date.
The contractor is expected to provide person-
nel to assist with final adjustment of system con-
trols and flow rates.
