Panasonic S-250WX2E5 Technical Data Manual page 29

Water Heat Exchanger Unit
Reference: Water quality standard guidelines for A/C and refrigeration equipment (JRA-GL 02-1994)
Item
pH (@25ºC)
Elect. conductivity (mS/m) (@25ºC)
Chloride ions (mg/l Cl
Sulphate ions (mg/l SO
Acid consumption
(pH 4.8, mg/l CaCO
Total hardness (mg/l CaCO
Calcium hardness (mg/l CaCO
Silica ions (mg/l SiO
Iron (mg/l Fe)
Copper (mg/l Cu)
Sulfi de ions (mg/l S
Ammonium ions (mg/l NH
Residual chloride (mg/l Cl)
Free carbonate (mg/l CO
Ryznar stability index
Item
pH (@25ºC)
Elect. conductivity (mS/m) (@25ºC)
Chloride ions (Cl –
Sulphate ions (mg/l SO
Acid consumption
(pH 4.8, mg/l CaCO
Total hardness (mg/l CaCO
Calcium hardness (mg/l CaCO
Silica ions (mg/l SiO
Iron (mg/l Fe)
Copper (mg/l Cu)
Sulfi de ions (mg/l S
Ammonium ions (mg/l NH
Residual chloride (mg/l Cl)
Free carbonate (mg/l CO
Ryznar stability index
Notes
(1) Item names, term defi nitions and units are based on the JIS K 0101 standard. However, units and values
in brackets { } are common units included for reference.
(2) The ' ' symbol indicates whether an item primarily affects corrosion or scale buildup.
(3) Higher temperatures (40ºC+) accelerate corrosion, so that uncoated ferrous materials must be protected
by countermeasures such as an anti-corroding agent or anti-oxidizing treatment.
(4) In coolant systems with a closed-loop cooling tower, circulating water and its replenishment supply, and
evaporator water and its replenishment supply, depend on their respective water quality standards.
(5) The source of water and replenishment supply may be tap water, industrial water, artesian water and pure
water.
Recycled waste water and softening-processed water are excepted.
(6) The fi fteen items in the above tables are typical factors affecting corrosion and scaling buildup.
GHP Chiller TECHNICAL DATA.indb A-27 GHP Chiller TECHNICAL DATA.indb A-27
Cold water systems
(1)(6)
Circulating
Supply
20ºC or less
6.8 – 8.0 6.8 – 8.0
40 or less 30 or less
{ S/cm} (@25ºC) (1) {400 or less} {300 or less}
–
) 50 or less 50 or less
2–
) 50 or less 50 or less
4
50 or less 50 or less
)
3
) 70 or less 70 or less
3
) 50 or less 50 or less
3
) 30 or less 30 or less
2
1.0 or less 0.3 or less 1.0 or less 0.3 or less 1.0 or less 0.3 or less
1.0 or less 0.1 or less 1.0 or less 0.1 or less 1.0 or less 0.1 or less
2– ) Undetectable Undetectable Undetectable Undetectable Undetectable Undetectable
+ ) 1.0 or less 0.1 or less 0.3 or less 0.1 or less 0.1 or less 0.1 or less
4
0.3 or less 0.3 or less 0.25 or less 0.3 or less 0.1 or less 0.3 or less
) 4.0 or less 4.0 or less 0.4 or less 4.0 or less 0.4 or less 4.0 or less
2
–
Coolant systems
Circulating systems
(1)(6)
Circulating
6.5 – 8.2
80 or less
{ S/cm} (@25ºC) (1) {800 or less} {300 or less}
mg/l) 200 or less
2– ) 200 or less
4
100 or less
)
3
) 200 or less
3
) 150 or less
3
) 50 or less
2
1.0 or less 0.3 or less
0.3 or less 0.1 or less
2–
) Undetectable Undetectable Undetectable
+
) 1.0 or less 0.1 or less
4
0.3 or less 0.3 or less
) 4.0 or less 4.0 or less
2
6.0 – 7.0
6. Installation considerations
Hot water systems
Lower temp. hot water High temp. hot water
systems
Circulating Circulating
Supply
20 to 60ºC 60 to 90ºC
7.0 – 8.0 7.0 – 8.0 7.0 – 8.0
30 or less 30 or less 30 or less
{300 or less} {300 or less} {300 or less}
50 or less 50 or less 30 or less
50 or less 50 or less 30 or less
50 or less 50 or less 50 or less
70 or less 70 or less 70 or less
50 or less 50 or less 50 or less
30 or less 30 or less 30 or less
– – –
(4)
Tendency
Flow-thru
systems
Flow-thru
Supply Corrosion
water
6.0 – 8.0 6.8 – 8.0
30 or less 40 or less
{400 or less}
50 or less 50 or less
50 or less 50 or less
50 or less 50 or less
70 or less 70 or less
50 or less 50 or less
30 or less 30 or less
1.0 or less
1.0 or less
1.0 or less
0.3 or less
4.0 or less
– –
A-27
(3)
Tendency (2)
systems
Scaling
Supply Corrosion
buildup
7.0 – 8.0
30 or less
{300 or less}
30 or less
30 or less
50 or less
70 or less
50 or less
30 or less
– –
(2)
Scaling
buildup
2012/04/06 13:42:07 2012/04/06 13:42:07