Panasonic 1826280177, Technical Data Manual

Page: 29 / 36

A-27
Water Heat Exchanger Unit
6. Installation considerations
Reference: Water quality standard guidelines for A/C and refrigeration equipment (JRA-GL 02-1994)
Item (1)(6)
Cold water systems
Hot water systems
(3)
Tendency (2)
Lower temp. hot water
systems
High temp. hot water
systems
Circulating
20ºC or less
Supply
Circulating
20 to 60ºC
Supply
Circulating
60 to 90ºC
Supply Corrosion
Scaling
buildup
Standard Items
pH (@25ºC) 6.8 – 8.0 6.8 – 8.0 7.0 – 8.0 7.0 – 8.0 7.0 – 8.0 7.0 – 8.0
{ {
Elect. conductivity (mS/m) (@25ºC)
{ S/cm} (@25ºC) (1)
40 or less
{400 or less}
30 or less
{300 or less}
30 or less
{300 or less}
30 or less
{300 or less}
30 or less
{300 or less}
30 or less
{300 or less}
{ {
Chloride ions (mg/l Cl – ) 50 or less 50 or less 50 or less 50 or less 30 or less 30 or less
{
Sulphate ions (mg/l SO
4
2– ) 50 or less 50 or less 50 or less 50 or less 30 or less 30 or less
{
Acid consumption
(pH 4.8, mg/l CaCO
3
)
50 or less 50 or less 50 or less 50 or less 50 or less 50 or less
{
Total hardness (mg/l CaCO
3
) 70 or less 70 or less 70 or less 70 or less 70 or less 70 or less
{
Calcium hardness (mg/l CaCO
3
) 50 or less 50 or less 50 or less 50 or less 50 or less 50 or less
{
Silica ions (mg/l SiO
2
) 30 or less 30 or less 30 or less 30 or less 30 or less 30 or less
{
Ref
erence
Iron (mg/l Fe) 1.0 or less 0.3 or less 1.0 or less 0.3 or less 1.0 or less 0.3 or less
{ {
Copper (mg/l Cu) 1.0 or less 0.1 or less 1.0 or less 0.1 or less 1.0 or less 0.1 or less
{
Sulfi de ions (mg/l S 2– ) Undetectable Undetectable Undetectable Undetectable Undetectable Undetectable
{
Ammonium ions (mg/l NH
4
+ ) 1.0 or less 0.1 or less 0.3 or less 0.1 or less 0.1 or less 0.1 or less
{
Residual chloride (mg/l Cl) 0.3 or less 0.3 or less 0.25 or less 0.3 or less 0.1 or less 0.3 or less
{
Free carbonate (mg/l CO
2
) 4.0 or less 4.0 or less 0.4 or less 4.0 or less 0.4 or less 4.0 or less
{
Ryznar stability index – – – – – –
{ {
Item (1)(6)
Coolant systems (4)
Tendency
(2)
Circulating systems
Flow-thru
systems
Circulating Supply
Flow-thru
water
Corrosion
Scaling
buildup
Standard Items
pH (@25ºC) 6.5 – 8.2 6.0 – 8.0 6.8 – 8.0
{ {
Elect. conductivity (mS/m) (@25ºC)
{ S/cm} (@25ºC)
(1)
80 or less
{800 or less}
30 or less
{300 or less}
40 or less
{400 or less}
{ {
Chloride ions (Cl
–
mg/l) 200 or less 50 or less 50 or less
{
Sulphate ions (mg/l SO
4
2– ) 200 or less 50 or less 50 or less
{
Acid consumption
(pH 4.8, mg/l CaCO
3
)
100 or less 50 or less 50 or less
{
Total hardness (mg/l CaCO
3
) 200 or less 70 or less 70 or less
{
Calcium hardness (mg/l CaCO
3
) 150 or less 50 or less 50 or less
{
Silica ions (mg/l SiO
2
) 50 or less 30 or less 30 or less
{
Ref
erence
Iron (mg/l Fe) 1.0 or less 0.3 or less 1.0 or less
{ {
Copper (mg/l Cu) 0.3 or less 0.1 or less 1.0 or less
{
Sulfi de ions (mg/l S 2– ) Undetectable Undetectable Undetectable
{
Ammonium ions (mg/l NH
4
+ ) 1.0 or less 0.1 or less 1.0 or less
{
Residual chloride (mg/l Cl) 0.3 or less 0.3 or less 0.3 or less
{
Free carbonate (mg/l CO
2
) 4.0 or less 4.0 or less 4.0 or less
{
Ryznar stability index 6.0 – 7.0 – –
{ {
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 2012/04/06 13:42:07 2012/04/06 13:42:07