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HYDRAULIC CIRCUIT
12 HYDRAULIC CIRCUIT
12.1.GENERAL NOTES
¡
When Piping Connections are performed:
1. Connect all pipes as close as possible to the unit, so that
disconnection can be easily performed when required.
2. It is recommended to use flexible joints for the piping of
water inlet and outlet, so vibration will not be transmitted.
3. Whenever possible, sluice valves should be installed for
water piping, in order to minimise flow resistance and to
maintain sufficient water flow.
4. Proper inspection should be performed to check
for leaking parts inside and outside the system, by
completely opening the hot water inlet and outlet valves
to the water condenser. Additionally, install equip valves
to the inlet and outlet piping.
5. This unit is equipped with an air purge at the highest
position of the water system. If this position is not the
highest one within the whole water installation, equip
another air purge. Also, equip a drain cock on the outlet
piping. The cock handle should be removed so that the
cock can not be opened under normal circumstances. If
this cock is opened during operation, trouble will occur
due to water blow-off.
6. When necessary, put insulation on the pipes in order to
avoid heat losses.
7. When the unit is stopped during shutdown periods and
the ambient temperature is very low, it is possible that
the water in the pipes and in the circulating pump freeze,
thus damaging the pipes and the water pump. In order
to prevent this, during shutdown periods it is useful to
empty the water from the installation.
NOTE:
Apply a check valve in the water supply connection "A" to
provent backsiphonage of water system into the water main
(factory supplied).
Item
Standard Quality pH (25 °C)
Electrical Conductivity (mS/m) (25°C)
{µS/cm} (25 °C)
(2)
Chlorine Ion (mg CI¯/I)
Sulphur Acid Ion (mg SO
¯/I)
2
4
The Amount of Acid Consumption (pH 4.8) (mg CaCO
Total Hardness (mg CaCO
/I)
3
Calcium Hardness (mg CaCO
3
Silica L (mg SIO
/I)
2
Reference Quality
Total Iron (mg Fe/I)
Total Copper (mg Cu/I)
Sulphur Ion (mg S
¯/I)
2
Ammonium Ion (mg NH
/I)
+
4
Remaining Chlorine (mg CI/I)
Floating Carbonic Acid (mg CO
Index of Stability
NOTE:
The mark " " in the table means the factor concerned with the tendency of corrosion or deposits of scales.
(1)
(2)
The value showed in "
PMML138A_R1-eng-fre.indb 31
/I)
3
/I)
/I)
2
" are for reference only according to the former unit.
{}
12.2.PIPING SYSTEM
¡
Piping Location
43
276
¡
Piping Connection:
Water outlet
(1'')
Security Valve
Water Supply
CAUTION:
The quality of the water that you need is the standard water
without any material that can cause damage inside the
piping system.
Chilled Water System
Circulating Water
Supply Water
(20 C Less than)
6.8 ~ 8.0
6.8 ~ 8.0
Less than 40
Less than 30
Less than 400
Less than 300
Less than 50
Less than 50
Less than 50
Less than 50
Less than 50
Less than 50
Less than 70
Less than 70
Less than 50
Less than 50
Less than 30
Less than 30
Less than 1.0
Less than 0.3
Less than 1.0
Less than 0.1
It shall not be detected.
Less than 1.0
Less than 0.1
Less than 0.3
Less than 0.3
Less than 4.0
Less than 4.0
6.8 ~ 8.0
PMML0138A-rev.1 - 11/2009
43
276
Water inlet
(1'')
(3/4'')
Tendency
Deposits of
Corrosion
Scales
-
31
(1)
19/11/2009 14:45:47
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