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D-EIMWC01004-14EU - 8/190
volume of every individual chiller in the system.
The water quality must be in accordance with the
specifications listed the table below:
Circulating
water
Supply
water
Tendency
if out of
criteria
Items to be controlled
pH at 25°C
6.8~8.0
6.8~8.0
corrosion+
scale
Electrical
conductivity
[mS/m] at
25°C
<40
<30
corrosion+
scale
Chloride Ion
[mg Cl˜/l]
<50
<50
corrosion
Sulfate Ion
[mg SO
4
²˜/l]
<50
<50
corrosion
M-alcalinity
(pH4.8)
[mg CaCO
3
/l]
<50
<50
scale
Total hardness
[mg CaCO
3
/l]
<70
<70
scale
Calcium
hardness
[mg CaCO
3
/l]
<50
<50
scale
Silica Ion
[mg SiO
2
/l]
<30
<30
scale
Items to be referred to
Iron
[mg Fe/l]
<1,0
<0,3
corrosion+
scale
Copper
[mg Cu/l]
<1,0
<0,1
corrosion
Sulfide Ion
[mg S²˜/l]
not
detectable
not
detectable
corrosion
Ammonium
Ion
[mg NH
4
+/l]
<1,0
<0,1
corrosion
Remaining
chloride
[mg Cl/l]
<0,3
<0,3
corrosion
Free carbide
[mg CO
2
/l]
<4,0
<4,0
corrosion
Stability index
-
-
corrosion+
scale
The water pressure should not exceed the maximum
working pressure of 10 bar.
NOTE Provide adequate safeguards in the water circuit to
make sure that the water pressure will never
exceed the maximum allowable working
pressure.
PIPING INSULATION
The complete water circuit, inclusive all piping, must be
insulated to prevent condensation and reduction of the cooling
capacity.
Protect the water piping against water freezing during winter
period (e.g. by using a glycol solution or heatertape).
DISCHARGE FROM PRESSURE RELIEF DEVICES
Discharge of the refrigerant into installation area has to be in
accordance with local regulations. If required it is possible to
connect a 1” pipe to each pressure relef valve on the
condenser and ½” pipe to each pressure relief valve on the
evaporator.
Cross section and length of the discharge line must comply
with local codes.
FIELD WIRING
All field wiring and components must be installed by a
licensed electrician and must compy with relevant
European and national regulations
.
The field wiring must be carried out in accordance with
the wiring diagram supplied with the unit and the
instructions given below.
Be sure to use a dedicated power circuit. Never use a
power supply shared by another appliance.
NOTE Verify on the wiring diagram all electrical actions
mentioned below, in order to understand the operation
of the unit more deeply.
Parts table
F1,2……………………..Main fuses for the unit
L1, 2, 3………………….Main supply terminals
PE……………………… Main earth terminal
S6S……………………..Setpoint override
FS……………………… Flowswitch
Q10……………………..Main isolator switch
---………………………..Field wiring
Power circuit and cable requirements
1 The electrical power supply to the unit should be
arranged so that it can be switched on or off
independently of the electrical supply to other
items of the plant and equipment in general.
2 A power circuit must be provided for connection of
the unit. This circuit must be protected with the
required safety devices, i.e. a circuit breaker, a
slow blow fuse on each phase and an earth leak
detector. Recommended fuses are mentioned on
the wiring diagram supplied with the unit.
Switch off the main isolator switvch before making any
connections (switch off the circuit breaker, remove or
switch off the fuses).
Connection of the watercooled water chiller power
supply
1
Using the appropriate cable, connect the power
circuit to the L1, L2 and L3 terminals of the unit.
2 Connect the earth conductor (yellow/green) to the
earthing terminal PE.
