EWWQ049~06 ECB2+3MUBW
Packaged water-cooled water chillers
D-EIMHP01008-17EU
Installation manual
3
W
ATER
QUALITY
SPECIFICATIONS
A = corrosion
B = scale
C
ONNECTING
THE
WATER
CIRCUIT
The evaporator and condenser are foreseen of GAS male pipe thread
for the water inlet and outlet (refer to the outlook diagram).
Evaporator and condenser water connections are to be made in
accordance with the outlook diagram, respecting the water in- and
outlet.
If air, moisture or dust gets in the water circuit, problems may occur.
Therefore, always take into account the following when connecting
the water circuit:
1.
Use clean pipes only.
2.
Hold the pipe end downwards when removing burrs.
3.
Cover the pipe end when inserting it through a wall so that no dust
and dirt enter.
W
ATER
CHARGE
,
FLOW
AND
QUALITY
To assure proper operation of the unit a minimum water volume is
required in the system and the water flow through the evaporator
must be within the operation range as specified in the table below.
P
IPING
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).
F
IELD
WIRING
Installing the control box (ECB*MUBW)
Follow instructions in "
" (98~192) at the very end of this manual
when installing the control box into the unit.
Parts table
F1,2,3U .................. Main fuses for the unit
H1P........................ Indication lamp alarm
H3P........................ Indication lamp operation compressor
PE .......................... Main earth terminal
S7S ........................ Remote cooling/heating change-over valve
S9S ........................ Remote start/stop switch
S10L ...................... Flowswitch
S11L ...................... Contact that closes if the pump is working
S12S ...................... 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.
evaporator water
condenser water
circulating
water
[<20°C]
supply
water
circulating
water
[20°C~60°C]
supply
water
tendency
if out of
criteria
Items to be controlled
pH
at 25°C
6.8~8.0
6.8~8.0
7.0~8.0
7.0~8.0
A + B
Electrical
conductivity
[mS/m]
at 25°C
<40
<30
<30
<30
A + B
Chloride ion
[mg Cl
–
/l]
<50
<50
<50
<50
A
Sulfate ion
[mg SO
4
2–
/l]
<50
<50
<50
<50
A
M-alkalinity
(pH 4.8)
[mg CaCO
3
/l]
<50
<50
<50
<50
B
Total hardness
[mg CaCO
3
/l]
<70
<70
<70
<70
B
Calcium
hardness
[mg CaCO
3
/l]
<50
<50
<50
<50
B
Silica ion
[mg SiO
2
/l]
<30
<30
<30
<30
B
Items to be referred to
Iron
[mg Fe/l]
<1.0
<0.3
<1.0
<0.3
A + B
Copper
[mg Cu/l]
<1.0
<0.1
<1.0
<0.1
A
Sulfide ion
[mg S
2–
/l]
not detectable
A
Ammonium ion
[mg NH
4
+
/l]
<1.0
<0.1
<0.3
<0.1
A
Remaining
chloride
[mg Cl/l]
<0.3
<0.3
<0.25
<0.3
A
Free carbide
[mg CO
2
/l]
<4.0
<4.0
<0.4
<4.0
A
Stability index
—
—
—
—
A + B
Minimum
water volume (l)
Minimum
water flow (l/min)
Maximum
water flow (l/min)
2 x EWWQ049KAW1M
205
202
494
1 x EWWQ049KAW1M
+ 1 x EWWQ064KAW1M
268
253
620
2 x EWWQ064KAW1M
311
304
746
3 x EWWQ049KAW1M
205
303
741
2 x EWWQ049KAW1M
+ 1 x EWWQ064KAW1M
238
354
867
1 x EWWQ049KAW1M
+ 2 x EWWQ064KAW1M
238
405
993
3 x EWWQ064KAW1M
311
456
1119
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.
All field wiring and components must be installed by a
licensed electrician and must comply 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.
Switch off the main isolator switch before making any
connections (switch off the circuit breaker, remove or
switch off the fuses).
