Connecting The Water Circuit - Daikin HYDROCUBE EWWQ Serie Installationsanleitung

Additional water piping delivered with the unit
All additional water piping must be installed on the system according
to the piping diagram as mentioned in the operation manual. The
flowswitch must be connected as described on the wiring diagram.
See also chapter "Before starting" on page 4.
Carton box 1 water piping evaporator
2x Ball valve
1x Water filter
1x Air purge
1x T-joint for air purge
2x Flowswitch pipe
1x Flowswitch
+
1x T-joint
Carton box 2 water piping condenser
2x Ball valve
1x Water filter
1x Air purge
1x T-joint for air purge
1 The flowswitch must be installed in the water outlet pipe of the
evaporator to prevent the unit from operating at a water flow
which is too low.
It is very important to install the flowswitch as shown in the
figure. Observe the position of the flowswitch in relation to
the direction of the water flow. If the flowswitch is mounted
in an other position, the unit is not protected properly
against freezing.
A terminal (X65A) is provided in the switch box for the electrical
connection of the flowswitch (S10L).
2 Shut-off valves must be installed at the unit so that normal
servicing of the water filter can be accomplished without draining
the complete system.
3 Air purge valves must be provided at all high points of the
system. The vents should be located at points which are easily
accessible for servicing.
4 The water filter must be installed in front of the unit for removing
dirt from the water to prevent damage to the unit or blockage of
the evaporator or condenser. The water filter must be cleaned on
a regular base.
EWWQ014~064KBW1N
Packaged water-cooled water chillers
D-EIMHP00908-17EU
W
ATER QUALITY SPECIFICATIONS
evaporator water
circulating
water
[<20°C]
Items to be controlled
pH at 25°C 6.8~8.0
Electrical [mS/m]
<40
conductivity at 25°C
–
Chloride ion <50
[mg Cl /l]
2–
Sulfate ion <50
[mg SO /l]
4
M-alkalinity
[mg CaCO /l]
<50
3
(pH 4.8)
[mg CaCO /l]
Total hardness <70
3
Calcium
[mg CaCO /l]
<50
3
hardness
[mg SiO /l]
Silica ion <30
2
Items to be referred to
Iron [mg Fe/l] <1.0
Copper [mg Cu/l] <1.0
2–
Sulfide ion
[mg S /l]
+
Ammonium ion <1.0
[mg NH /l]
4
Remaining
[mg Cl/l] <0.3
chloride
[mg CO /l]
Free carbide <4.0
2
Stability index —
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.
Use a good thread sealant for the sealing of the
connections. The sealing must be able to withstand the
pressures and temperatures of the system, it must also
be resistant to the used glycol in the water.
The exterior of the water pipes must be adequately
protected against corrosion.
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.
Minimum
water volume (l)
EWWQ014 62
EWWQ025 134
EWWQ033 155
EWWQ049 205
EWWQ064 311
condenser water
circulating
tendency
water
supply supply if out of
water [20°C~60°C] water criteria
6.8~8.0 7.0~8.0 7.0~8.0 A + B
<30 <30 <30 A + B
<50 <50 <50 A
<50 <50 <50 A
<50 <50 <50 B
<70 <70 <70 B
<50 <50 <50 B
<30 <30 <30 B
<0.3 <1.0 <0.3 A + B
<0.1 <1.0 <0.1 A
not detectable A
<0.1 <0.3 <0.1 A
<0.3 <0.25 <0.3 A
<4.0 <0.4 <4.0 A
— — — A + B
Minimum Maximum
water flow water flow
31 l/min 75 l/min
53 l/min 123 l/min
76 l/min 186 l/min
101 l/min 247 l/min
152 l/min 373 l/min
Installation manual
3