Daikin HYDROCUBE EWWQ014KBW1N, Installation Manual, Page: 5 / 60

EWWQ014~064KBW1N
Packaged water-cooled water chillers
D-EIMHP00908-17EU
Installation manual
3
■
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.
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.
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.
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.
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
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.
evaporator water condenser water
circulating
water
supply
water
circulating
water
supply
water
tendency
if out of
criteria [<20°C] [20°C~60°C]
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
■
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.
Minimum
water volume (l)
Minimum
water flow
Maximum
water flow
EWWQ014 62 31 l/min 75 l/min
EWWQ025 134 53 l/min 123 l/min
EWWQ033 155 76 l/min 186 l/min
EWWQ049 205 101 l/min 247 l/min
EWWQ064 311 152 l/min 373 l/min