CAUTION
CAUTION
CAUTION
6
6.9 Size and position of connections
Model
36/60 Btus
6.8 Emptying the installation
A (mm)
300
B (mm)
195
C (mm)
155
D (mm)
E (mm)
F (mm)
Water inlet/outlet (Ø)
Auto-water replenishing (Ø)
Security discharge
(Ø)
F
water outlet
auto-water
replenishing orifice
security discharge
water inlet
105
68
105
R5/4
G1/2
G1/2
An all-pole disconnection device which has at least 3mm
separation distance in all pole and a residual current device
(RCD) with the rating of above 10mA shall be incorporated in the
fixed wiring according to the national rule the appliance shall be
installed in accordance with national wiring regulations.
6.7 Filling the installation
-Before filling,check that the installation drain cock is closed.
-Open all installation and terminal air vents.
-Open the gate valves.
-Begin filling,slowly opening the water filling cock outside the unit.
-When water begins to leak out of the terminal air vent valves,
close them and continue filling until the pressure gauge indicates
a pressure of 1.5 bars.
-Before emptying,place the mains switch in the “off ” position.
-Make sure the installation fill/top-up water cock is closed.
-Open the drain cock outside the unit and all the installation and
terminal air vent valves.
The installation must be filled to a pressure of between 1 and
2 bars.
It is recommended that this operation be repeated after the unit
has been operating for a number of hours.The pressure of the
installation should be checked regularly and if it drops below
1 bar,the water content should be topped-up.
Check the hydraulic tightness of joints.
If the fluid in the circuit contains anti-freeze,it should not be
allowed to drain freely as it is pollutant.It should be collected
for possible reuse.When draining after heat pump operation,
take care as the water may be hot (up to 50°).
6.4 Maximum chilled water flow
The maximum chilled water flow is limited by the permitted
pressure drop in the evaporator. It is provided in the table 6-1
If the system flow is more than the maximum unit flow rate,
bypass the evaporator as shown in the diagram to obtain a lower
evaporator flow rate.
For maximum chilled water flow rate
6.5 Minimum and Maximum water flow rates
Evaporator
Recirculation
Table 6-1
Water flow rate(m
3
/h)
Maximum
Minimum
Item
Model
IMCH-036KC-3
IMCH-060KC-3
2.63
3.22
1.89
1.54
6.6 Water quality control
When industrial water is used as chilled water, little furring may
occur; however, well water or river water, used as chilled water,
may cause much sediment, such as furring, sand, and so on.
Therefore, well water or river water must be filtered and softened
in softening water equipment before flowing into chilled water
system. If sand and clay settle in the evaporator, circulation of
chilled water may be blocked, and thus leading to freezing
accidents; if hardness of chilled water is too high, furring may
occur easily, and the devices may be corroded. Therefore, the
quality of chilled water should be analyzed before being used,
such as PH value, conductivity, concentration of chloride ion,
concentration of sulfide ion, and so on.
<50ppm
<50ppm
<30ppm
<200
ȝ
V/cm(25ºC)
<0.3ppm
<50ppm
<50ppm
6.6.2 Applicable standard of water quality for the unit
PH value
Total hardness
Conductivity
Sulfide ion
Chloride ion
Ammonia ion
Sulfate ion
Silicon
Iron content
Sodium ion
Calcium ion
No
No
No requirement
Table 6-2
6
∫
8
6.6.1 Water quality control
Table 6-3
