kW is the unit for cooling capacity, L is the unit for (G)
Comfortable type air conditioner
G= cooling capacity×2.6L
Process type cooling
G= cooling capacity×7.4L
In certain occasion (especially in manufacture
cooling process), for conforming the system water
content requirement, it’s necessary to mount a tank
equipping with a cut-off baffle at the system to avoid
water short-circuit, Please see the following schemes:
Error
Recommendation
Error
Recommendation
Minimum chilled water flow
The minimum chilled water flow is shown in the below table.
If the system flow is less than the minimum unit flow rate
the evaporator flow can be recalculated, as shown
in the diagram.
DESIGN OF THE STORE TANK IN THE SYSTEM
minimum water flow volume in the formula.
CHILLER WATER FLOW
Evaporator
Recirculation
For minimum chilled water flow rate
Maximum chilled water flow
The maximum chilled water flow is limited by the permitted
pressure drop in the evaporator. It is provided in the below
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
Evaporator
Recirculation
Minimum and maximum water flow rates
Item
Water flow rate(m
3
/h)
Model
1.54
1.72 2.11
1.93 2.36
2.24 2.73
1.89
Minimum
Maximum
16kW
may cause much sediment, such as furring, sand, and so on.
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;
dness of chilled water is too high, furring may occur easily,
Therefore, the quality of chilled
analyzed before being used, such as PH value,
conductivity, concentration of chloride ion, concentration of
sulfide ion, and so on.
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,
Therefore, well water or river must be filtered and softening
if har
and the devices may be corroded.
water should be
PH
Total hardness
Electrical conductivity
less than 200 mV/cm (25
C)
Sulfide ion
Chlorine ion
Ammonia ion
Sulfate ion
Silicon
Total iron
Sodium ion
Calcium ion
PH
6 - 8
less than 50 ppm
none
less than 50 ppm
none
less than 50 ppm
less than 30 ppm
less than 0.3 ppm
No requirement
less than 50 ppm
table.
-
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
-
When water begins to leak out of the terminal air vent valves,
close pressure gauge indicates a pressure of 1.5 bars.
the unit.
FILLING THE INSTALLATION
EMPTYING THE INSTALLATION
-
Before emptying, place the mains switch in the
Ŷ
off
ŷ
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.
8
14kW
10kW
12kW
