Kaysun Aquantia KHPS-MO Series, Инструкция по установке и эксплуатации

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CAUTION
Be careful not to deform the unit's piping by using
excessive force when connecting the piping.
Deforming the piping can cause the unit to
malfunction.
NOTE
The unit is only to be used in a closed water
system. Application in an open water circuit can
lead to excessive corrosion of the water piping:
● Never use Zn-coated parts in the water circuit.
Excessive corrosion of these parts may occur
as copper piping is used in the unit's internal
water circuit.
● When using a 3-way valve in the water circuit.
Preferably choose a ball type 3-way valve to
guarantee full separation between the domestic
hot water and floor heating water circuit.
● When using a 3-way valve or a 2-way valve in
the water circuit. The recommended maximum
changeover time of the valve should be less
than 60 seconds.
● Determine the calculated pre-pressure (Pg) for the
corresponding maximum water volume using the graph
below.
● Check that the total water volume in the entire water
circuit is lower than this value. If this is not the case,
the expansion vessel inside the unit is too small for the
installation.
0.3
0.8
1.3
1.8
2.3
2.8
20 70 120 170
P
re
ss
ur
e(
ba
r)
Maximum water volume(L)
A1
A2
Pre-pressure = pre-pressure of the expansion vessel
Maximum water volume = maximum water volume in the
system
A1 System without glycol for 1-phase 12~16 kW and
3-phase 12~16 kW unit
A2 System without glycol for the 5/7/9 kW unit
Example 1:
The unit(16kW) is installed 10m below the highest point in
the water circuit. The total water volume in the water circuit
is 50 L. In this example, no action or adjustment is required.
Example 2:
The unit(16kW) is installed at the highest point in the water
circuit. The total water volume in the water circuit is 150 L.
Result:
● Since 150 L is more than 72 L, the pre-pressure must
be decreased (see table above).
● The required pre-pressure is: Pg(bar) = (H(m)/10+0.3)
bar = (0/10+0.3) bar = 0.3 bar
● The corresponding maximum water volume can be read
from the graph: approximately 160 L.
● Since the total water volume (150 L) is below the
maximum water volume (160 L), the expansion vessel
suffices for the installation.
Setting the pre-pressure of the expansion vessel
When it is required to change the default pre-pressure of
the expansion vessel (1.5 bar), following guidelines:
● Use only dry nitrogen to set the expansion vessel pre-
pressure.
● Inappropriate setting of the expansion vessel pre-
pressure will lead to malfunctioning of the system. Pre-
pressure should only be adjusted by a licensed installer.
Selecting the additional expansion vessel
If the expansion vessel of the unit is too small for the
installation, an additional expansion vessel is needed.
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:
● Use clean pipes only.
● Hold the pipe end downwards when removing burrs.
● Cover the pipe end when inserting it through a wall
to prevent dust and dirt entering.
● Use a good thread sealant for sealing the
connections. The sealing must be able to withstand
the pressures and temperatures of the system.
● When using non-copper metallic piping, be sure to
insulate two kind of materials from each other to
prevent galvanic corrosion.
● For copper is a soft material,
use appropriate tools for
connecting the water circuit.
Inappropriate tools will cause
damage to the pipes.
● calculate the pre-pressure of the expansion vessel:
Pg(bar)=(H(m)/10+0.3) bar the expansion vessel
equipped in the unit should adjust the pre- pressure
also.
● calculate the volume needed of the additional
expansion vessel:
V1=0.0693*Vwater/(2.5-Pg)-V0
Vwater is volume of water in the system, V0 is
volume of expansion vessel which the unit is
equipped(10~16kW,V0=5L, 5~9kW,V0=2L).
9.4.3 Water circuit connection
Water connections must be made correctly in accordance
with labels on the outdoor unit, with respect to the water
inlet and water outlet.