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15. Servicing Mode
15.1 Expansion Vessel
⑦
Pre
Pressure Checking
[Upper limit water volume of the system]
The Mono bloc unit has a build-in Expansion Vessel
with 10 L air capacity and initial pressure of 1 bar.
Without antifreeze agent condition
Total amount of water in the system should be below
200 L.
If the total amount of water is more than 200 L, please
add expansion vessel (field supply).
With antifreeze agent condition
In the case of using antifreeze agent, expansion rate ɛ
is different depending on its maker.
Please refer to the antifreeze agent maker for the
expansion rate ɛ before calculate the upper limit water
volume of the system.
The expansion vessel capacity required for the system
can be calculated from the formula below.
V : Required gas volume <expansion vessel volume L>
Vo : System total water volume <L>
: Expansion rate 5 60˚C = (depends on antifreeze agent used)
P
1
: Expansion tank filling pressure = (100) kPa
P
2
: System maximum pressure = 300 kPa
- ( ) Please confirm at actual place
- The gas volume of the sealed type expansion vessel is presented by <V>.
It’s advised to add 10% margin for required gas volume of calculation.
V =
x
Vo
1 -
98 +
P
1
98 +
P
2
з
з
[Adjustment of the initial pressure of the expansion
vessel when there is a difference in installation height]
If the height difference between the Mono bloc unit
and the highest point of the system water circuit (H) is
more than 7m, please adjust the initial pressure of the
expansion vessel (Pg) according to the following
formula.
Pg= (H*10+30) kPa
15.2 Maintenance
In order to ensure optimal performance of the unit,
seasonal inspections on the unit, functional check
of RCCB, field wiring and piping have to be
carried out at regular intervals. This maintenance
should be carried out by authorized dealer.
15.2.1 Maintenance for Magnetic Water
Filter Set
⑬
1. Remove the Cover
⑰
by loosening the mounting
screws to access to the Magnetic Water Filter Set
⑬
.
2. Turn OFF power supply.
3. Set the two valves for the Magnetic Water Filter
Set
⑬
to “CLOSE”.
4. Take off the clip, then gently pull out the mesh.
Beware of small amount water drain out from it.
5. Clean the mesh with warm water to remove all the
stain. Use soft brush if necessary.
6. Reinstall the mesh to the Magnetic Water Filter
Set
⑬
and set back the clip on it.
7. Set the two valves for the Magnetic Water Filter
Set
⑬
to “OPEN”.
8. Turn ON power supply.
9. After cleaning, reinstall the Cover
⑰
by tightening
the mounting screws properly.
Mounting
screws
Cover
17
WARNING
Do not add or replace other than R32 type. It may cause
product damage, burst, injury and etc. Use compatible
R32 tools for refrigerant piping work and refrigerant
charging during installation or servicing.
