Expansion
Vessel
12
Pre
Pressure Checking
[Lower limit water volume of the system]
Please ensure the capacity of the circulating water of
the total system including the capacity of the indoor
unit is more than 50 L.
If the water capacity is insufficient, during deice
operation, the water temperature is lowered and the
water will freeze in the system's component leading to
product failure.
[Upper limit water volume of the system]
The indoor unit has a build-in Expansion Vessel with
10 L air capacity and initial pressure of 1 bar.
Total amount of water in the system should be below
260 L.
If the total amount of water is more than 260 L, please
add expansion vessel (field supply).
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>
: Water expansion rate 5 60
˚
C = 0.0171
P
1
: Expansion tank
fi
lling pressure = (100) kPa
P
2
: System maximum pressure
= 300 kPa
V =
x
Vo
1 -
98 +
P
1
98 +
P
2
з
з
( ) 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.
Water expansion rate table
Water temperature (°C)
Water expansion rate
з
10 0.0003
20 0.0019
30 0.0044
40 0.0078
50 0.0121
60 0.0171
70 0.0228
80 0.0291
90 0.0360
[Adjustment of the initial pressure of the expansion
vessel when there is a difference in installation height]
If the height difference between the indoor 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
Check
RCCB/ELCB
Ensure the RCCB/ELCB set to “ON” condition before
check RCCB/ ELCB.
Turn on the power supply to the Indoor Unit.
This testing could only be done when power is
supplied to the Indoor Unit.
WARNING
Be careful not to touch parts other than RCCB/ELCB test button
when the power is supplied to Indoor Unit. Else, electrical shock
may happen. Before obtaining access to terminals, all supply
circuits must be disconnected.
Push the “TEST” button on the RCCB/ELCB. The
lever would turn down and indicate “0”, if it
functions normal.
Contact authorized dealer if the RCCB/ELCB
malfunction.
Turn off the power supply to the Indoor Unit.
If RCCB/ELCB functions normal, set the lever to
“ON” again after testing finish.
This product contains fluorinated greenhouse gasses.
Refrigerant type: R410A (GWP=2088)
Amount: 2.85 kg (5.951 ton CO
2
equivalent)
(The amount do not include the additional refrigerant
when refrigerating piping length extended. Please
refer to adhered label on outdoor unit for exact
amount of refrigerant used and actual tonnes of CO
2
equivalent.)
Test
Run
1. Fill up the Tank Unit with water. For details refer to
Tank Unit installation instruction and operation
instruction.
2. Set ON to the Indoor Unit and RCCB/ELCB. Then,
for control panel operation please refers to air-to-
water heatpump operation instruction.
3. For normal operation, pressure gauge
14
reading
should be in between 0.05 MPa and 0.3 MPa.
4. After test run, please clean the Water Filter Set
15
.
Reinstall it after finish cleaning.
Reset Overload Protector
11
Overload Protector
11
serves the safety purpose to
prevent the water over heating. When the Overload
Protector
11
trip at high water temperature, take
below steps to reset it.
1. Take out the cover.
2. Use a test pen to push the centre button gently in
order to reset the Overload Protector
11
.
3. Fix the cover to the original fixing condition.
Use test pen to push
this button for reset
Overload protector .
11
