Reconfirmation
WARNING
Be sure to switch off all power supply before performing each of
the below checkings. Before obtaining access to terminals, all
supply circuits must be disconnected.
Check Water Pressure
*(0.1 MPa
= 1 bar)
Water pressure should not lower than 0.05 MPa (with
inspects the Water Pressure Gauge). If necessary add
tap water into the water circuit.
Check Pressure Relief Valve
Check for correct operation of Pressure Relief
Valve by turning on the lever to become horizontal.
If you do not hear a clacking sound (due to water
drainage), contact your local authorized dealer.
Push down the lever after finish checking.
In case the water keeps drained out from the unit,
switch off the system, and then contact your local
authorized dealer.
Expansion Vessel 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.
[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
Check
RCCB
Ensure the RCCB set to “ON” condition before check
RCCB.
Turn on the power supply to the Mono bloc unit.
This testing could only be done when power is
supplied to the Mono bloc unit.
WARNING
Be careful not to touch parts other than RCCB test button when
the power is supplied to Mono bloc unit. Else, electrical shock
may happen.
Push the “TEST” button on the RCCB. The lever
would turn down and indicate “0”, if it functions
normal.
Contact authorized dealer if the RCCB
malfunction.
Turn off the power supply to the Mono bloc unit.
If RCCB functions normal, set the lever to “ON”
again after testing finish.
This product contains fluorinated greenhouse gasses.
Refrigerant type : R410A (GWP=2088)
For WH-MDC12H6E5 & WH-MDC16H6E5
Amount : 2.1 kg (4.385 ton CO
2
equivalent)
Test
Run
1. Before test run, make sure below items have been
checked:-
o
Pipework are properly done.
o
Electric cable connecting work are properly
done.
o
Mono bloc unit is filled up with water and
trapped air is released.
2. Antifreeze agent must be added into water circuit
to prevent freezing of water when outdoor ambient
temperatures is low. Recommended antifreeze:
Propylene glycol: 40% (equivalent to -20°C)
3. Set ON to the Mono bloc unit and RCCB. Then,
for remote control operation please refers to
(Mono bloc) Air-to-Water Heatpump’s operation
instruction.
4. For normal operation, pressure gauge reading
should be in between 0.05 MPa and 0.3 MPa.
5. After test run, please clean the Water filter.
Reinstall it after finish cleaning.
Reset Overload Protector
Overload Protector serves the safety purpose to
prevent the water over heating. When the Overload
Protector 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.
3. Fix the cover to the original fixing condition.
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
Use test
pen to push
this button
for reset
Overload
protector
0
.
