●
Do not operate the system until all the check points are cleared.
(A) Check to ensure that the electrical resistance is more than 1 megohm by measuring the
resistance between ground and the terminal block in the electrical box. If not, do not operate
the system until the electrical leakage is found and repaired.
(B) Check to ensure that the stop valves of the outdoor unit are fully opened, and then start the
system.
(C) Apply power to the outdoor unit(s) at least 12 hours prior to operation of the system for
preheating of the compressor oil.
●
Pay attention to the following items while the system is running.
(A) Do not touch any of the parts by hand at the discharge gas side, since the compressor
chamber and the pipes at the discharge side are heated higher than 90°C (194°F).
7. Test Run
Refrigerant piping and connecting wires should be connected to the same refrigerant cycle system.
If they are connected to the dissimilar refrigerant cycle systems, a malfunction may occur.
NOTICE
Perform
a
test
run
according
to
the
“Installation
and
Maintenance
Manual”
of
the
outdoor
unit.
●
Special Attention Regarding Refrigerant Gas Leakage
The refrigerant R410A is non-toxic and inflammable in its original state.
However, in consideration of a state where the refrigerant leaks into the room, measures against
refrigerant leaks must be taken in small rooms where the tolerable level could be exceeded.
Take countermeasures by installing ventilation devices,etc.
250
200
150
100
50
Range below the
density
limit of 0.42kg/m
3
(Countermeasures
Not Needed)
Range above the limit of
0.42kg/m
3
(Countermeasures Needed)
Total Quantity Charged of Refrigerant (kg)
0
10 20 30 40 50 60 70 80 90 100 110 120 130 140 150
Room Volume (m
3
)
<
Calculation
of
Refrigerant
Concentration
>
(1)
Calculate
the
total
quantity
of
refrigerant
R
(kg)
charged
in
the
system
connecting
all
the
indoor
units
of
rooms
to
be
air-conditioned.
(2)
Calculate
the
room
Volume
V
(m
3
)
of
each
room.
(3)
Calculate
the
refrigerant
concentration
C
(kg/m
3
)
of
the
room
according
to
the
following
equation.
R:
Total
Quantity
of
Charged
Refrigerant
(kg)
V:
Room
Volume
(m
3
)
=
C:
Refrigerant
Concentration
<
0.42
(kg/m
3
)
for
R410A
26
Summary of Contents for HCHM-N04X
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