Gree GMV-VQ680WM/C-X Service Manual page 21

Gree
Category No.
18
19
20
21
Refrigerating
system
22
23
24
25
26
27
Electrical
28
system
29
30
Checklist Before GMV6 HR Commissioning
Item
Is the distance between an indoor
unit and the nearest branch joint
greater than 15 m? If yes, is the
diameter of a liquid pipe whose
original diameter is less than or
equal to 6.35 mm, or the diameter
of a gas pipe whose original
diameter is less than or equal to
9.52 mm be increased?
The inclination of indoor and
outdoor branch joints should not
exceed the specified requirements.
Is the stop valve of each module
open to the maximum opening?
Is the refrigerant pressure normal?
Connect the high pressure gauge of
the pressure gauge to the liquid
pipe valve of the outdoor unit,
connect the low pressure gauge to
the gas pipe valve, and read the
value.
Is there any leakage of chiller oil at
the valve?
If so, immediately check for valve
leakage with soap bubbles or a leak
detector. If leakage is confirmed,
stop subsequent commissioning at
once, and continue the work only
after the problem is solved.
Is the outdoor unit being warmed up
for more than 2 hours before
commissioning?
If the piping length from the hydro
box to the mode exchange box is
less than or equal to 10m?
Is the power cable connected
correctly? Is the terminal block
secure?
Is the power cable appearance in
good condition and not exposed?
Is the power capacity less than the
maximum power of the unit?
Is there any poorly connected
electrical component detected
when the power is off?
Do the cable diameters of the
indoor and outdoor units meet the
unit design requirements?
Do the circuit breaker and leakage
switch meet the unit design
requirements?
GMV6 HR DC Inverter VRF Units Service Manual
Reference Value
≤15 m. When the length
exceeds 10 m, the diameter
of a liquid pipe whose
original diameter is less than
or equal to 6.35 mm, or the
diameter of a gas pipe
whose original diameter is
less than or equal to 9.52
mm needs to be increased.
Branch joints need to be
installed horizontally. Refer
to branch joint installation.
—
At this time, the high and low
pressures of the system are
in balance, and the
difference between the
saturation temperature
corresponding to the
balanced pressure value and
the ambient temperature
(higher one of the indoor and
outdoor temperatures) does
not exceed 5°C. If it exceeds
5°C, check for the outdoor
unit leakage.
—
—
≤10m
—
The appearance is in good
condition and not exposed.
The power capacity is not
less than the maximum
power of the unit.
All components are reliably
connected.
Refer to electrical
installation.
Refer to electrical
installation.
19
Qualified Inspector