It shall use the vacuum pump of (lower than -755mmHg)high vacuum degree and large air
The vacuumizing time depends on the length of the connecting pipe, generally is 1~2 hours.
If after 2 hours vacuumizing, it cannot reach the vacuum degree below -755mmHg, it can be
If after 3 hours vacuumizing, it still cannot reach the vacuum degree below -755mmHg, check
if there is any leaking point and repair the them.
If after over 2 hours vacuumizing, the vacuum degree is below -755mmHg, close the VLand V
point and repair.
After finishing the above vacuumizing, change the vacuum pump into refrigerant pump to charge the refrigerant.
3-way valve totally closed
(Liquid side)
Indoor units
Indoor
Outdoor
Completely tightened
Completely tightened
Outdoor units
Vacuum pump
Discharging valve
3-way valve totally closed
(Gas side)
Low pressure peizometer
High pressure peizometer
Meter separator
V L VH
Flare part
Flare part
P
When the total length (L) of the two indoor units' connecting pipe is less than 5m, it is
If the connecting pipe (L) exceeds 5m, it shall charge Mg additional refrigerant per meter.
That is: Refrigerant charging amount = (L-5) x M (g)
For the unit with liquid pipe 6.35mm, M=30
For the unit with liquid pipe 9.52mm, M=65
Only in COOLING operation can charge the additional refrigerant.
When charging, the refrigerant shall be charged from the charging nozzle of low pressure vavle.
Be carefull when charging refrigerant, do not let the air mix into the system,and must charge the
7. Charging amount of refrigerant
8. Electric wiring
(1) Selection of size of power supply and interconnecting wires.
DANGER OF BODILY INJURY OR DEATH
TURN OFF ELECTRIC POWER AT CIRCUIT BREAKER OR POWER
SOURCE BEFORE MAKING ANY ELECTRIC CONNECTIONS.
GROUND CONNECTIONS MUST BE COMPLETED BEFORE MAKING
LINE VOLTAGE CONNECTIONS.
WARNING!
Precautions for Electric wiring
discharging
(over 40l/min).
When vacuumizing,
it shall be confirmed both gas and liquid side valves are closed.
vacuumized for
other 1 hour.
H on the meter
separator and stop vacuumizing. 1 hour later to confirm if the vacuum degree changes. If changes, it indicates
there is leaking point in the system. Check the leaking
unnecessary to charge
additional refrigerant.
additional
refrigerant in liquid condition.
Electric wiring work should be conducted only by authorized personnel.
Do not connect more than three wires to the terminal block. Always use round
Use copper conductor only.
Select wire sizes and circuit protection from table below. (This table shows 20 m
type crimped terminal lugs
with insulated grip on the ends of the wires.
length wires with less than
2% voltage drop.)
-180-
Installation
