Samsung ACH1800E Technical Manual page 44

Refrigerant Refill Procedure
3-6-2. Refrigerant Adjustment (Supplement)
Adding Refrigerant
Refrigerant must be added if the piping measures more than 5 meters in length (maximum of "A" meters). The quantity of
additional refrigerant is variable according to the installation situation. Thus, make sure the outdoor unit situation before adding
refrigerant. This operation can only be performed by a qualified refrigeration specialist.
☛
If you have used...
More than 5 meters
of the pipes
Less than 5 meters
of piping
3-7. "Pump down" Procedure
❑
'Pump down' shall be carried out when an evaporator replaced or
when the unit is relocated in another area.
Remove the caps from the liquid valve and the
1
suction valve.
Turn the suction valve clockwise to close and
connect a pressure gauge(low pressure side) to
2
the service valve, and open the suction valve
again.
Set the unit to cool operation mode.
3
(Check if the compressor is operating.)
4 Turn the liquid valve clockwise to close.
When the pressure gauge indicates "0" turn the
5
suction valve clockwise to close.
6 Stop operation of the air conditioner.
7 Close the cap of each valve.
(Cont.)
Then...
"B"g of refrigerant "C"
must be added for each
extra metre.
The purge time is normal.
M
M
M
M
M
M
Type
ACH1800E/CH18ZA
ACH2400E/CH24ZA
ACH3600G/CH36ZA
ACH4400G/CH44ZA
CH18CA
CH24CA
CH36CA
CH44CA
ADH1800E/DH18ZA1(A2)
ADH2400E/DH24ZA1(A2)
ADH3200E/DH32ZA1(A2)
ADH4400G/DH44ZA1(A2)
a : when the indoor unit is above the outdoor unit
b : when the outdoor unit is above the indoor unit
Suction
valve
Relocation of the Air Conditioner
• Refer to this procedure when the unit is relocated.
1. Carry out the pump down procedure (refer to the details
of 'pump down').
2. Remove the power cord.
3. Disconnect the assembly cable from the indoor and out-
door units.
4. Remove the flare nut connecting the indoor unit and the
pipe.
5. Disconnect the pipe connected to the outdoor unit.
At this time, cover the valve of the outdoor unit and the
other pipe using a cap or vinyl plug to prevent foreign
material from entering.
6. Make sure you do not bend the connection pipes in the
middle and store together with the cables.
7. Move the indoor and outdoor units to a new location.
8. Remove the mounting plate for the indoor unit and move it
to a new location.
3
INSTALLATION
B
A C
a b
30 40 50
30 40 50
R-22
50 60 45
50 50 35
30 50 50
30 40 50
R407C
50 45 40
50 40 40
30 50 40
30 50 40
R-22
30 55 55
50 60 60
Liquid
valve
SAMSUNG | 43