"Pump Down" Procedure - Samsung IDH1800E Service Manual

2. Refrigerant Adjustment (Supplement)
Adding Refrigerant
Refrigerant must be added if the piping measures more than 5 metres in length (maximum of "A" metres). 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 metres
of the pipes
Less than 5 metres
of piping

4-4-18 "Pump down" Procedure

• 'Pump down' shall be carried out when an
evaporator replaced or when the unit is relocated in
another area.
1. Remove the caps from the liquid valve and the suction
valve.
2. Turn the suction valve clockwise to close and connect
a pressure gauge(low pressure side) to the service
valve, and open the suction valve again.
3. Set the unit to cool operation mode.
(Check if the compressor is operating.)
4. Turn the liquid valve clockwise to close.
5. When the pressure gauge indicates "0" turn the
suction valve clockwise to close.
6. Stop operation of the air conditioner.
7. Close the cap of each valve.
Samsung Electronics
Then...
"B"g of refrigerant (R-22)
must be added for each
extra metre.
The purge time is normal.
Relocation of the Air Conditioner
• Refer to this procedure when the unit is relocated.
1. Carry out the pump down procedure (refer to the
2. Remove the power cord.
3. Disconnect the assembly cable from the indoor and
4. Remove the flare nut connecting the indoor unit
5. Disconnect the pipe connected to the outdoor unit.
6. Make sure you do not bend the connection pipes in
7. Move the indoor and outdoor units to a new
location.
8. Remove the mounting plate for the indoor unit and
Type
ADH1800E/DH18ZA1(A2)
ADH2400E/DH24ZA1(A2)
ADH3200E/DH32ZA1(A2)
For details about the installation
situation(a or b)
• Refer to 4-16 page
Suction
details of 'pump down').
outdoor units.
and the pipe.
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.
the middle and store together with the cables.
move it to a new location.
Installation
B
A
a b
30 50 40
30 50 40
30 55 55
Liquid
valve
valve
4-33