-
115
-
(b) Example of calculation of additional charge volume
FDCA801 (Twin type) Main pipe: 20 m, Branch pipe: 15m What is the amount of additional charge?
(
205
)
0.12150.062.7
Additional charge (kg/m) per meter of branch pipe
Branch pipe total length (m)
Additional charge (kg/m) per meter of main pipe
Main pipe length
Length of main pipe (m) that can be connected with
the refrigerant charge already supplied to the unit.
Amount of additional charge = 2.7 kg (be sure to weigh the refrigerant before charging).
Exterior tape
Gas piping
Liquid piping
Wires for connecting indoor
and outdoor units
Insulation
(5) Heating and condensation prevention
1) Dress refrigerant pipes (both gas and liquid pipes) for heat insulation and prevention of dew condensation.
Improper heat insulation/anti-dew dressing can result in a water leak or dripping causing damage to household effects, etc.
2) Use a heat insulating material that can withstand 120˚C or a higher temperature. Poor heat insulating capacity can cause heat
insulation problems or cable deterioration.
a) The gas pipe can cause during a cooling operation dew condensation, which will become drain water causing a possible
water-leak accident, or reach during a heating operation as high a temperature as 60˚C to 110˚C, posing a risk of bums, when
touched accidentally. So, do not fail to dress it with a heat insulation material.
b) Warp indoor unit’s flare joints with heat insulating parts (pipe cover) for heat insulation (both gas and liquid pipes).
c) Give heat insulation to both gas and liquid side pipes. Bundle a heat insulating material and a pipe tightly together so that no
gaps may be left between them and warp them together with a connecting cable by a dressing tape.
d) Although this air conditioning unit has been tested under the JIS condensation test conditions, the dripping of water may
occur when it is operated in a high-humidity atmosphere (23˚C or a higher dew point temperature). In such a case, apply an
additional heat insulation material of 10 to 20 mm thick to dress an indoor unit body, piping and drain pipes.
Pipe cover (accessory)
Band (accessory)
(6) Drain piping work (Models FDCA301~601 only)
● Execute drain piping by using a drain elbow and drain grommets supplied separately as optional parts, where water drained
from the outdoor units is a problem.
There are 3 drain holes provided on the bottom plate of an outdoor unit to discharge condensed water.
When condensed water needs to be led to a drain, etc., install the unit on a flat base (supplied separately as an optional part)
or concrete blocks.
Connect a drain elbow as shown in the illustration and close the other two drain holes with grommets.
Drain elbow (1 pc.)
Drain grommet
(2 pcs.)
(local procurement)
Hard vinyl chloride pipe for
general purpose (VP-16)
(local procurement)
To Next Page
Loading...
Need help?
General
