Mitsubishi Heavy Industries SRRM40HENG-L, Handbook, Page: 502 / 1106

500
FDKN-H
ø
27.5
ø16.4
ø12.4
(e) Installation of unit
Lid (right hand)
Mounting plate
Wall
Claw at the lower portion of indoor unit base.
Indoor unit
Mounting plate
Installation work procedure
(1) Hang the upper portion of in-
door unit on the mounting plate.
(2) The indoor unit can be fixed
with one action by pushing its
lower portion slightly.
Illustration showing the end of drain hose
No chevron-shaped bend is allowed.
No trap is allowed.
The end shall
n o t b e s u b -
merged in wa-
ter.
Hard vinyl chloride pipe (general-purpose
pipe VP-16) can be connected.
CAUTION
The drainage work must be performed surely and the
drainage must be checked. If drainage is not perfect, it
causes water leakage.
• To remove the unit from the
mounting plate, remove the
right and left lids then remove
the claw at the lower portion
of base.
(4) Refrigerant piping
(a) Comply the following table for the tightening torque of the flared nut and flange bolt.
Flared nut tightening torque
φ
6.35: 16 to 20 (N-m), (1.6 to 2.0 kg-m)
φ
9.52: 40 to 50 (N-m), (4 to 5 kg-m)
φ
15.88: 90 to 120 (N-m), (9 to 12 kg-m)
Wrap the gaseous refrigerant piping and liquid refrigerant piping with thermal insulator perfectly.
(b) In the case of liquid refrigerant piping, if it is not insulated, dew condensation and water leakage may occur.
(c) When removing the flared nut at the piping end of unit, always use 2 of spanners, and when
connecting the pipe tighten it firmly using 2 of spanners.
(d) When connecting the flared nut, apply refrigerating machine oil on the back surface of flare
and screw-in the nut for the first 3 to 4 turns by hand.
(e) Use the pipe made of the following material. It is very convenient to use the separately sold
piping kit.
Material: Phosphor deoxidized seamless copper tube (C1220T,JIS H3300)
(f) Cover the connection part with indoor unit insulation material and insulate the notched part
with attached insulation and then wrap it up with tape.
(6) Fixing of wiring
(a) Remove the front panel.
(b) Connect the wire from the indoor and outdoor units to the terminal table of control box.
(c) Attach the front panel.
Notes (1) Refer to the illustration below for the removal and attaching of the front panel.
(2) Before connecting the wiring to the terminal table, confirm the terminal number.
Arrange so that the
cut portion is lo-
cated upper side.
Vinyl tape
Insulate with attached in-
sulation.
(5) Drain piping
(a) Lay the drain piping with downgrade to facilitate flow of drain,and do not make a trap or chevron-shaped bend. (The drain
piping can be taken out from the unit to the left, right, rear and down direction.)
Wrap the thermal insulator on the hard vinyl chloride pipe (VP-16) laid in the room.
(b) Pour water into the drain pan below the heat exchanger to
check that water is drained outdoors.
Claw (2 places)
(FDKN308: 3 places)