Daikin Super Multi NX 3MXS-G Series Engineering Data page 303

Outdoor Unit
1
Installing Outdoor Unit
● When installing the outdoor unit, refer to "Precautions for Selecting the Location" and the "Indoor/Outdoor Unit Installation Drawings".
● If drain work is necessary, follow the procedures below.
2
Drain Work
● Use drain plug for drainage.
● If the drain port is covered by a mounting base or floor surface, place additional foot bases of at least 3-15/16in in
height under the outdoor unit's feet.
● In cold areas, do not use a drain hose with the outdoor unit. (Otherwise, drain water may freeze, impairing heating performance.)
1. Insert drain receiver (C) onto drain socket (A) and drain cap (B) beyond 4
projections around drain socket and drain cap.
2. Insert drain socket and drain caps into their matching drain hole ; Drain socket
(A) into drain hole I and drain caps (B) into drain hole II and III. After insertion,
turn them about 40° clockwise.
II
I
III
NOTE
Check that the drain receiver (C) is correctly engaged with
the projections of the drain socket (A) and drain cap (B).
Otherwise, water leakage may result.
3. Connect vinyl hose on the market (internal diameter of 1 inch) to drain socket (A).
(If the house is too long and hangs down, fix it carefully to prevent the kinks.)
4. Make sure that there is no water leakage from portion I, II, or III.
NOTE
If the drain holes of the outdoor unit are covered with the mounting bracket or the floor, raise the unit to provide the
space of more than 3-15/16 inch under the leg of the outdoor unit.
3
Refrigerant Piping
CAUTION
1) Use the flare nut fixed to the main unit to prevent cracking and age deterioration.
2) To prevent gas leakage, apply refrigeration oil only to the inner surface of the flare. (Use refrigeration oil for R410A.)
3) Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and gas leakage.
Align the centers of both flares and tighten the flare nuts 3 or 4 turns by hand. Then tighten them fully with the torque wrenches.
[Apply oil]
Do not apply refrigeration
oil to the outer surface.
Flare nut
Do not apply refrigeration oil to the flare
nut avoid tightening with over torque.
298
Refrigerant Piping Work (1)
Be sure to insert sockets and caps into their proper
drain holes to prevent water leakage.
(View from bottom)
[Tighten]
Apply refrigeration
Torque wrench
oil to the inner
surface of the flare.
Spanner
Piping
union
Flare nut
(A) Drain socket
Projections
Projections
(4 points)
Flare nut tightening torque
Flare nut for φ1/4
10.5-12.7 ft-lbf
Flare nut for φ3/8
24.1-29.4 ft-lbf
Flare nut for φ1/2
36.5-44.5 ft-lbf
Flare nut for φ5/8
45.6-55.6 ft-lbf
Service port cap tightening torque
EDUS121131
(B) Drain cap
Projections
(C) Drain receiver
Projections
(4 points)
Valve cap tightening torque
Liquid pipe 19.5-23.8 ft-lbf
Gas pipe 35.5-44.0 ft-lbf
7.9-10.8 ft-lbf
Installation Manual