Refrigerant Piping Work; Installing Outdoor Unit; Drain Work - Daikin R410A Split Series Installation Manual

Refrigerant piping work

1.

Installing Outdoor Unit

1) When installing the outdoor unit, refer to "Precautions for Selecting the Location" and the "Indoor/outdoor Unit Installation
Drawings."
2) If drain work is necessary, follow the procedures below.
2.

Drain Work

1) Use drain plug for drainage.
2) If the drain port is covered by a mounting base or floor surface, place
additional foot bases of at least 30 mm in height under the outdoor
unitís feet.
3) In cold areas, do not use a drain hose with the outdoor unit.
(Otherwise, drain water may freeze, impairing heating performance.)
3.
Refrigerant Piping
1) Align the centres of both flares and tighten the flare nuts 3 or 4 turns by hand. Then tighten them fully with the torque
wrenches.
• Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and escaping gas.
Flare nut for φ6.4
Flare nut for φ9.5
2) To prevent gas leakage, apply refrigeration machine oil on both inner and outer surfaces of the flare.
(Use refrigeration oil for R410A)
IEnglish
Coat here with refrigeration machine oil
Flare nut tightening torque
14.2-17.2N • m
(144-175kgf • cm)
32.7-39.9N • m
(333-407kgf • cm)
Bottom frame
Drain plug
(Optional Accessory)
Hose (available commercially,
inner dia. 16mm)
Torque wrench
Spanner
Piping union
Flare nut
Valve cap tightening Service port cap
torque tightening torque
21.6-27.4N • m 10.8-14.7N • m
(220-280kgf • cm) (110-150kgf • cm)
Drain-water hole
While pressing
6