INS-15
DUAL, TRIPLE, POKER DC Inverter : 4. Installation
Multi Liberty
DC Inverter
Keep in mind the following:
1. Wiring between each Indoor Unit and the Outdoor Unit, and of drain hose, must be taped togwther
with refrigerant pipings, by using adhesive tape.
2. On Outdoor Unit, wiring and refrigerant connections of each Indoor Unit (“A”, “B”, “C”, “D”) must
correspond.
3. The corresponding position of pipes and cables is indicated on the Figure at the bottom of the previous
page.
4. In case of left-side outlet [case described in item “b)” on the previous page] or rear-left outlet of pipings,
fix the whole of pipings nad cables to Indoor Unit by special clips.
5. These air conditioning systems require insulation of pipings and of related connection points both on
Gas side and Liquid side, as they can both reach low temperatures or high temperatures during operation.
• Strictly tape (no air pocket must be left between connections and insulating material) connection points
by using insulating material, and seal by adhesive tape. If you fail this precaution, condensate may form
on connection points, and water may drip inside the room.
(6) Fixing of Indoor Units
Temporarily suspension of Indoor Units on upper hooks of fixing plate.
Insert a spacer (wooden block or other object) between the lower part of each Indoor Unit and its fixing
plate, to separate the Unit’s base from wall and get space for carrying on work.
•Tighten the connection
definitively with a torque
wrench and a spanner:
(7) Refrigerant pipings
Oil flares’ back and indoor side of flare nuts by refrigerant synthetic oil. Align to pipe fittings the axis of
pipings to be connected and screw flare nuts on threaded pipe union of Indoor Unit. First of all, tighten
the connection manually as much as possible.
(8) Position of drain hose
As regards the whole formed by wiring and refrigerant pipings, drain hose must be positioned downwards.
Besides, in particular, the first portion of drain hose (about 1m) - that is the portion which is inside Unit
- must be covered by insulating material.
The Figures on the following page show some examples of incorrect installation of drain hose. They are
the most common errors during installation work (so they must be avoided).
☞
Piping
Flare nut
Indoor Unit’s pipe union
W
all
Spacer
Service space
Fixing plate
Indoor Unit
Refrigerant pipings
Fork wrench
Flare nut
Torque wrench
Indoor Unit’s
pipe union
Fastening torque and pipe diameter (Ø")
29.4~34.3 N•m (3/8")
GAS side
LIQUID side
15.7~19.6 N•m (1/4")
49.0~53.9 N•m (1/2")