86
NOTE
All wiring of this installation must comply with NATIONAL, STATE AND LOCAL REGULATIONS. These instructions 
do not cover all variations for every kind of installation circumstance. Should further information be desired or should 
particular problems occur, the matter should be referred to your local distributor.
WARNING
BE SURE TO READ THESE INSTRUCTIONS CAREFULLY BEFORE BEGINNING INSTALLATION. FAILURE TO 
FOLLOW THESE INSTRUCTIONS COULD CAUSE SERIOUS INJURY OR DEATH, EQUIPMENT MALFUNCTION 
AND/OR PROPERTY DAMAGE.
Preparation of indoor unit
Before or during the installation of the unit, assemble necessary optional panel etc. depending on the specic type.
Select places for installation satisfying following conditions and at the same time obtain the consent on the 
part of your client user.
a.Places where chilled or heated air circulates freely. When the installation height exceeds 3m warmed air stays 
close to the ceiling. In such cases, suggest your client users to install air circulators.
b.Places where perfect drainage can be prepared and sufcient drainage.
c. Places free from air disturbances to the suction port and blowout hole of the indoor unit, places where the re 
alarm may not malfunction or short-circuit.
d.Places with the environmental dew-point temperature is lower than 28 C and the relative humidity is less than 80 
%. (When installing at a place under a high humidity environment, pay sufcient attention to the prevention of dewing 
such as thermal insulation of the unit. )
e.Ceiling height shall have the following height.
Avoid installation and use at those places listed below.
a
.
Places exposed to oil splashes or steam (e.g. kitchens and machine plants).
Installation and use at such places incur deteriorations in the performance or corrosion with the heat exchanger or 
damage in molded synthetic resin parts.
b
.
Places where corrosive gas (such as sulfurous acid gas) or inammable gas (thinner, gasoline etc.) in generated 
or
 
remains. Installation and use at such places cause corrosion in the heat exchanger  and damage in molded 
synthetic resin parts.
c
.
Places adjacent to equipment generating electromagnetic waves or high-frequency waves such as in hospitals.
Generated noise may cause malfunctioning of the controller.
Model Liquid side Gas side
AD50S2SM1FA φ6.35mm φ12.7mm
AD71S2SM1FA φ9.52mm φ15.88mm
Pipe size
AD50S2SM1FA AD71S2SM1FA
Combination with silent panel 366mm
50mm
Obstacle
Installation space
100mm 100mm