3. INSTALLATION OF THE OUTDOOR UNIT
Location For Installation
Install the outdoor unit in such way that air distributed by the outdoor unit cannot be drawn in again (as in the case
of short cycling of discharge air). Allow sufficient space for maintenance around the unit.
Select the coolest possible place where intake air should not be higher than the outside temperature (maximum
48
°
C).
Ensure that there are no obstruction of air flow into or out of the unit. Remove obstacles which block air intake or
discharge.
When two or more outdoor units are installed in a location, they must be positioned such that one unit will not be
taking the discharge air from another.
This also applies when two or more units are installed one above the other. The all units must face the same
direction, or opposite direction (back to back), such that air short cycling does not occur.
The location must be well ventilated, so that the unit can draw and distribute plenty of air.
A place capable of bearing the weight of the outdoor unit and isolating noise and vibration.
A place protected from direct sunlight. Otherwise use an awning for protection, if necessary.
A place where smooth drainage of rain water and water formed by defrosting is acceptable.
A place where the unit will not be buried in snow.
A place where air outlet port is not exposed to strong wind.
A place where the air discharge and operating sound level will not annoy the neighbours.
The location must not be susceptible to dust or oil mist.
Location For Installation Of The Condensing Units
As condensing temperature rises, evaporating temperature rises and cooling capacity drops. In order to achieve
maximum cooling capacity, the location selected should fulfill the following requirements:-
a) Install the condensing (outdoor) unit in a way such that hot air distributed by the outdoor condensing unit cannot
be drawn in again (as in the case of short cycling of hot discharge air). Allow sufficient space for maintenance
around the unit.
AIR INTAKE
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b) Ensure that there is no obstruction of air flow into or out of the unit. Remove obstacle which block air intake or
discharge.
OBSTACLE BLOCKING AIR INLET
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OBSTACLE BLOCKING AIR OUTLET
c) The location must be well ventilated, so that the unit can draw and distribute plenty of air thus lowering the
condensing temperature.
d) A place capable of bearing the weight of the outdoor unit and isolating noise and vibration.
e) A place protected from direct sunlight. Otherwise use an awning for protection, if necessary.
f) A place where the hot air discharge and operating sound level will not annoy the neighbours.
g) The location must not be susceptible to dust or oil mist.
Caution: If the condensing unit is operated in an atmosphere containing oils (including machine oils), salt (coastal
area), sulphide gas (near hot spring, oil refinery plant), such substances may lead to failure of the unit.
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