Sanyo ECO G SGP-EW120M2G2W, Technical Data Manual

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System Design
5. Outdoor unit positioning requirements
D-25
(2) Verandah installation criteria
If outdoor units are installed on a verandah where they are surrounded (by walls and ceiling) on five sides, the
design layout must take into account short-circuit airflow and maintenance space requirements. Evaluate the
installation on each floor of a building in the same way.
(1) Design points
1) Do not allow the exhaust air from an outdoor unit to recirculate, as this would seriously degrade system
performance.
2) Do not install a gallery on the exhaust outlet. (Installing a gallery reduces airflow by over 10%.)
3)
Create an environment in which exhaust air from the outdoor unit will not cause any problems.
4) Comply with local regulations regarding operating noise from outdoor units.
5) Distance to the nearest building should be at least 10m.
6) Design external air conditions are based on ambient temperature of 35ºCDB or less.
7) Make certain to provide adequate maintenance space.
(2)Necessary inflow area
1) For an installation like that of Figure 1, the shaded area indicates the inflow area.
2) The necessary inflow area for one 13- to 25-HP outdoor unit is 12.7m
2
, so the shaded area is the
necessary inflow area
(3) Maintenance space
Provide maintenance space with the dimensions in Figures 1 and 2.
Figure 1 Figure 2
(4) Installations on each story
When installing on multiple stories, a horizontal separation of 5m should be provided as shown in Figure 3
to prevent intake of exhaust air from outdoor units on the floor below.
Figure 3.
Outdoor unit
3F
2F
1F
At least 5 m
Outdoor unit
Outdoor
unit
Exhaust outlet
At least 350
At least 350
At least 1000
(Front)
At least
R1000
At least 1000
(Refrigerant pipe side)