5-5
FIELD WORK INSTRUCTION
Question and Answer for Field Work
Example 5: Not Cooling Well due to Insufficient Installation Space
for Outdoor Unit
[Phenomenon]
Cooling operation was well performed through the intermediate season. However, the cooling
operation was not well available when the outdoor temperature was higher than 35°C.
[Cause]
As the outdoor units were installed without a sufficient installation space, the hot discharge air from
other outdoor units was circulated.
In this case, though the outdoor temperature was 35°C, the actual suction air temperature was nearly
50°C and Protection System from Excessively High Suction Pressure was activated, the frequency of
the compressor was decreased and the cooling capacity was also decreased accordingly.
As the outdoor units in-line were installed back to back with a distance of 600mm between each
outdoor unit’s back, the hot discharged air from other outdoor units was circulated.
[Countermeasure]
To protect the unit from a short circuit, fences were mounted at the discharge air side as shown
below.
5.5 Not Cooling Well due to Insufficient Installation Space for Outdoor Unit
Fence
Min.
300mm
Min.
300mm
To Next Page
Loading...
