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1.10 Instructions for starting up the unit
1.10.1 Rotational direction of Scroll compressors
The Scroll compressors only operate correctly in one direction of rotation. Although these units are pro‐
tected by a phase order detector, when the unit is started, check that the unit rotates in the correct
direction. If it is not correct:
If the compressors are not connected correctly and are rotating in the wrong direction:
• The compressor will not compress.
• Operating noise will be abnormal.
• Electricity consumption (A) will be low.
• They overheat.
The phase detector must have both LEDs lit for correct operation:
• Green LED lit means: Power ON.
• Yellow LED lit means: Relay ON.
1.11 Unit sound pressure data
YLCA-YLHA Plus models
YLCA-YLHA Plus models
Frequency (Hz)
5
7
9
12
15
20
27
125 Hz
66,2
66,2
74
79,6
79,6
77
75,6
250 Hz
70,5
70,5
72,3
74,3
74,3
72,4
81,3
500 Hz
67,7
67,7
67,9
70,2
70,2
72,9
75,9
1000 Hz
65,7
65,7
66,1
67,5
67,5
69,1
70,8
2000 Hz
60,2
60,2
61,8
62,7
62,7
63,9
68,6
4000 Hz
55,1
55,1
56,3
57,7
57,7
58,2
63,3
8000 Hz
48,8
48,8
52,3
51
51
52,5
55,7
Sound power level dB (A)
70
70
71
73
73
74
78
The data given in this table are sound power values in accordance with ISO EN3743.
Installation manual
1
Instructions for starting up the unit 1.10
33
Summary of Contents for Ylha plus 12
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Page 40: ...2 Electric circuit diagrams...