Rev. E 10-2021
44
50
57
150
154
6L3
6L4
6L3
6L4
11
7
7
5
50
45
40
20
5
43
43
18
9
35
6L1
6L3
6L3
6N1
6N4
6L4
MTEC.4000.GB-E-1 Operation and maintenance manual LHA series English
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PRIORITY SELECTOR (Hot water) (only for 252÷2502)
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USER CIRCUIT FLOW SWITCH (SFW1)
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