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Key:
1
condenser probe
2
condenser 1 and 2
3
antifreeze heater 1 and 2
4
reversing valve
5
compressor 1
6
high pressure 1 and 2
7
compressor overload 1 and 2
8
low pressure 1 and 2
9
compressor 3
10
compressor 2
11
compressor 4
12
water pump
Key:
1
condenser fan overload
2
fan
3
condernser probe 1 and 2
4
supply probe
5
electrical heater 1 e 2
6
evaporator 1 e 2
7
supply fan overload
8
supply fan
9
compressor 1
10
high pressure 1 and 2
11
compressor overload 1 and 2
12
low pressure 1 and 2
13
ambient probe
14
compressor 2
15
reversing valve 1and 2
16
compressor 3
17
compressor 4
18
freecooling/freeheating damper
19
enable humidifi er
3.11.2 Two circuits
1
2
1
3
1
4
5
12
6
7
1
1
10
3.12 Roof Top units
3.12.1 Example of Roof Top units with two circuits
3
1
15
1
9
11 12
10
1
1
14
24
1
12
8
1
Fig. 3.k.b
1
1
2
4
19
5
5
1
2
6
7
7
8
13
1
18
Fig. 3.k.l
μC
2
SE - +030220426 - rel. 2.1 - 09.06.2010
2
2
3
2
4
9
6
7
8
2
2
2
11
3
2
6
2
15
2
16
12
11
10
2
2
2
17
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