Trane 4TVH0086FE000AA Service Manual page 34

20/22/24HP
Cooling operation
Figure 2-3.9: 20/22/24HP refrigerant flow during cooling operation
High temperature, high pressure gas
High temperature, high pressure liquid
Medium temperature, medium pressure gas
Low temperature, low pressure
E S C
6
5
4
3
2
T7C1
T7C2
1
1
Oil return operation in cooling mode
Figure 2-3.10: 20/22/24HP refrigerant flow during oil return operation in cooling mode
High temperature, high pressure gas
High temperature, high pressure liquid
Medium temperature, medium pressure gas
Low temperature, low pressure
E S C
6
5
4
3
2
T7C1 T7C2
1
1
11 11
10 10
7
T3
T4
2
9 15
SV2
SV9
11
11
10 10
7
T3
T4
2
9 15
SV2
SV9
13
8
SV5
EXVA
13
8
SV5
EXVA
33
Filter
Normal control
Filter
Normal control
Filter
Closed
12
Filter
Closed
Filter
Normal control
Filter
Normal control
Filter
300 steps
12
Filter
300 steps
Unit on
Fan
Thermostat on
on
Filter
Unit on
Fan
on
Thermostat on
Filter
Unit off
Fan
off
Filter
Unit on
Fan
Thermostat off
on
Filter
Unit on
Fan
Thermostat on
on
Filter
Unit on
Fan
on
Thermostat on
Filter
Unit off
Fan
off
Filter
Unit on
Fan
Thermostat off
on
Filter