Trane 4TVH0086FE000AA Service Manual page 32

14/16/18HP
Cooling operation
Figure 2-3.5: 14/16/18HP 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
1
9
Oil return operation in cooling mode
Figure 2-3.6: 14/16/18HP 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
T7C1
1
9
11
10
7
T3
T4
15
11
10
7
T3
T4
SV5
15
13
8
EXVA
SV5
14
EXVC
12
13
8
EXVA
14
EXVC
12
31
Unit on
Fan
Thermostat on
on
Filter
Filter
Normal control
Unit on
Fan
on Thermostat on
Filter
Filter
Normal control
Unit off
Fan
off
Filter
Filter
Closed
Unit on
Fan
Thermostat off
on
Filter
Filter
Closed
Unit on
Fan
Thermostat on
on
Filter
Filter
Normal control
Unit on
Fan
on
Thermostat on
Filter
Filter
Normal control
Unit off
Fan
off
Filter
Filter
300 steps
Unit on
Fan
Thermostat off
on
Filter
Filter
300 steps