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Notes:
1. The suction line is connected to the coil entering air side.
2. For a single-section coil use the piping shown for the upper section. For coils with two sections use the piping shown for the upper and the middle sections.
3. The lower section is always the first section to be activated and the last to be shut off.
4. Refer to the Carrier System Design Manual, Part 3, for more guidance on piping techniques.
10
Fig. 4 - 38AJ/AZ 046-074, dual evaporator
Fig. 5 - Suction line piping to three-section split evaporator coil
Fig. 6 - Suction line piping
Legend:
1
Solenoid valves
2
Thermostatic expansion valve TXV
3
Evaporator
4
Moisture sight glass
5
Filter drier
6
Liquid line
A
Circuit 1
B
Circuit 2
Legend:
1
"L" reduction
2
"T" reduction
3
To compressor (via double suction riser if necessary)
4
TXV sensing bulb
5
10 x dia. min.
6
8 x dia. min.
7
Reduction coupling
8
Air flow
9
Coil end centre line
A
Upper section
B
Middle section
C
Lower section
Legend:
A
Suction riser without trap
B
Suction riser with trap
C
Suction riser line to condensing unit
1
Evaporator
2
1 m max.
3
Condensing unit
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