Table of Contents
Advertisement
4000
1/2
5/8
6000
5/8
7/8
9000
5/8
7/8
12000
7/8
7/8
1 1/8
15000
7/8
1 1/8
1 1/8
18000
7/8
1 1/8
1 1/8
24000
1 1/8
1 1/8
1 1/8
30000
1 1/8
1 1/8
1 3/8
36000
1 1/8
1 3/8
1 3/8
42000
1 3/8
1 3/8
1 3/8
48000
1 3/8
1 3/8
1 5/8
54000
1 3/8
1 3/8
1 5/8
60000
1 3/8
1 3/8
1 5/8
66000
1 3/8
1 3/8
1 5/8
1. All line size are basic for O.D type L copper tube. The above table is maximum suction size and
riser size should not exceed horizontal size.
2. Suction line size should be selected at pressure drop equivalent to 2。F, and reduce estimate
of system capacity accordingly.
3. For easy oil return, use U trap in suction line.
4. Consider double suction risers, if capacity control can reduce capacity 35% below.
DEFROST
Once ice forms in an evaporator coil it keeps building more ice and eventually will lead
to equipment failure if not manually defrosted.
Some symptoms of ice forming in the coil are:
1. loss of air circulation and air throw
2. loss of room temperature.
3. no off-cycle time.
4. flood back.
5. water spitting out of the fans or coil on air defrost systems.
Long term ice formation will crush the refrigerant tubes in the coil causing leaks and
major equipment problems. If ice formation is suspected, carefully check the interior
rows of the coil with a good light. Ice formation usually starts at the bottom of the coil
in the middle rows and can be difficult to detect.
For most applications, two to four defrost cycles per day should be adequate. The
defrost requirements will vary on each installation so the defrost settings should be
determined by observing the system operation.
Air defrost
The normal "off cycle" of the compressor
5/8
5/8
5/8
5/8
7/8
7/8
5/8
7/8
7/8
1 1/8
7/8
7/8
1 1/8
7/8
7/8
1 1/8
7/8
1 1/8
1 3/8
7/8
1 1/8
1 3/8
1 1/8
1 1/8
1 3/8
1 1/8
1 3/8
1 5/8
1 3/8
1 3/8
1 5/8
1 3/8
1 3/8
1 5/8
1 3/8
1 3/8
1 5/8
1 3/8
1 3/8
1 5/8
1 3/8
1 3/8
1 5/8
1 3/8
1 3/8
7/8
7/8
5/8
5/8
7/8
7/8
7/8
7/8
7/8
1 1/8
7/8
7/8
1 1/8
1 1/8
1 1/8
7/8
1 1/8
1 1/8
1 1/8
1 1/8
1 1/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 1/8
1 3/8
1 3/8
1 1/8
1 3/8
1 3/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
1 5/8
1 5/8
1 3/8
1 3/8
may be adequate to keep the evaporator
11
7/8
7/8
3/8
3/8
1 1/8
1 1/8
3/8
3/8
1 1/8
1 1/8
3/8
3/8
1 3/8
1 3/8
3/8
3/8
1 3/8
1 3/8
3/8
3/8
1 3/8
1 3/8
3/8
3/8
1 5/8
1 5/8
3/8
1/2
1 5/8
1 5/8
1/2
1/2
1 5/8
1 5/8
1/2
1/2
1 5/8
1 5/8
1/2
1/2
1 5/8
1 5/8
1/2
1/2
1 5/8
1 5/8
1/2
1/2
1 5/8
1 5/8
1/2
1/2
1 5/8
1 5/8
1/2
1/2
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
3/8
1/2
1/2
1/2
1/2
1/2
1/2
5/8
1/2
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
5/8
- Quick Links:
- Table of Contents
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
