Connecting Copper Pipes - Emerson SmartCabinet User Manual

Note
1. The outdoor unit should be installed in a safe place easy for maintenance. Do not install it on the bottom floor of public site. It
must be far away from residential area.
2. It is inappropriate to place the outdoor unit in environmental which has high requirement on noise.
3. To ensure cooling effect, the outdoor unit should be place in a clean place, free of dust and foreign matters, to avoid blocking
the heat exchanger.
4. The outdoor unit cannot be placed in the neighborhood of steam, hot gas and exhaust gas.
5. Keep a distance of above 450mm between the outdoor unit and the wall, obstacles or adjacent devices.
6. The outdoor unit cannot be placed in places where snow may accumulate in the air intake side and the air outlet side.
7. It is necessary to prepare a base which can bear the weight of the outdoor unit. The base should be at least 50mm higher than
the ground around, and 50mm wider than the outdoor unit base (see Figure 3-7).
8. The outdoor unit is about 43kg. When removing it from the cabinet and lift it onto the top of the cabinet, avoid personal injury
and device damage.

3.2.3 Connecting Copper Pipes

1. General Principles
1) Use copper pipes with quick thread connector to connect the indoor unit and the outdoor unit. If the pipe length
exceeds the standard pipe length (see Table 3-1) and straight copper pipe is used, piping joints must be brazed.
2) Follow standard industry procedures in selection and placement of pipe, system evacuation and charging with
refrigerant (only when pipeline is too long). The standard refrigerant of the AC unit is R410A, and the charging
amount is 1.2kg.
3) Give considerations to pipeline pressure drop, oil return to the compressor, to avoid oil leakage and clogging in
parts of the system and minimize noise and vibration to the greatest extend.
4) Consult Emerson before installation on whether measures such as using extended piping kit are needed, if the
equivalent length exceeds 20m, or if the vertical distance between the indoor unit and the outdoor unit exceeds the
values in Table 3-1.
Outdoor unit installed higher than indoor unit
Outdoor unit installed lower than indoor unit
5) The equivalent length of each part is given in Table 3-2. The resistance loss caused by elbows and valves has
been taken into consideration. The installer should confirm if these values are appropriate for site conditions.
Liquid pipe OD (inch)
1/4
1/2
2. Installation notes of connector
Top piping and bottom piping are both OK for the AC of the SmartCabinet system (For bottom piping, loosen the
connectors that connect the pre-installed pipes in the cabinet and the indoor unit). The connectors of the unit are
located on the AC indoor unit and outdoor unit and on top of the cabinet. Be careful when connecting the quick thread
connector. Read through the following steps before making connection.
1) Remove the dust-proof caps.
2) Carefully wipe coupling seats and threaded surface with a clean cloth.
3) Lubricate the male thread with refrigerant oil.
4) Thread the coupling halves together by hand to ensure that the threads mate properly.
5) Tighten the coupling body's hexagon nut and union valve until a definite resistance is felt.
6) Use a marking pen to draw a line lengthwise from the coupling union nut to the bulkhead. Tighten the nuts an
additional quarter turn with two wrenches. The misalignment of the lines shows how much the coupling has been
Table 3-1 Vertical distance between indoor unit and outdoor unit
Relative position
Table 3-2 Equivalent length of each part
90° elbow
0.21
0.24
SmartCabinet Integrated Solution User Manual
Chapter 3 Installation
Value
Maximum: 10m
Maximum: 5m
Equivalent length (m)
45° elbow
0.10
0.12
17
T-type three way
0.76
0.76