IM 1128-2
45
Type IV Disassembly-Reassembly
Disassembly
Type IV Knockdown units are shipped disassembled except for the vessel stack and are shipped less
refrigerant, If the stack size or weight dictates further disassembly, the vessels can be separated by
disconnecting any interconnecting wiring and tubing and then unbolting them. The vessels and compressors
have a helium holding charge that must be released prior to attempting to open any connection.
Reassembly
1.
Reassemble the vessel stack, if disassembled, and reconnect any wiring and tubing.
2.
Mount the compressor(s) on the stack. Be careful to avoid damaging lines already mounted on the unit.
Mounting bolts, washers and nuts are shipped loose. Leave the mounting bolts loose until the suction and
discharge lines are installed and aligned.
During assembly, bolts holding block off plates (suction connection, for example), are used for reassembly
of the component. See Figure 25 for the location and description of the block offs.
3.
Do not remove block offs until ready to install piping. The compressor and vessels have a Schrader valve
on their block off plates to be used for relieving the helium holding charge.
WARNING
Remove compressor, piping or vessel holding charge through the Schrader valve in the block off plates
before attempting to loosen any fittings on them. Failure to do so can cause severe bodily injury.
4.
Install the suction and discharge line(s). See Figure 30. Tighten bolts after the entire line has been
installed and aligned. Insulate the suction line with the insulation and glue provided.
5.
Install the liquid line and motor cooling lines. See
Figure 31
and
Figure 32
.
6.
Install control panel and compressor power panels by bolting to the horizontal support members.
7.
If the unit has single-point power, connect the power leads from the terminal box under the control panel to
each power panel line side connection.
8.
Connect any loose wiring.
9.
Pressure (leak) test, evacuate, and charge with field supplied R-134a using standard refrigeration practice.
Type V Disassembly-Reassembly
Type V units are designed for a wide range of disassembly and the degree of knockdown varies. Use
instructions and drawings from Type IV Disassembly-Reassembly instructions above. Observe the following
recommendations.
1.
The chiller is shipped with the full refrigerant charge that must be pumped down into the condenser or
removed before breaking any refrigerant connection. Before attempting any disassembly, assume the
condenser isolation valves may have leaked and that any component of the chiller may be pressurized with
refrigerant. Exert the proper precautions with this caveat in mind.
2.
Check that power has been removed from the unit. Before disconnecting any wire, it is prudent to label its
function and connection point to facilitate reconnection.
3.
The refrigerant charge must be removed from the unit if the vessels are to be separated.
4.
Some insulation repair and touch-up painting may be required.
5.
See Type IV instructions for reassembly of components.
!
Содержание WMC-B 145D
Страница 17: ...IM 1128 2 17 Figure 18 Unit panel wiring and connections Figure 15 Unit panel detail ...
Страница 25: ...IM 1128 2 25 Figure 18 Compressor Control Box ...
Страница 26: ...26 IM 1128 2 Figure 19 Unit Control Box ...
Страница 27: ...IM 1128 2 27 Figure 20 Flow Switch Wiring ...
Страница 28: ...28 IM 1128 2 Unit Photographs Figure 21 WSC 087 Photo Figure 22 WSC 100 Photo ...
Страница 29: ...IM 1128 2 29 Figure 23 WSC 126 Photo ...
Страница 31: ...IM 1128 2 31 Field Insulation Guide Figure 24 Insulation Requirements ...
Страница 32: ...32 IM 1128 2 ...
Страница 51: ...IM 1128 2 51 Figure 32 Type IV Liquid Line Removal Figure 33 Type V Liquid line Removal ...
Страница 52: ...52 IM 1128 2 Figure 34 Type V Vessel Separation ...
