Xylem BrazedPlate Heat Exchangers User Manual

Heat Transfer
BrazedPlate Heat Exchangers
Installation, Operation and Maintenance Manual
Installation
FIGURE 1
FIGURE 2
T
Mb
Mv
Evaporators
Refrig. In: ......... F4
Refrig. Out: ...... F1
Liquid In:............ F2
Liquid Out: ......... F3
STEAM TO LIQUID
Condensers
Steam In: ......... F1
Condensate Out: F4
Liquid In:............ F3
Liquid Out: ......... F2
Condensers
REFRIGERATION:
Refrig. In: ......... F1
Refrig. Out: ...... F4
Liquid In:............ F3
Liquid Out: ......... F2
TABLE 4
TABLE 1
of ITT Brazed Plate Heat Exchangers
Upon receipt of the exchanger, inspect for shipping
1.
2.
3.
damage, especially to the connections. If damage is extensive, notify the carrier immediately. Finally, check the heat exchanger against proper drawings and spec sheets to make sure everything is as expected.
Before piping up, inspect all openings in the
heat exchanger for foreign material. Remove all plugs and shipping covers immediately prior to installing. Make sure it is thoroughly cleaned to remove all preservation materials, if any were used, unless the material is soluble in the system fluid.
For single phase fluids, the heat exchanger can be
mounted in any orientation that is convenient and should be piped in a counter current, parallel flow arrangement. For two phase fluids, the heat exchanger should be mounted vertically and piped as shown in Figure 1 and Table 1. Connections may be either on the front or back of the exchanger.
Provide air vent valves for the heat exchanger so that it
4.
5.
6.
7.
can be purged to prevent or relieve vapor or gas binding.
Install proper relief valves and temperature alarms to make sure the heat exchanger is not subject to
conditions beyond the intended design.
Do not weld or braze brackets or attachments directly to body of heat exchanger.
For soldering type connections, braze with minimum
45% silver solder and at maximum 1200° F. For welded type connections use TIG or MIG welding. Avoid overheating. A wet cloth or rag should be placed around the base of the connection. A Nitrogen purge should be used to avoid internal oxidation. Braze or weld with exchanger in the vertical position.
CAUTION:
Many Heat exchangers circulate fluids which are irritating or dangerous to the human system.
These fluids could cause problems if bolted or threaded joints are not maintained in a leak tight
condition at operating pressures, temperatures, and no flow, ambient conditions.
Even if fluids are not irritating or dangerous, a leak could cause a slippery situation on the floor below.
Since one fluid in the heat exchanger is at a higher temperature, any leaks may cause burns.
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