KRACK FEV 11, Installation And Operation Manual

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Fluid Cooler Series Air-Cooled Fluid Cooling Units (PN E208134_D)
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Provisions must be made to accommodate expansion and contraction of the lines, especially if the lines
have long run with few elbows or bends. The lines must also be adequately supported at frequent intervals
in accordance with good piping practice. It is necessary that field bracing provide adequate support at the
fluid cooler connections. See Figure 12 for suggested arrangements.
Pressure testing of the piping should be done as soon as the field piping has been completed. The test
pressure should not exceed the unit UL nameplate pressure. Nitrogen may be used to increase the trace
refrigerant pressure for leak testing. Shipping vibrations can stress joints thus producing operating leaks
which would otherwise go undetected from just a low-pressure holding charge. Therefore, check for leaks
at all joints before filling the system.
Field piping design must prevent the coil from being isolated from the expansion tank. See Figure 13 for
typical piping. The fluid properties and circulation rate must be maintained to protect freezing.
FIGURE 12 UNIT MOUNTING AND PIPING
INTERCONNECTING PIPING
B-LINE / UNISTRUT IS
THE PREFERED PIPE
CLAMPING MEANS