Thermalec ZENITH ZHR 96, Инструкция по эксплуатации

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Zenith Range Instruction Manual
Page 10
Location
The protection rating of the heater is lP21 and it should be installed in a weatherproof
enclosure with good drainage . A suitable anti-condensation heater should be provided in
high ambient humidity conditions, since moisture can damage electrical components.
The heater must be installed in a cool , dry location. Regulations that stipulate minimum
distances for electrical equipment from water sources must be observed .
Positioning the heater on the flowsheet
The following diagram illustrates a suggested plant flowsheet showing the positioning of
the heater with respect to the other plant room process units.
Chemical dosing systems should not be installed adjacent to the heater. lf installed
upstream of the heater it must be before the filter. lf installed downstream, a check
valve must be fitted to prevent backflow of chemicals when the filter pump is not
operating. There should be a drop in level between the pipe leaving the heater and
entering the dosing system.
The pipe system should have valves to isolate the heater. A shut off valve should be
included in the bypass to stop the flow around the heater when not required.
Figure 3 Suggested heater position on plant room flowsheet