"A" Ductable Liquid Chillers with Integrated Hydronic Module

Service CCarry out the operations listed under Service B.Refrigerant circuit- Check the leak-tightness of the circuit and ensure thatthere is no piping damage.- Carry out an oil contamination test. If acid, water ormetallic particles are present replace the oil in the circuit.- Verify the tightening of the thermostatic mechanism ofthe expansion device.- Full-load operating test. In addition to the checks carriedout under Service B, validate the values of the heatexchanger inlet and outlet tightening.- Check the operation of the high-pressure and low-pressureswitches. Replace them if there is a fault.- Check the fouling of the filter drier (by checking thetemperature difference in the copper piping). Replace it ifnecessary.Electrical checks- Check the status of the electrical cables and theirinsulation.- Carry out an operating test of the electric evaporatorheaters, compressor crankcase heater, piping andexpansion device, as required.- Check the phase/earth insulation of the compressors, fansand pumps.- Check the compressor, fan and pump winding status.Mechanical checks- Check the tightening of the fan tower, fan, compressorand control box fixing bolts.- Check that no water has penetrated into the control box.- All metallic parts of the unit (chassis, casing panels,control boxes, heat exchangers etc.) are protected againstcorrosion by a coating of powder or liquid paint. Toprevent the risk of blistering corrosion that can appearwhen moisture penetrates under the protective coatings, itis necessary to carry out periodic checks of the coating(paint) condition.Water circuit checks- Clean the water filter.- Purge the circuit with air.- Verify the correct operation of the water flow switch.- Check the status of the thermal piping insulation.- Check the water flow by checking the heat exchangerpressure difference (using a pressure gauge).- Check the concentration of the anti-freeze protectionsolution (ethylene glycol or polyethylene glycol).- Checkthe satus of the heat transfer fluid or the water quality.- Check the steel pipe corrosion.Service D- Single pump and dual pump.- Mechanical seal: replace this every 13000 operatinghours.- Bearing: replace this every 20000 operating hours.28