Manitowoc RF Installation And Use Manual

Also see for RF1200W: User manual Technician's handbook Installation, use & care manual

Contents

Installation Instructions Section 213 Part Number 000007644 3/11Step 4 Connecting the line setTo prevent oxidation of the copper, purge line set andcondensing unit with dry nitrogen while brazing.A. Connect the Line Set to the Remote CondensingUnitThe line set shut-off valves must remain closed and beprotected from heat during the brazing process. Wrapthe valves in a wet rag or other type of heat sink prior tobrazing. Cool braze joint with water immediately afterbrazing to prevent heat migration to the valve.B. Connect the Line Set to the Ice Machine HeadSection• Cut the suction and liquid tubing with a tubing cutter,leaving enough tubing to easily braze.• Connect the line set.• Cool braze joint with water immediately after brazingto prevent heat migration.Step 5 Pressure Test and Evacuate Line Set andIce Machine Head Section• Suction and liquid line set shutoff valves must remainclosed until pressure testing and evacuation arecomplete.• Pressure testing and evacuation can be performedfrom the ice machine head section or CVDcondensing unit shut-off valves.• Schrader valve core removal tools that allow forremoval and installation of the valve cores withoutremoving manifold gauge set hoses arerecommended to decrease the evacuation time.• Pressure test @ 150 psi (1000 kPa) for a minimum of15 minutes.• Minimum evacuation level is 500 microns.! WarningThe QuietQube Condensing unit contains refrigerantcharge. The two refrigeration valves must remainclosed until proper installation of the line sets iscompleted.! WarningThe ice machine head section ships from the factorypressurized with R404A refrigerant. Recover therefrigerant from both suction and liquid line accessports prior to cutting into refrigeration lines.MINIMIZE THE TIME THEREFRIGERATION SYSTEM ISEXPOSED TO THE ATMOSPHERE(15 MINUTES MAXIMUM)SUCTION LINELIQUID LINE Suction and liquid line shut-off valvesmust remain closed until evacuation andpressure testing are complete.