Carrier 23XRV Installation Instructions Manual

Also see for EVERGREEN 23XRV: Start-up and service instructions Start-up and service instructions Start-up and service instructions Installation instructions Product data

Contents

42INSTALL SPRING ISOLATIONSpring isolation may be purchased as an accessory fromCarrier for field installation. It may also be field supplied andinstalled. Spring isolators may be placed directly undermachine support plates or located under machine soleplates.See Fig. 49. Consult job data for specific arrangement. Lowprofile spring isolation assemblies can be field supplied to keepthe machine at a convenient working height.Obtain specific details on spring mounting and machineweight distribution from job data. Also, check job data formethods to support and isolate pipes that are attached to springisolated machines.NOTE: These isolators are not intended for seismic duty, butare intended to reduce the vibration and noise levels transmit-ted from the chiller to the surrounding environment. For instal-lations adjacent to areas that are sensitive to noise and/orvibration, use the services of a qualified consulting engineer oracoustics expert to determine whether these springs will pro-vide adequate noise/vibration suppression.Step 6 — Connect PipingINSTALL WATER PIPING TO HEAT EXCHANGERS —Refer to Table 7 for nozzle sizes. Install piping using job data,piping drawings, and procedures outlined below. A typical pip-ing installation is shown in Fig. 50.1. Offset pipe flanges to permit removal of waterbox coverfor maintenance and to provide clearance for pipe clean-ing. No flanges are necessary with marine waterboxoption; however, water piping should not cross in front ofthe waterbox cover or access will be blocked.2. Provide openings in water piping for required pressuregages and thermometers. For thorough mixing andtemperature stabilization, wells in the leaving water pipeshould extend inside pipe at least 2 in. (51 mm).3. Install air vents at all high points in piping to remove airand prevent water hammer.4. Install pipe hangers where needed. Make sure no weightor stress is placed on waterbox nozzles or flanges.5. Water flow direction must be as specified in Fig. 51-53.NOTE: Entering water is always the lower of the 2 noz-zles. Leaving water is always the upper nozzle for cooleror condenser.6. Install waterbox vent and drain piping in accordance withindividual job data. All connections are 3/4-in. FPT.7. Install waterbox drain plugs in the unused waterboxdrains and vent openings.8. Install optional pumpout system or pumpout system andstorage tank as shown in Fig. 54-58.IMPORTANT: Accessory spring isolation packages areintended solely for non-seismic applications. Seismicapplications must be designed by a registered professionalin accordance with all applicable national and local codes.IMPORTANT: Chiller water nozzle connections to bedesigned by others in accordance with all applicablenational and local codes.CAUTIONRemove cooler and condenser liquid temperature andoptional pressure sensors before welding connecting pipingto water nozzles. Refer to Fig. 6-8. Replace sensors afterwelding is complete.Fig. 49 — 23XRV Accessory Spring Isolation(Shown with Accessory Soleplates)NOTE: The accessory spring isolators are supplied by Carrier forinstallation in the field.a23-1537CAUTIONFactory-supplied insulation is not flammable but can bedamaged by welding sparks and open flame. Protect insu-lation with a wet canvas cover.CAUTIONNever charge liquid R-134a refrigerant into the chiller ifthe pressure is less than 35 psig (241 kPa). Charge as a gasonly, with the cooler and condenser pumps running, until35 psig (241 kPa) is reached using the pumpdown mode onthe ICVC. Terminate the pumpdown mode using theICVC. Flashing of liquid refrigerant at low pressures cancause tube freeze-up and considerable damage.AIR VENTENTERINGCHILLEDWATERLEAVINGCHILLEDWATERLEAVINGCONDENSERWATERENTERINGCONDENSERWATERPRESSUREGAGESISOLATION VALVESISOLATION VALVESFig. 50 — Typical Nozzle Piping1016