2. Frick
  3. Safety Procedures and Precautions

Frick Safety Procedures and Precautions Service guide

  • Hello! I've reviewed the safety procedures document for refrigeration air handling equipment. This document focuses on several critical aspects of handling refrigeration systems, including procedures for installation, operation, and maintenance. It includes guidelines on electrical safety, refrigerant piping, coil maintenance, and corrosion prevention. I'm ready to help you with any questions you may have regarding these procedures.
  • Who should install, operate, and maintain refrigeration equipment?
    What should be done before performing any service or maintenance?
    What should be done if the system is not charged with refrigerant immediately after evacuation?
    What should you check when connecting the refrigerant lines to the coil?
    What kind of solution should be used to clean coils?
SAFETY PROCEDURES AND PRECAUTIONS FOR
REFRIGERATION AIR HANDLING EQUIPMENT
A. General Precautions
 Onlyexperiencedandqualiedpersonnelshouldinstall,operate,andmaintainrefrigerationequipment.
 Frequentvisualinspections andcontinuous monitoringshould beemployedto preventthe escapeof refrigerant.
Electronicrefrigerantdetectorsshouldbeusedforsensingandwarningofthepresenceofrefrigerantintheatmo-
sphere.
 Temperaturemonitoringinstrumentsshouldbeusedtowarnagainstlossofrefrigerationinanyareawherearisein
temperaturecouldbeharmfultopeopleorproduct.
B. Electric Power Supply
 Checktheelectricalcharacteristicsontheunitnameplate.Makesurethepowersupplyisthesameasthename-
plate.
 Onlyqualiedelectriciansshouldinstallthepowersupply.Allworkshouldbedoneinaccordancewiththegoverning
codes.
 Disconnectthepowersupplytotheunitbeforeperforminganyserviceormaintenance.Thedisconnectshouldbe
lockedinthe“OFF”position.
C. Refrigerant Piping
 Avoidhydraulicshockorhammeringinrefrigerantliquidlinesthatmaycontainliquidrergerant.Hydraulicshockcan
occurinhotgaslinescausedbyliquidbuildup.Liquidslugstravelingathighvelocitycancausedamagetorefrigerant
connectionsonthecoilplusdamagetootherpipingandcontrolvalves.
 Avoidhydrauliclockupcausedbytrappedliquid.Withanincreaseinambienttermperaturearoundtheconnedliquid,
theexpansionpressurecouldcauserefrigerantlinestoburst.
 Refrigerantlinesmustbesizedproperlytoassuresatisfactorysystemoperation.Therefrigerantconnectionsizes
furnishedonthecoilsmaynotbethesamesizerequiredtomeetsystemperformancecriteria.
 ForHFCrefrigerants,pipingsystemsmustbeproperlyevacuatedtoremovenoncondensablesandmoisturepriorto
charging.Avacuumof500to1000micronsisrequiredtoremovemoisture.
 Ifthesystemisnotchargedwiththerefrigerantimmediatelyafterevacuation,orinstallationofpiping,a100%dry
nitrogenchargemustbeintroducedintothesystemtopreventinternalcorrosivedamagetothecoilsandpiping.This
isespecalllytrueofsteelpipingandcoils.
 Whenisolatingcoilsorpipingforserviceormaintenancemakesureallliquidlinesandcoilsarefreeofrefrigerant
beforeclosingisolationhandvalves.
 Beforeconnectingtherefrigerantlinestothecoil,makesurethepipingandcontrolvalvesontheunitareproperly
supported.Theunitrefrigerationconnectionsarenotdesignedtocarrytheweightofvalvesandpiping.
D. Coils
 Refrigerationcoilsmustnotbeusedwithrefrigerantotherthanthatstampedonthenameplates.Coilmustnotbe
subjectedtohigherpressurethandesignedworkingpressurestampedonthenameplates.
 Thecoilsareshippedwithaholdingchargeofdrynitrogen.Iftheunithasbeendamagedintransit,resultinginthe
lossoftheholdingcharge,theleakshouldbefoundbeforeinstallingtheunit.Pressurizetheunitto150psigwith
nitrogentondtheleak.
E. Coil Cleaning
 Anysolutionusedtocleancoilsorkillbacteriamustnotbecorrosivetometalsandmaterialsusedinthemanufactur-
ingoftheunit.
F. Corrosive Atmosphere
 Theunitsmustnotbeinstalledinatmospheresthatmaybecorrosivetothematerialsofconstruction.Thiscould
resultinreducedperformanceandcoilcorrosion.
G. Rotating Equipment
 Donotoperatefansorbeltdriveswithoutguardsinplace.
200-20 SB NOV 2008
Johnson Controls
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Phone: 815-288-3859 • FAX: 815-288-1665
www.johnsoncontrols.com
Form 200-20 SB (2008-11)
Supersedes: S200-20 SB (OCT 00)
Subject to change without notice
Published in USA • GUI
2008 Johnson Controls Inc. - ALL RIGHTS RESERVED
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