Bard WA4842 Installation Instructions Manual

Contents

Bard WA4842 Installation Instructions Manual Manual pdf 8 page image

Manual 2100-401APage 8 of 21SHIPPING DAMAGEUpon receipt of equipment, the carton should bechecked for external signs of shipping damage. Ifdamage is found, the receiving party must contact thelast carrier immediately, preferably in writing,requesting inspection by the carrier’s agent.GENERALThe equipment covered in this manual is to be installedby trained, experienced service and installationtechnicians.The refrigerant system is completely assembled andcharged. All internal wiring is complete.The unit is designed for use with or without duct work.Flanges are provided for attaching the supply and returnducts.These instructions explain the recommended method toinstall the air cooled self-contained unit and theelectrical wiring connections to the unit.While these instructions are intended as a generalrecommended guide, they do not supersede any nationaland/or local codes in any way. Authorities havingjurisdiction should be consulted before the installation ismade. See Page 3 for information on codes andstandards.Size of unit for a proposed installation should be basedon heat loss calculation made according to methods ofAir Conditioning Contractors of America (ACCA). Theair duct should be installed in accordance with theStandards of the National Fire Protection Associationfor the Installation of Air Conditioning and VentilatingSystems of Other Than Residence Type, NFPA No.90A, and Residence Type Warm Air Heating and AirConditioning Systems, NFPA No. 90B. Where localregulations are at a variance with instructions, installershould adhere to local codes.DUCT WORKAll duct work, supply and return, must be properly sizedfor the design air flow requirement of the equipment.Air Conditioning Contractors of America (ACCA) is anexcellent guide to proper sizing. All duct work orportions thereof not in the conditioned space should beproperly insulated in order to both conserve energy andprevent condensation or moisture damage.These instructions and any instructions packaged withany separate equipment, required to make up the entireair conditioning system should be carefully read beforebeginning the installation. Note particularly any tagsand/or labels attached to the equipment.Design the duct work according to methods given by theAir Conditioning Contractors of America (ACCA).When duct runs through unheated spaces, it should beinsulated with a minimum of one inch of insulation.Use insulation with a vapor barrier on the outside of theinsulation. Flexible joints should be used to connect theduct work to the equipment in order to keep the noisetransmission to a minimum.A 1/4 inch clearance to combustible material for thefirst three feet of duct attached to the outlet air frame isrequired. See Wall Mounting Instructions and Figures 3and 4 for further details.Ducts through the walls must be insulated and all jointstaped or sealed to prevent air or moisture entering thewall cavity.Some installations may not require any return air duct.A metallic return air grille is required with installationsnot requiring a return air duct. The spacing betweenlouvers on the grille shall not be larger than 5/8 inch.NOTE: If no return air duct is used, applicableinstallation codes may limit this cabinet toinstallation only in a single story structure.Any grille that meets with 5/8 inch louver criteria maybe used. It is recommended that Bard Return Air GrilleKit RG2 through RG5 or RFG2 through RFG5 beinstalled when no return duct is used. Contactdistributor or factory for ordering information. If usinga return air filter grille, filters must be of sufficient sizeto allow a maximum velocity of 400 fpm.CONDENSATE DRAINA plastic drain hose extends from the drain pan at thetop of the unit down to the unit base. There areopenings in the unit base for the drain hose to passthrough. In the event the drain hose is connected to adrain system of some type, it must be an open or ventedtype system to assure proper drainage.FILTERSWA6022 AND WA4842 ONLYA 1-inch throw away filter is supplied with each unit.The filter slides into position making it easy to service.This filter can be serviced from the outside by removingthe service door. A 1-inch washable filter and a 2-inchpleated filter are also available as optional accessories.The internal filter brackets are adjustable toaccommodate the 2-inch filter by bending the metal tabsholding the 1-inch filter down. There are two tabs oneach side of the filter.NOTE: WA6023 and WA4843 models require the use ofa return air filter grille.