Carrier COMFORTLink PURON 48PM20 Installation Instructions Manual

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Carrier COMFORTLink PURON 48PM20 Installation Instructions Manual Manual pdf 18 page image

18Step 11 — Install Outdoor Air HoodPerform the following procedure to install the outdoor-air hood onunits equipped with an economizer, two-position damper, ormanual outdoor air damper:1. Remove blank panel from return end of unit (hood section).Save the screws. See Fig. 20 for shipping location ofcomponents.2. Hood sides are fastened to sides of outdoor air opening.Remove the hood sides and save the screws (3 each side).3. Remove the bracket holding the bottom half of the hood inthe shipping position. Remove the hood bottom half andfilters (or manual dampers on units so equipped) fromoutdoor section.HOOD TOP(BOTTOM HALF)HOOD TOP(TOP HALF)HOODSIDEHOODSIDERETURN AIRSECTIONC06283Fig. 20 -- Power Exhaust or Barometric Relief DamperMounting DetailsNOTE: On units without economizers, the components areattached to the unit basepan. To access the components, remove thepanel below the outdoor air intake section.4. Remove inner filter track from shipping position in outdoorsection. Position inner filter track so track is facing outwardfrom the unit. Install the filter track with 4 screws provided.5. Apply seal strip (provided) to back flange of both hoodsides where hood side connects to the unit back panel. (SeeFig. 21.)6. Apply seal strip (provided) to top flange of both hood sideswhere hood sides connect to the hood top panels. (See Fig.21.)7. Install hood sides to the back panels using the screws fromitem 2. The sloped flanges point outward. The drip edges ofthe side panels should face outward as well. The filterguides to the hood sides. The flanges of the filter guidesshould face inward to hold the filters in place. (See Fig. 21.)8. Apply seal strip along the entire length of the bottom flangeof the hood top. (See Fig. 21.)9. Install the bottom part of the hood top using 4 screwsprovided. (See Fig. 21.)10. Remove the packaging from filters (3) and install into thefilter tracks. Slide the filters to the sides then place the lastfilter into the center of the filter track.NOTE: For units with manual dampers, replace the end filterswith the manual dampers. Install the filter in the center between themanual dampers.SEALSTRIPLOCATIONHOODSIDE ADDSEALSTRIPADDSEALSTRIPHOODSIDEADDSEALSTRIPADDSEALSTRIPUNITBACKPANELFILTERFILTERSMANUALDAMPER(IF EQUIPPED)UPPER HOODTOP PANELLOWER HOODTOP PANELSIDEFILTERGUIDEBRACKET SIDEFILTERGUIDEFILTERRETAINERTRACKNOTE: Units with manual damper only use one filter.C06284Fig. 21 -- Bracket and Hood Positioning48PM20-- 28

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