Carrier Packaged and Dedicated Outdoor Air Units 50HC

Warning: This procedure requires trained personnel with PPE!

Hood shipped in knock-down form and assembled to a metal support tray using plastic stretch wrap?

Assembly’s metal tray attached to the basepan and also attached to the damper using two plastic tie-wraps?

Filter access panel removed to gain access to the hood?

Two screws holding the metal tray to the basepan located and removed?

Panel underneath the two-position damper removed if necessary to remove the screws?

Two plastic tie-wraps securing the assembly to the damper located and cut?

Hood assembly (with metal tray) carefully lifted through the filter access opening and assembled per the steps outlined in Economizer Hood and Two-Position Hood on page 12?

Panel under the damper reattached if removed?

Warning: Be careful not to damage any wiring during the procedure.

Hood located in the return air compartment?

Upload a photo of the filter access panel before removal

Upload a photo of the two plastic tie-wraps before cutting

Two plastic tie-wraps located and cut without damaging any wiring?

Upload a photo of the hood assembly lifted through the filter access opening

Hood assembly lifted through the filter access opening?

Enter the steps followed in Economizer Hood and Two-Position Hood on page 12

Remove three hex screws on the HACR enclosure

Remove the front cover of the HACR enclosure

Insert the shaft all the way with the cross pin on the top of the shaft in the horizontal position

Tighten the locking screw to secure the shaft to the HACR

Turn the handle to the OFF position with red arrow pointing at OFF

Install the handle on to the painted cover horizontally with the red arrow pointing to the left

Secure the handle to the painted cover with two screws and lock washers supplied

Install field-fabricated ductwork inside curb

Install accessory thru-base service connection package

Prepare bottom condensate drain connection to suit planned condensate line routing

Install condensate line trap and piping

Remove three hex screws on the NFD enclosure

Remove the front cover of the NFD enclosure

Ensure the NFD is at OFF position

Insert the shaft with the cross pin on the top of the shaft in the horizontal position

Measure the tip of the shaft to the top surface of the pointer

Tighten the locking screw to secure the shaft to the NFD

Turn the handle to the OFF position with red arrow pointing at OFF

Install the handle on to the painted cover horizontally with the red arrow pointing to the left