Bard Q24A1 Installationair conditioner Instructions Manual

Manual 2100-522BPage 30 of 386. Some service requires the need to remove the unitfrom the wall including replacement of the indoorcoil and/or the outdoor coil. Also servicing theoutdoor fan motor or fan blade will requireremoving the unit from the wall if the unit isinstalled at a height that is not easily accessiblefrom the outside of the building.In order to remove the unit from the wall thefollowing procedure must be used:a. Turn off power to the unit at the remotelocation. Some units may have more than onepower supply.b. Disconnect field wiring at unit terminal blockand remove from unit.c. Disconnect condensate drain.d. Remove the lower skirting around the unit.e. Remove wall mounting brackets from wall oneach side of the unit.f. If unit is attached to duct work, remove uppercabinet extension by removing the top centerscrew only from the cabinet side panel.g. Remove screws that attach the duct work tothe unit flanges.This unit is equipped with four rollersmounted to the base. For ease of pulling unitout from the wall, you may want to removethe bottom service door which requiresremoval of the return air panel, and grip thefront flange of the base pan then pull straightout.7. Annual maintenance is required to make sure thatall of the systems are functioning properly.a. Check to make sure that the drains are notobstructed in any way.b. Remove any debris in the condenser section ofthe unit.c. Inspect and clean mist eliminator as describedbelow.d. Inspect and wash outdoor coil as necessary.MIST ELIMINATOR SERVICEA mist eliminator is supplied with the wall sleeve. Themist eliminator is constructed of an aluminum frameand mesh. The mist eliminator is located in the topsection of the wall sleeve and can be removed from theinside of the building without removing the unit fromthe wall. This requires that the ventilation package mustbe removed.It is recommended that the mist eliminator be inspectedannually and serviced as required. The mist eliminatorcan be inspected from the outside of the building bylooking through the outdoor grille. The mist eliminatorcan be serviced from the outside by using a vacuumcleaner. The outdoor grille must be removed. Use thevacuum to remove dirt and debris from the surface ofthe mist eliminator. If additional cleaning is required,the mist eliminator will have to be removed from thesleeve.The ventilation package will have to be removed to gainaccess tot he mist eliminator. If the blank off plateoption is used, it is not necessary to service the misteliminator. The steps necessary to remove each of thevent options are listed on the following pages.The mist eliminator can be cleaned by washing withsoap and water. The excess water should be shaken offthe mist eliminator before it is reinstalled.VENT OPTIONSBAROMETRIC FRESH AIR DAMPER (Standard)Before starting, make sure the power has been turnedoff. The return air grille panel must be removed. Thefresh air damper assembly can be seen on the back ofthe unit. See Figure 21.1. The fresh air damper is attached to the back of theunit with one screw on either side of theassembly. Both of the screws must be removed.2. Once the mounting screws are removed, tilt theassembly down and lift it out.The mist eliminator can be seen through the opening.The mist eliminator must be raised up and the bottomcan be pulled toward the front of the unit.ECONOMIZER OR COMMERCIAL ROOMVENTILATOR (Option)Before starting, make sure the power has been turnedoff. The return air grille panel must be removed. Theeconomizer (EIFM) or commercial room ventilator(CRV) can be seen after the panel has been removed.The CRV or EIFM must be removed to gain access tothe mist eliminator.1. The two mounting screws in the front of theEIFM or CRV must be removed.2. The power connectors for the CRV (located onthe right side of the unit) must be disconnected.Squeeze the tabs on the sides of the connectorand pull straight out. Unplug both of theconnectors.3. Slide the EIFM or CRV straight out of the unit.