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Resumen del manual
Turn off accessory heater power switch if applicable. 2. Remove economizer hood top panel from the return side of the unit. See Fig. 22. Keep screws and panel next to the unit. 3. Open economizer hood package found on the top skid. 4. Remove red shipping tape that attaches the outside air temperature (OAT) sensor to the economizer assembly. Using two #8 fasteners, found in the hood package, attach the OAT sensor to the economizer according to Fig. 23. NOTE: See label attached to economizer for OAT installing details. 5. Remove horizontal return duct cover panel and cut the wire ties that hold the hood divider to the economizer assembly. Slide hood divider off from the two slots holding it in place and place next to the unit. See Fig. 24. 32 33 OAT Sensor Hood Top Panel A09689 Fig. 22 -- Economizer Hood Top Panel Removal OAT Sensor A09690 Fig. 23 -- Oat Sensor Installed 6. Replace horizontal return duct cover panel. Screw in place ensuring all seams are air and watertight. 7. Install the 2 angle filter brackets to the right and left hood side panels respectively with the #10 screws provided. See Fig. 25. 8. Assemble hood according to Fig. 26 screwing together with provided #10 sheet metal screws. 9. Install assembled hood over the economizer opening in the replacement return chamber panel. See Fig. 27. Screw in place through pre-punched holes. Make sure all seams are air and watertight. NOTE: The two wires that connect to the outside air temperature sensor (OAT) should remain accessible. 10. Connect the outside air temperature sensor (OAT) to the economizer per wiring diagram. 11. Open the filter clips on the inside of the hood top. Insert the aluminum filter into the hood and close the clips to hold in place. See Fig. 28. 12. To replace 12 x 20 x1 (304.8mm x 508mm x 25.4mm) air filters, open the filter access door (horizontal return duct cover panel), remove old filters and install new disposable filters in filter rack. See Table 13 for filter part number. Table 13 – Filter Part Number DESCRIPTION PART NUMBER Indoor Coil Air Filter 12 x 20 x 1 (304.8 x 508 x 25.4 mm) KH01AA312 NOTE: The economizer control settings and the filters are accessible through the filter access door. 13. Economizer controls are set to a standard factory setting. Nevertheless, you can adjust these settings through the filter access door. Review the settings in the Operation section: (2.) The standard economizer controller has a factory setting of “C” for the outdoor air temperature changeover and 63_F (17_C) for the supply air (mixed air) temperature sensor. The outdoor air temperature changeover setting is adjusted on the sensor by setting the dip switches on the sensor. The ABCD potentiometer on the economizer control should be set to the “D” position. (3.) The low ambient compressor lockout switch setting is fixed at 42_F (5.6_C). (4.) The minimum position for the outdoor air damper can be configured at the controller. When not using a CO2 sensor, the DCV Max potentiometer must be completely closed (CCW) for the Minimum Position potentiometer to function correctly. (5.) Settings for the optional outdoor enthalpy sensor, indoor enthalpy sensor, and CO2 sensor can also be configured at the controller. 14. Replace the filter access panel. Screw in place ensuring all seams are air and watertight. 15. Install all economizer accessories then power HVAC unit and test cycle economizer. 604D-- --A 34 Hood Divider Horizontal Return Duct Cover Panel Hood Divider (Removed) A09691 Fig. 24 -- Horizontal Return Duct Cover Panel Removal Filter Angle Bracket Right Hood Left Hood Side Panel Side Panel Filter Angle Bracket A09692 Fig. 25 -- Filter Angle Bracket Installation 604D-- --A 35 Right Hood Side Panel Hood Top Panel Left Hood Side Panel Hood Divider A09693 Fig. 26 -- Economizer Hood Assembly A09694 Fig. 27 -- Economizer Hood Installation Filter Clips Aluminum Filter A09695 Fig. 28 -- Filter Installation (See Through View) 604D-- --A 36 Large Chassis To install the Vertical Economizer on the large chassis perform the following procedure: 1. Turn off unit power supply and install lockout tag. ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death. Before installing or servicing system, always turn off main power to system and install lockout tag. There may be more than one disconnect switch. Turn off accessory heater power switch if applicable. ! WARNING 2. Remove economizer hood top panel from the return side of the unit. See Fig. 29. Keep screws and panel next to the unit. 3. Remove red shipping tape that attaches the outside air temperature (OAT) sensor to the economizer assembly and place sensor next to the unit. 4. Remove horizontal return duct cover panel and cut the wire ties that hold the hood divider to the economizer assembly. Slide hood divider off from the two slots holding it in place and place next to the unit. See Fig. 30. 5. Replace horizontal return duct cover panel. Screw in place ens...