ICP PGN324 Installation Instructions Manual

Contents

22FIGURE 18 Burner Rack RemovedOUTDOOR FANUNIT OPERATION HAZARDFailure to follow this caution may result in damage tounit components.Keep the condenser fan free from all obstructions toensure proper cooling operation. Never place articleson top of the unit.CAUTION!1. Remove 6 screws holding outdoor grille and motor totop cover.2. Turn motor/grille assembly upside down on top cover toexpose fan blade.3. Inspect the fan blades for cracks or bends.4. If fan needs to be removed, loosen setscrew and slidefan off motor shaft.5. When replacing fan blade, position blade so that thehub is 1/8 in. away from the motor end (1/8 in. of motorshaft will be visible) (See Fig. 11).6. Ensure that setscrew engages the flat area on themotor shaft when tightening.7. Replace grille.ELECTRICAL CONTROLS AND WIRINGInspect and check the electrical controls and wiringannually. Be sure to turn off the electrical power to the unit.Remove access panel to locate all the electrical controlsand wiring. Check all electrical connections for tightness.Tighten all screw connections. If any smoky or burnedconnections are noticed, disassemble the connection,clean all the parts, re--strip the wire end and reassemble theconnection properly and securely.After inspecting the electrical controls and wiring, replaceall the panels. Start the unit, and observe at least onecomplete cooling cycle to ensure proper operation. Ifdiscrepancies are observed in operating cycle, or if asuspected malfunction has occurred, check each electricalcomponent with the proper electrical instrumentation. Referto the unit wiring label when making these checks.If no refrigerant leaks are found and low performance issuspected, refer to Checking and Adjusting RefrigerantCharge section.INDOOR AIRFLOWThe heating and/or cooling airflow does not requirechecking unless improper performance is suspected. If aproblem exists, be sure that all supply-- and return--airgrilles are open and free from obstructions, and that the airfilter is clean.METERING DEVICESRefrigerant metering device is a fixed orifice and is locatedin the distributor assembly to the indoor coil.LIQUID LINE STRAINERThe liquid line strainer (to protect metering device) is madeof wire mesh and is located in the liquid line on the inlet sideof the metering device.TROUBLESHOOTINGRefer to the Troubleshooting Chart (Table 10--12) fortroubleshooting information.START--UP CHECKLISTUse the Start--Up Checklist at the back of this manual.Table 6—Filter Pressure Drop Table (in. wc)FILTER SIZE CFM500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 230020X20X1 0.05 0.07 0.08 0.1 0.12 0.13 0.14 0.15 — — — — — — — — — — —20X24X1 — — — — 0.09 0.1 0.11 0.13 0.14 0.15 0.16 — — — — — — — —24X30X1 — — — — — — — 0.07 0.08 0.09 0.1 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18