Carrier 09DK Series Installation, Start-up And Service Instructions Manual

Contents

21SERVICEFan Guard Removal — On all sizes, remove eight 1/4 x14 x 5/8-in. long self-tapping hex head screws per guard andremove guard.Fan Adjustment1. Make certain condenser power is off.2. Remove fan guard.3. Remove cap and setscrews on fan hub.4. Adjust fan. See Fig. 22.5. Tighten fan hub securely on motor shaft with setscrewwhich bears against the key.6. Replace permagum and rubber cap over end of motorshaft to prevent moisture from causing fan to rust onshaft.Lubrication — Fan motors have permanently lubricatedbearings. No provisions are made for lubrication.Cleaning Standard Coils — Clean standard coils withstiff brush, vacuum cleaner, or compressed air. Low-pressurewater may be used to clean coils by removing fan guard andspraying coil from inside. Condenser fan motors are drip-proofbut not waterproof. Routine cleaning of coil surfaces is essen-tial to minimize contamination build-up and remove harmfulresidue. Inspect coils monthly and clean as required.Cleaning and Maintaining E-Coated Coils —Routine cleaning of condenser coil surfaces is essential tomaintain proper operation of the unit. Elimination of contami-nation and removal of harmful residue will greatly increase thelife of the coil and extend the life of the unit. The followingmaintenance and cleaning procedures are recommended aspart of the routine maintenance activities to extend the life ofthe coil.REMOVE SURFACE LOADED FIBERS — Debris such asdirt and fibers on the surface of the coil should be removedwith a vacuum cleaner. If a vacuum cleaner is not available, asoft brush may be used. The cleaning tool should be applied inthe direction of the fins. Coil surfaces can be easily damaged(fin edges bent over) if the tool is applied across the fins.NOTE: Use of a water stream, such as a garden hose,against a surface loaded coil will drive the fibers and dirtinto the coil. This will make cleaning efforts more difficult.Surface debris must be completely removed prior to usinglow velocity clean water rinse.PERIODIC CLEAN WATER RINSE — A periodic cleanwater rinse is very beneficial for coils that are applied incoastal or industrial environments. However, it is very impor-tant that the water rinse is made with very low velocity waterstream to avoid damaging the fin edges. Monthly cleaning isrecommended.ROUTINE CLEANING OF E-COATED COIL SUR-FACES — Monthly cleaning with E-Coat Enzyme CoilCleaner is essential to extend the life of coils. It is recom-mended that all coils including standard aluminum, pre-coated,copper/copper, or E-coated coils be cleaned with the E-CoatEnzyme Coil Cleaner as described below. Coil cleaning shouldbe part of the regularly scheduled maintenance procedures ofthe unit to ensure long life of the coil. Failure to clean the coilsmay result in reduced durability in the environment.E-Coat Enzyme Coil Cleaner is non-bacterial, biodegrad-able, and will not harm the coil or surrounding componentssuch as electrical wiring, painted metal surfaces, or insulation.Use of non-recommended coil cleaners is strongly discouragedsince coil and unit durability could be affected.The following field-supplied equipment is required for coilcleaning:• 2 1 /2 gallon garden sprayer• water rinse with low velocity spray nozzleFig. 22 — Location of Propeller on Motor Shaftfrom Outside of Orifice RingPROP LOCATION “A” in. (mm)Min Max60 Hz09DK020 3.12 (79.2) 3.38 (85.9)09DK024,028,044 3.62 (91.9) 3.88 (98.6)09DK034 Fan No. 1 and 3 3.62 (91.9) 3.88 (98.6)Fan No. 2 3.12 (79.2) 3.38 (85.9)50 Hz09DK024,028,044 1.56 (39.6) 1.68 (42.7)09DK034 Fan No. 1 and 3 3.12 (79.2) 3.38 (85.9)Fan No. 2 3.62 (91.9) 3.88 (98.6)

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