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Resumen del manual
4 Direct Expansion Coils ......................................................................... 3 Filter Quantities.................................................................................... 8 Freezing Temperatures ........................................................................ 6 Inspection ............................................................................................ 2 Installation ........................................................................................... 2 Internal Isolation .................................................................................. 4 Maintenance ........................................................................................ 4 Motors & Drives ................................................................................... 2 Replacement Parts ............................................................................... 8 Section Assembly.................................................................................5 Shipment of Sections...........................................................................7 Start-up................................................................................................ 4 Steam Coils...........................................................................................2, 3 Water Coils ........................................................................................... 3 Weights ................................................................................................ 7 Inspection Inspection All parts should be carefully inspected to determine ifany damage was incurred in shipment. Any shortage and/or claims for damage should beimmediately reported to the delivering carrier followedby filling a claim for shortages and/or damages. Shipment of Units Depending on the unit size and accessories included, the shipment may be made in two or more sections. Handling Special care should be taken when handling andassembling component sections of the unit. Roughhandling at the job site can result in damaged bearings, bent shaft, etc. All units are shipped on wooden skids. It is recommended that units not be moved removed from skids until they are at a place of installation. The mounting legs/rails provided for isolators should be usedwhen lifting units into place. Suspended Units Unit sizes 03 through 41 may be ceiling suspended fromthe mounting legs/based rails with 5/8” diameter rods(furnished by others). These rods will pass through the 11/16” diameter mounting holes provided. Unit sizes 50, 65, and 75 cannot be ceiling suspended. Installation It is very important that the unit be installed in a levelposition to prevent distortion and to insure properdamper operation and coil drainage. Allow sufficient space around the unit for propermaintenance. Major factors to be considered are filter removal for cleaning or replacement, accessto all removal panels, removal of coils and shaft ifever necessary, lubrication access and motor belt adjustment. Canvas duct connections should be used between the unit and both supply and return air ducts. Units are furnished with 1 1/4” F.P.T. Drain connection on each side of the coil section. The drain line from the drain pan connection must be adequately pitched and should have a water seal of sufficient depth to compensate for the air pressure within the units. (See Condensate Drain Traps on page 4.) When the unit is located on the roof, it must be mountedon support beams that span load bearing walls. If thisis not done, excessive vibration may occur due to theresiliency of the roof. Fan noise is a function of the fan design, volume flow, pressure, and the efficiency of the fan. Present methodsof measuring fan noise do not evaluate the pure tonesgenerated by some fans and these tones can beobjectionable when radiated into occupied spaces. Therefore, on critical applications we recommend extrasound attention in the octave band containing the tone. Motors & Drives All units will normally be shipped with motor and driveinstalled. When mounting a motor on the adjustable base (Installedon the unit) extreme care should be taken to insureproper alignment and belt tension. All electrical work should be done in strict accordance with local codes and regulations. Steam Coils Type “J” and “NFS” coils have supply and return connections on the same end. Types “R”, “S”, and “RA” coils have supply and return connections on oppositeends. Type “NFD” coils have supply connections one each end of the coil , with a single return connection, one end only. All piping should be in accordance with acceptedindustry standards and local codes. Support all pipingindependent of coil and provide adequate swing joints inall piping to absorb expansion and contraction strains. Run return piping the full size of the coil return connection from the coil to a dirt pocket. (do not use reducingfittings.) Install drip traps in steam mains ahead of coils. Do notdrip steam ...