Carrier 39LA Installation, Start-up And Service Instructions Manual

Also see for 39L Series: Installation, Operation, and Start-Up Instructions

Contents

Carrier 39LA Installation, Start-up And Service Instructions Manual Manual pdf 4 page image

4PREINSTALLATION1. Check items received against packing list. Notify Carrierof any discrepancy.2. Refer to Fig. 4 for service area requirements.3. To transfer unit from truck to storage site, refer to riggingdetails in Fig. 5 and section on unit rigging for properhandling. See Table 1 for component weights.4. Do not stack unit components or accessories during stor-age. Stacking can cause damage or deformation.5. If unit is to be stored for more than 2 weeks prior to in-stallation, observe the following precautions:a. Choose a dry storage site that is reasonably leveland sturdy to prevent undue stress or permanentdamage to the unit structure or components. Do notstore unit on vibrating surface. Damage to station-ary bearings can occur. Set unit off ground if inheavy rain area.b. Remove all fasteners and other small parts fromjobsite to minimize theft. Tag and store parts in asafe place until needed.c. Cover entire unit with a tarp or plastic coverall.Extend cover under unit if stored on ground.Secure cover with adequate tiedowns or storeindoors. Be sure all coil connections have protec-tive shipping caps.d. Monthly — Remove tarp from unit, enter fansection through access door or through fan inlet,and rotate fan and motor slowly by hand to redis-tribute the bearing grease and to prevent bearingcorrosion.Rigging (Fig. 5) — All 39L units can be rigged by meansof the lifting brackets on bottom of unit.Units are shipped fully assembled. Do not remove shippingskids or protective covering until unit is ready for final place-ment. Use slings and spreader bars as applicable to lift unit. Donot lift unit by coil connections or headers.Do not remove protective caps from coil piping connectionsuntil ready to connect piping.Do not remove protective cover or grease from fan shaft un-til ready to install sheave.Lay rigid temporary protection such as plywood walkwaysin unit to prevent damage to insulation or bottom panel duringinstallation.Suspended Units — Figure 6 shows overhead suspen-sion of unit using optional factory-supplied suspensionchannels.Each support channel consists of 2 pieces, the smaller ofwhich fits inside the larger one. This allows the channel to beadjusted to the required length for installation.Channels are shipped on top of the unit. The 2 sections ofeach channel are shipped one inside the other, and are held inplace during shipping by the panel screws in the top panel.Hardware required for installation of suspension channels isshipped in a package inside the fan section.At least 2 suspension channels are shipped with each fanand coil unit. One or more extra channels will be supplieddepending on the number of accessories ordered. Be sure toinstall all the suspension channels shipped with a unit. Refer to39L Isolator Mounting (Suspended Unit) certified drawing fordetails.To install suspension channels:1. Remove panel screws to free suspension channels for in-stallation. Replace screws in top panel.2. Adjust channel to required length by sliding one channelsection inside the other. The channel must extend at least9 in. but not more than 12 in. beyond the edge of the unit.Set length of channel by installing factory-supplied boltsthrough the overlapping channel sections.3. Mount unit to suspension channel using factory-suppliednuts and bolts through 7/16-in. diameter holes in unit lift-ing bracket.4. Install field-supplied suspension rods through 9/16-in. di-ameter holes provided at outer edges of channel. Be surehanger rods are securely fastened in place.Service Clearance — Provide adequate space for unitservice access (fan shaft and coil removal, filter removal, mo-tor access, damper linkage access, etc.) as shown in Fig. 4.Condensate Drain — To prevent excessive build-up ofcondensate in drain pan, adequate trap clearance must be pro-vided beneath the unit as indicated in Fig. 7. See Installation,Condensate Drain section (page 8) for additional details.External Vibration Isolators — Install vibration iso-lators per certified drawings, and in accordance with the jobspecifications and the instructions of the vibration isolatormanufacturer. The coil piping must be isolated or have a flexi-ble connection to avoid coil header damage because of unitmotion. A flexible connection should be installed at the fan dis-charge.Figure 6 shows isolation location for floor mounting oroverhead suspension of unit.If a fork lift truck is used, lift only from heavy end of skid.Minimum recommended fork length is 48 inches.