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 31 page image

316. If solution is too weak, add more antifreeze until desiredstrength is reached, then circulate solution through coilfor 15 minutes or until concentration is satisfactory.7. Remove upper line from reservoir to reversible pump.Drain coil to reservoir and then close service valve.8. Break union and remove reservoir and its lines.9. Leave coil flanges or coupling open and auxiliary drainvalves open until spring.AIR DRYING METHOD OF COIL PROTECTION (Unitand coil must be level for this method.)1. Close coil water supply and return main valves.2. Drain coil as described in procedures for AntifreezeMethods of Coil Protection.3. Connect air supply or air blower to inlet header connec-tion and close its drain connection.4. Circulate air and check for air dryness by holding mirrorin front of open vent in outlet header drain connection.Mirror will fog if water is still present.5. Allow coil to stand for a few minutes; repeat step 4 untilcoil is dry.Field-Installed Coils (39LA,LD Only)When a 39LA or 39LD unit is ordered without the coil, the fol-lowing loose parts are shipped: (see Fig. 37)• bottom coil baffle• side hairpin baffle• side header baffle• top coil baffleThese parts should be field-installed onto the coil beforeplacing the coil into the unit. Once the baffles are installed,install the coil with the downstream bottom of the coil attachedto the upright mounting flange as shown in Fig. 36. Adjustthe coil and then attach the top coil baffle to the top flangeprovided.Coil RemovalHORIZONTAL UNIT SLANT COIL REMOVAL (39LAUnits)NOTE: Item numbers are in Fig. 38.1. Refer to Fig. 4 for service area clearance.2. Disconnect piping (Item 5).3. On top panel (Item 3), remove screws located directlyabove side panels (Items 2 and 6). Top panels may be re-moved from unit to provide more workspace, but it is notrequired.4. Remove right side panels (Item 6).5. If accessory is present, remove accessory side panel(Item 1) on left side of unit. Detach filter track supportbracket if upstream accessory is a filter.6. Remove screws from inside baffle (Item 13). Leave baffleattached to left side panel (Item 2).7. Remove left side panel (Item 2).8. Remove condensate baffle (Item 8).9. Remove coil holddown screws (Items 9 and 11).10. Remove baffle screws (Item 4) from downstream side ofcoil.11. Tilt coil (Item 10) away from coil support panels (Items 7and 12) and slowly slide coil out of unit.12. Replace coil by reversing preceding Steps 1-11.BOTTOM COILBAFFLESEE TOPFLANGE DETAILBOTTOMMOUNTINGFLANGETOP FLANGE DETAILTOP COILBAFFLE SIDE HEADERBAFLESIDE HAIRPINBAFFLEFig. 37 — Field-Installed Coils (39LA and LD only)