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

41HORIZONTAL OR VERTICAL UNIT — VERTICAL COILREMOVAL (39LB,LC,LF,LH Units) — Item numbers are inFig. 50 unless otherwise indicated.1. Refer to Fig. 10 for service area requirements.2. Disconnect piping (Item 6).3. Horizontal Unit, 39LB and 39LC — On top panel(Item 4) remove screws located directly above side panels(Items 2 and 7). Top panels may be removed from unit toprovide more workspace, but it is not required.Vertical Unit, 39LF and 39LH — Through fan accessdoor (Item 2, Fig. 48), remove screws (Item 3, Fig. 48)holding angle (Item 4, Fig. 46) to top of coil panels(Item 7, Fig. 48).Remove rear panel (Item 17, Fig. 48) and remove baffleangle screws (Item 5) holding top baffle to coil.4. Remove side panel(s) (Item 7).NOTE: Vertical units may require support of fan sectionafter removal of side panels.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 (Item 8) from inside baffle (Item 3).Leave baffle attached to left side panel (Item 2).7. Slide coil and header end baffle from unit.8. Replace coil by reversing preceding Steps 1-7.Changing Coil HandNOTE: Electric heat coil hand cannot be changed.NOTE: The coil cover panel is not part of the coil. Removecover panel from end of unit. New holes must be cut in coilcover panel. Original holes must be plugged and insulated.New side panels may be necessary when changing coil hand.NU-FIN COILS — The NuFin coil is airflow direction sensi-tive, especially when used in dehumidifying applications.Hydronic versions are counterflow circuited for full gravitydraining when installed level.Correct installation will result in the typical bottom inlet onleaving air face and top outlet on entering air face of coil, aself-venting design. This will ensure cold air contact with coldwater, and warm air with hot water.Coil repositioning for opposite hand application will com-promise one or more of these characteristics. However, therewill be those situations where this may prove acceptable.As a general rule, a change from counterflow circuiting toparallel flow for sensible heating and cooling applications willresult in a 5% drop in net capacity per row of coil. In one andtwo row heating coils, the actual drop may not be measurable,thus of insignificant consequence.It is important that the airflow direction of the NuFin coil beadhered to when latent cooling is possible. Significant moisturecarryover from the face of the dehumidifying coil will result ifLEGENDFig. 50 — Horizontal or Vertical Unit — Vertical Coil Removal (39LB,LC,LF,LH Units)1 — Accessory Side Panel 5 — Baffle Angle Screw2 — Left Side Panel 6 — Piping3 — Inside Baffles 7 — Right Side Panel4 — Top Panels 8 — Baffle Screw