INSTALLATION INSTRUCTIONS BCE3M*C & BCS3M*C

For all performance testing, units must be tested in theupflow orientation with the horizontal drain pan removed.Refrigerant Metering DeviceThese units are equipped with a factory-installed meteringdevice (TXV or piston). Ensure the indoor coil meteringdevice is properly sized for the outdoor unit being used.Upflow Application1.2.The air handler must be supported on the bottom onlyand set on solid floor or field-supplied support frame.Securely attach the air handler to the floor or supportframe.If installing a unit in an upflow application, remove thehorizontal drain pan.IMPORTANT - The horizontal drain pan is not requiredin upflow air discharge installations; its removalprovides the best efficiency and air flow.3.Place the unit in the desired location and slope unit.Connect return and supply air plenums as requiredusing sheet metal screws.4.Install units that have no return air plenum on a standthat is at least 14” from the floor. This will allow properair return.NOTE: When the unit is installed in horizontal applications,a secondary drain pan is recommended. Refer to localcodes.NOTE: This unit may be installed in left-hand or right-handair discharge horizontal applications. Adequate supportmust be provided to ensure cabinet integrity. Ensure thatthere is adequate room to remove service and accesspanels if installing in the horizontal position.Left-Hand Air Discharge1. Determine which plugs are required for drain lineconnections.2.With access door removed, remove drain line plugs toinstall drain lines.3.Set unit so that it is sloped toward the drain pan end ofthe unit (see figure 11).4.The left-hand air discharge horizontal configuration isshown in figure 2.AIR FLOWDrainsHORIZONTAL DRAIN PANIMPORTANT - REMOVE PANFOR BEST EFFICIENCYAND AIR FLOW.PLUGSFigure 2. Left-Hand Discharge Configuration5.HORIZONTAL DRAINCONNECTIONS(BOTH SIDES; NOTUSED)UP-FLOWDRAIN PANLEFT‐HAND DRAINSUP-FLOW DRAINCONNECTIONS (BOTHSIDES; USE ONE SIDEOR OTHER)Figure 1. Upflow ConfigurationIf the unit is suspended, the entire length of the cabinetmust be supported. If you use a chain or strap, use apiece of angle iron or sheet metal attached to the unit(either above or below) to support the length of thecabinet. Use securing screws no longer than 1/2 inchto avoid damaging the coil or filter. See figure 3. Usesheet metal screws to connect the return and supplyair plenums as required.ANGLE IRON OR SHEET METALHorizontal ApplicationsMAXIMUM 1/2”LONG SCREWELECTRICAL INLET CLEARANCE4 IN. (102 MM)IMPORTANTWhen removing the coil, there is possible danger ofequipment damage and personal injury. Be carefulwhen removing the coil assembly from a unit installedin right- or left-hand applications. The coil may tip intothe drain pan once it is clear of the cabinet. Support thecoil when removing it.507621-01AIR FLOWFRONT VIEWEND VIEWFigure 3. Suspending Horizontal UnitIssue 1810Page 5 of 23

Right-Hand Air DischargeFor horizontal right-hand air discharge, the following fieldmodifications are required.1. Remove and set aside blower and coil access panels.2.Remove brackets securing pan to unit. See figure 4.Figure 5Figure 43.Remove coil assembly, bottom drain pan andhorizontal drain pan as one unit from the air handler.See figure 5.4.Remove the blow-off prevention brackets, top cap anddrip pan between slabs. Move the horizontal drain panto the opposite side of the coil. See figure 6.NOTE: The 1.5- and 2-ton units do not have or requireblow-off prevention brackets or drip pan.Page 6 of 23Issue 1810Figure 6507621-01

5.Reinstall the top cap. Rotate the blow-off preventionbrackets 180º and reinstall using the same screws.Use the correct mounting holes; the brackets mustcover the hairpins. See figure 7.7.Reinstall the brackets that hold the coil and horizontaldrain pan in place. See figure 9.Figure 76.Slide coil assembly, bottom drain pan and horizontaldrain pan as one unit back into the air handler. Seefigure 8.Figure 98.Reinstall the blower and coil access panels.Figure 8507621-01Issue 1810Page 7 of 23

Condensate DrainThe air handler is provided with ¾” NPT condensate drain connections.IMPORTANTOn units of this type, where the blower “draws” rather than “blows” air through the coil, traps must be installed in thecondensate drain lines (primary and auxiliary, if used). Traps prevent the blower from drawing air through the drainlines into the air supply.ABOVEFINISHEDSPACE?SECONDARY (OVERFLOW) DRAIN LINEALWAYS RUN A SECONDARY (OVERFLOW) DRAIN LINE. IF NOTPOSSIBLE, INSTALL LOW VOLTAGE OVERFLOW SWITCH KIT.WIRE KIT TO SHUT DOWN COMPRESSOR PER INSTRUCTIONS.VENT MUST EXTENDABOVE HEIGHT OFCOIL DRAIN PAN BYTWO INCHES (51MM)PART #X3169NOVENTCLEAN OUTPRESS IN(DO NOT GLUE)USE TWO-PART 3/4” FEMALE SLIP INLET AND MALE ADAPTERWHEN OBSTRUCTIONS PREVENT DIRECT THREADING OFOVERFLOW SWITCH.1” X 3/4” X 3/4”REDUCINGTEE WITHPLUGAIR HANDLER DRAIN PANMAIN DRAINYESNOTE - WHEN AN AIR HANDLER IS LOCATEDABOVE A FINISHED SPACE, THE SECONDARYDRAIN PAN MUST HAVE A LARGER FOOTPRINTTHAN THE AIR HANDLER.WHEN A COIL IS LOCATED ABOVE A FINISHEDSPACE, A 3/4” (19.1MM) SECONDARY DRAIN LINEMUST BE: SECONDARYDRAIN PAN CONNECTED TO SECONDARY DRAIN PANORCONNECTEDTOTHESECONDARY(OVERFLOW) DRAIN OUTLET OF THE AIRHANDLER DRAIN PAN.P-TRAP1 # 49P66,J-TRAP # 91P90OR ANY PVC SCH40 P- OR J-TRAP 3/4”2”(51MM)TRAP MUST BE DEEP ENOUGH TO OFFSET MAXIMUM STATIC DIFFERENCES — GENERALLY,TWO INCHES (51MM).1 P-TRAP 49P66 REQUIRES A LARGER INSTALLATION SPACE THAN THE J-TRAP 91P90.2 PIPE NIPPLE PROVIDED IN BAG ASSEMBLY - SCH 80, 3/4” I. D. X 5” - 34K7401 (1): CUT THE PIPEIN HALF AND USE IT TO ROUTE THE MAIN DRAIN.TRAP DEPTHFOR NEGATIVE PRESSURE COILS (BLOWERAFTER COIL), A TRAP IS REQUIRED ON THEMAIN DRAIN LINE CONNECTED TO COIL.SEE LOCAL CODES FOR TRAPREQUIREMENTS ON SECONDARY DRAINS.TO APPROVEDDRAINDRAIN LINE SHOULDSLOPE A MINIMUM OFONE INCH PER 10 FEET(25MM PER 3 METERS)Figure 10. Typical Main and Overflow DrainIMPORTANTA field-fabricated secondary drain pan, with a drainpipe to the outside of the building, is required in allinstallations over a finished living space or in any areathat may be damaged by overflow from the main drainpan. In some localities, local codes may require asecondary drain pan for any horizontal installation.Page 8 of 23Issue 1810507621-01

Sloping the UnitNOTE: When installing drain line connection fittingsto the drain pan, hand tighten the fitting and use athread sealant. Over-tightening the fittings can splitconnections on the drain pan.Make sure the unit is sloped (similar to the slope shown infigure 11) (horizontal or upflow) so that the drain pan willempty completely without water standing in the pan.THIS CORNER SHOULD BE 5/8” ( /- 1/8”) HIGHERTHAN DRAIN CORNERTHIS CORNER SHOULD BE5/8” ( /- 1/8”) HIGHER THANDRAIN CORNERLEVELPLANEEANPLLVELEDRAIN CORNER4.If the secondary drain line is to be used, remove theplug or the knockout and route the drain line so thatwater draining from the outlet will be easily noticedby the homeowner. Refer to local codes for drain traprequirements on the secondary drain line.5.Check again to ensure drain ports and drain pan arefree of all debris.6.Plug and check any unused drain pan openings fortightness. Torque plugs to 30 in. lb. to prevent waterleaks or seepage from the drain pan.7.Install a 2” trap in the main (primary) drain lines asclose to the unit as practical (see figure 10). Make surethe top of the trap is below the connection to the drainpan to allow complete drainage of the pan.NOTE: Horizontal runs must have an anti-siphon airvent (standpipe) installed ahead of the horizontal run.See figure 10. An extremely long horizontal run mayrequire an oversized drain line to eliminate air traps.Figure 11. Sloping the DrainInstall Condensate DrainThe air handler is equipped with ¾” NPT condensate drainconnections.NOTE: Do not operate air handler without a trap inthe main (primary) drain. The condensate drain is onthe negative pressure side of the blower; therefore, airbeing pulled through the condensate line will not allowpositive drainage without a proper trap.IMPORTANTOn some pans, the primary and secondary drain holeshave knockouts. Confirm primary and secondary drainsare open.8.1. These units are equipped with a drain pan, whichincludes green (main drain) and red (secondary drain)plugs. Unscrew the plugs to remove them beforeinserting condensate drain fittings. See figure 12.NOTE: Check local codes before connecting the drainline to an existing drainage system.9.UNSCREW PLUGSAND CONNECTPROPERLY SIZEDFIELD-PROVIDEDFITTINGS ANDDRAIN LINES.DRAIN PAN3.Insulate the drain lines where sweating could causewater damage.Test Condensate DrainTest the drain pan and drain line after installation:GREEN MAINDRAIN PLUG1. Pour several quarts of water into drain pan. Useenough water to fill both the drain trap and the line.RED SECONDARYDRAIN PLUGFigure 122.Route the drain line to the outside or to an appropriatedrain. Drain lines must be installed so they do not blockservice access to the front of the air handler. A 24”clearance is required for filter, coil, or blower removaland service access.After removal of drain pan plugs, check the drain portto see if holes have been drilled. If not drilled, use a19/32” bit to drill out the primary drain hole; use a 3/8”drill bit for the secondary drain hole. Remove

INSTALLATION INSTRUCTIONS BCE3M*C & BCS3M*C SERIES AIR HANDLER The Clean Air Act of 1990 bans the intentional venting of refrigerant (CFCs, HCFCs and HFCs) as of July 1, 1992. Approved methods of recovery, recycling or reclaiming must be followed. Fines and/