Carrier 58MTB Installation, Start-up, And Operating Instructions Manual

Also see for 58MTB: User's information manual Owner's manual Service and maintenance instructions

ELECTROSTATIC DISCHARGE (ESD) PRECAUTIONSPROCEDUREUNIT DAMAGE HAZARDFailure to follow this caution may result in damage to unitcomponents.Electrostatic discharge can affect electronic components.Take precautions during furnace installation and servicing toprotect the furnace electronic control. Precautions will pre-vent electrostatic discharges from personnel and hand toolswhich are held during the procedure. These precautions willhelp to avoid exposing the control to electrostatic dischargeby putting the furnace, the control, and the person at the sameelectrostatic potential.1. Disconnect all power to the furnace. Multiple disconnects maybe required. DO NOT TOUCH THE CONTROL OR ANYWIRE CONNECTED TO THE CONTROL PRIOR TO DIS-CHARGING YOUR BODY’S ELECTROSTATIC CHARGETO GROUND.2. Firmly touch the clean, unpainted, metal surface of the furnacechassis which is close to the control. Tools held in hand duringgrounding will be discharged.3. After touching the chassis, you may proceed to service thecontrol or connecting wires as long as you do nothing torecharge your body (moving or shuffling feet, touchingungrounded objects, etc.).4. If you touch ungrounded objects, firmly touch a clean,unpainted metal surface of the furnace again before touchingcontrol or wires.5. Use this procedure for installed and uninstalled (ungrounded)furnaces.6. Before removing a new control from its container, dischargeyour body’s electrostatic charge to ground to protect thecontrol from damage. If the control is to be installed in afurnace, follow items 1 through 4 before bringing the controlor yourself in contact with the furnace. Put all used and newcontrols into containers before touching ungrounded objects.7. An ESD service kit (available from commercial sources) mayalso be used to prevent ESD damage.INTRODUCTIONThe model 58MTB 4-way multipoise, Gas-Fired, Category IV,condensing furnace is available in model sizes ranging from inputcapacity of 60,000 to 120,000 Btuh as a direct vent (2-pipe)application as well as a non-direct vent (1-pipe) application.APPLICATIONSMINOR PROPERTY DAMAGEFailure to follow this caution may result in minor propertydamage.Local codes may require a drain pan under entire furnace andcondensate trap when a condensing furnace is used in an atticapplication or over a finished ceiling.Step 1—GeneralSome assembly and modifications are required for furnacesinstalled in any of the 4 applications shown in Fig. 1. All drain andpressure tubes are connected as shown in Fig. 6. See appropriateapplication instructions for these procedures.Step 2—Upflow ApplicationsIn an upflow application, the blower is located below the burnersection, and conditioned air is discharged upwards.CONDENSATE TRAP LOCATION (FACTORY-SHIPPEDORIENTATION)The condensate trap is factory installed in the blower shelf andfactory connected for UPFLOW applications. A factory-suppliedtube is used to extend the condensate trap drain connection to thedesired furnace side for field drain attachment. See CondensateTrap Tubing (Factory-Shipped Orientation) section for drain tubeextension details. (See Fig. 5.)CONDENSATE TRAP TUBING (FACTORY-SHIPPEDORIENTATION)NOTE: See Fig. 6 or tube routing label on main furnace door toconfirm location of these tubes.1. Collector Box Drain, Inducer Housing Drain, Relief Port, andPressure Switch TubesThese tubes should be factory attached to condensate trap andpressure switch ready for use in upflow applications. Thesetubes can be identified by their connection location and alsoby a color label on each tube. These tubes are identified asfollows: collector box drain tube (blue label), inducer housingdrain tube (violet label or molded), relief port tube (greenlabel), and pressure switch tube (pink label).2. Condensate Trap Drain TubeThe condensate trap drain connection must be extended forfield attachment by doing the following:a. Determine location of field drain connection. (See Fig. 2 or6.)NOTE: If internal filter or side Filter/Media Cabinet is used, draintube should be located to opposite side of casing from return ductattachment to assist in filter removal.b. Remove and discard casing drain hole plug button fromdesired side.c. Install drain tube coupling grommet (factory-supplied inloose parts bag) in selected casing hole.d. Slide drain tube coupling (factory-supplied in loose partsbag) through grommet ensuring long end of coupling facesblower.e. Cement 2 factory-supplied 1/2-in. street CPVC elbows tothe rigid drain tube connection on the condensate trap. (SeeFig. 6.) These elbows must be cemented together andcemented to condensate trap drain connection.Fig. 4—Return-Air TemperatureA050046006→