Carrier 58CTA/CTX instruction manual Using Tin Snips to Cut Tie Points

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Fig. 48 - Using Tin Snips to Cut Tie Points

58CT

!CAUTION

CUT HAZARD

Failure to follow this caution may result in personal injury.

Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses and gloves when handling parts and servicing furnaces.

NOTE: Vent connector length for connector sizing starts at furnace vent elbow. The 4-in. (102 mm) vent elbow is shipped for upflow configuration and may be rotated for other positions. Remove the 3 screws that secure vent elbow to furnace, rotate furnace vent elbow to position desired, re-install screws. The factory-supplied vent elbow does NOT count as part of the number of vent connector elbows.

The vent connector can exit the door through one of 5 locations on the door.

1.Attach the single wall vent connector to the furnace vent elbow, and fasten the vent connector to the vent elbow with at least two field-supplied, corrosion-resistant, sheet metal screws located 180_ apart.

NOTE: An accessory flue extension KGAFE0112UPH is available to extend from the furnace elbow to outside the furnace casing. If flue extension is used, fasten the flue extension to the vent elbow with at least two field-supplied, corrosion-resistant, sheet metal screws located 180_ apart. Fasten the vent connector to the flue extension with at least two field-supplied, corrosion resistant sheet metal screws located 180_ apart.

2.Vent the furnace with the appropriate connector as shown in Fig. 35-47.

3.Orient the door to determine the correct location of the door knockout to be removed.

4.Remove the correct U-shaped knockout in door.

NOTE: A number of techniques can be used to remove these knockouts as seen in Fig. 48 through 52. The knockout in the bottom of the door is unique due to its flanging and is more easily removed by first cutting the two tie points at the edge of the door, using aviation-type tin snips. (See Fig. 48.) A sharp blow to the rounded end of the knockout (See Fig. 49.) will separate more tie points and allow the knockout to be pulled loose. (See Fig. 50.) Remove all burrs any sharp edges.

For the rectangular J-box knockout, use tin snips along the door edge and use a sharp blow with a hammer to remove the knockout. Remove any burrs and sharp edges.

For the knockouts in the other locations on the door (top and sides), tin snips can also be used along the door edges; however, the preferred method is to use a hammer and screwdriver to strike a sharp blow (See Fig. 51.) directly to the knockout tie points or use a hammer in the upper left corner of the desired knockout. (See Fig. 52.) Remove any burrs and sharp edges.

NOTE: If a knockout does not come out after two sharp blows, pull and snip as needed to remove the knockout. Additional blows may cause damage to the door.

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Fig. 49 - Rounded End of Knockout

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