Carrier 58CTA/CTX User Manual download pdf (Page 33)

A04127

Fig. 48 -- Using Tin Snips to Cut Tie Points

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.

CAUTION

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.

A04128

Fig. 49 -- Rounded End of Knockout

58CT

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Carrier 58CTA/CTX User Manual Page 33

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