Installation In Upflow And Downflow Applications - Carrier 58MXA Installation, Start-Up, And Operating Instructions Manual

Deluxe 4–way multipoise fixed-capacity direct-vent condensing gas furnace

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Table of Contents

4. Adjust outside nut to provide desired height, and tighten inside

nut to secure arrangement.

NOTE: Bottom closure must be used when leveling legs are used.

See Bottom Closure Panel section.

Step 2—Installation in Upflow and Downflow Applica-

tions

NOTE: For downflow applications, this furnace is approved for

use on combustible flooring when special base (available from

manufacturer) Part No. KGASB0201 ALL is used. Special base in

not required when this furnace is installed on manufacturer's Coil

Assembly Part No. CD5 or CK5, or Coil Box Part No. KCAKC is

used.

1. Determine application being installed from Table 1.

2. Construct hole in floor per dimensions specified in Table 1

and Fig. 13.

3. Construct plenum to dimensions specified in Table 1 and Fig.

13.

4. If downflow subbase (KGASB) is used, install as shown in

Fig. 14.

If Coil Assembly Part No. CD5 or CK5 or Coil Box Part No.

KCAKC is used, install as shown in Fig. 15.

NOTE: Remove furnace perforated, discharge duct flanges when

they interfere with mating flanges on coil on downflow subbase.

To remove furnace perforated, discharge duct flange, use wide

duct pliers or duct flange tool to bend flange back and forth until

it breaks off. Be careful of sharp edges. (See Fig. 16.)

FURNACE

CASING

WIDTH

Downflow Applications on Non-Combustible Flooring

Downflow Applications on Combustible Flooring Using