Bryant 355MAV Size gas piping based on the high-fireinput, PROCEDURE 4-HAZARDOUSLOCATIONS

CAUTION: The furnace can operate in the high-fire mode when certain fault conditions occur. The following precautions should be taken:

1.Size gas piping based on the high-fire input.

2.Check the high-fire input and adjust it per the main literature instructions. NEVER assume the high-fire input rate is not important for low-fire-only installation.

PROCEDURE 3—FURNACE LOCATION RELATIVE TO COOLINGEQUIPMENT

The cooling coil must be installed parallel with or on downstream side of furnace to avoid condensation in heat exchanger. When installed parallel with a furnace, dampers or other means used to control flow of air must prevent chilled air from entering furnace. If dampers are manually operated, they must be equipped with a means to prevent operation of either unit unless the damper is in full-heat or full-cool position.

PROCEDURE 4—HAZARDOUS LOCATIONS

18-IN. (457.2 mm)

MINIMUM TO BURNERS

A93044

Fig. 16—Installation in a Garage

WARNING: When the furnace is installed in a residential garage, the burners and ignition sources must be located at least 18 in. above the floor. The furnace must be located or protected to avoid physical damage by vehicles. When the furnace is installed in a public garage, airplane hangar, or other building having a hazardous atmosphere, the furnace must be installed in accordance with the National Fire Protection Association, Inc. requirements. (See Fig. 16.)

INSTALLATION

PROCEDURE 1—LEVELING LEGS (IF DESIRED)

When furnace is used in upflow position with side inlet(s), leveling legs may be desired. (See Fig. 17.) Install field-supplied, corrosion-resistant 5/16-in. machine bolts and nuts.

NOTE: The maximum length of bolt should not exceed 1-1/2 in.

1.Position furnace on its back. Locate and drill a 5/16-in. diameter hole in each bottom corner of furnace. (See Fig. 17.) Holes in bottom closure panel may be used as guide locations.

2.For each hole, install nut on bolt and then install bolt and nut in hole. (Install flat washer if desired.)

3.Install another nut on other side of furnace base. (Install flat washer if desired.)

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.

PROCEDURE 2—INSTALLATION IN UPFLOW AND DOWNFLOW APPLICATIONS

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 is 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. 18.

3.Construct plenum to dimensions specified in Table 1 and Fig. 18.

4.If downflow subbase (KGASB) is used, install as shown in Fig. 19. If Coil Assembly Part No. CD5 or CK5 or Coil Box Part No. KCAKC is used, install as shown in Fig. 20.

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