Bryant 340MAV Iii. Hazardous Locations, Installationin a Garage, I. Leveling Legs If Desired

III. HAZARDOUS LOCATIONS

18-IN. MINIMUM

TO BURNERS

A93044

Fig. 16—Installation in a Garage

WARNING: When furnace is installed in a residential garage, it must be installed so that burners and ignition sources are located a minimum of 18 in. above floor. The furnace must be located or protected to avoid physical damage by vehicles. When furnace is installed in a public garage, airplane hangar, or other building having a hazardous atmosphere, unit must be installed in accor- dance with NFGC or NSCNGPIC. (See Fig. 16.)

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.

II.INSTALLATION IN UPFLOW OR DOWNFLOW APPLICATIONS

NOTE: For downflow applications, this furnace is approved for use on combustible flooring when special base (available from manufacturer) Part No. KGASB0201ALL 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 CD5 or CK5 or Coil Box KCAKC is used, install as shown in Fig. 20.

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. 21.)

		INSTALLATION			WARNING: Do not bend duct flanges inward as shown
I. LEVELING LEGS (IF DESIRED)					in Fig. 21. This will affect airflow across heat exchangers
					and may cause limit cycling or premature heat exchanger
When furnace is used in upflow position with side inlet(s), leveling
					failure. Remove duct flange completely or bend it inward
legs may be desired. (See Fig. 17.) Install field-supplied,
					a minimum of 210° as shown in Fig. 21.
corrosion-resistant 5/16-in. machine bolts and nuts.
5⁄16″				NOTE: For 140 size unit when installed in downflow orientation,
				cut the white jumper wire off between terminals PL1-7 and PL1-9.
		5⁄16″		Do not cut white jumper between terminals PL1-7 and PLI-11.
				Refer to Fig. 30 for location of jumper. Cut jumper close to
				connector and remove wire to avoid a short circuit.
1 3⁄4″
				III. INSTALLATION IN HORIZONTAL APPLICATIONS
			→
					CAUTION: The entire length of furnace MUST be
					supported when furnace is used in a horizontal position to
		1 3⁄4″
					ensure proper draining. When suspended, bottom brace
					supports sides and center blower shelf. When unit is
					supported from the ground, blocks or pad should support
					sides and center blower shelf area. Failure to follow this
5⁄16″					caution will result in intermittent unit operation or per-
					formance satisfaction.
		5⁄16″		These furnaces can be installed horizontally in either horizontal
				left or right discharge position. In a crawlspace, furnace can either
		1 3⁄4″		be hung from floor joist or installed on suitable blocks or pad.
		1 3⁄4″		Furnace can be suspended from each corner by hanger bolts and
				angle iron supports. (See Fig. 22.) Cut hanger bolts (4 each 3/8-in.
			A89014	all-thread rod) to desired length. Use 1 X 3/8-in. flat washers,
	Fig. 17—Leveling Legs			3/8-in. lockwashers, and 3/8-in. nuts on hanger rods as shown in
NOTE: The maximum length of bolt should not exceed 1-1/2 in.				Fig. 22. Dimples are provided for hole locations. (See Fig. 2.)
					AIR DUCTS
1. Position furnace on its back. Locate and drill a 5/16-in.				I. GENERAL REQUIREMENTS
diameter hole in each bottom corner of furnace. (See Fig.				The duct system should be designed and sized according to
12.) Holes in bottom closure panel may be used as guide				accepted national standards such as those published by: Air
locations.				Conditioning Contractors Association (ACCA), Sheet Metal and
			—14—