Bryant 310AAV, 310JAV Ventilation from Outdoors, Downflow Installation, Upflow Installation

					1 SQ IN.
		DUCTS			PER 4000
					BTUH*
		TO
	OUTDOORS
12″ MAX			D		12″
1 SQ IN.			VENT		MAX
	A
PER 2000		AIR	THROUGH		F
BTUH*			ROOF		1 SQ IN.
		DUCTS
					PER
					4000
			CONFINED SPACE		BTUH*
DUCTS					OUTDOORS
TO
OUTDOORS							A02098
					1 SQ IN.		Fig. 9—Removing Bottom Closure Panel
					PER
					4000
1 SQ IN.					BTUH*
	B			E	G
PER 2000
BTUH*					12″
″			C		MAX	SIDE RETURN AIR INLET
12 MAX
				12″ MAX		These furnaces are shipped with bottom closure panel installed in
						bottom return-air opening. This panel MUST be in place when
	AIR DUCTS		DUCT		1 SQ IN.	only side return air is used.
						→ NOTE: Side return-air openings can be used in UPFLOW and
			TO		PER 4000
			OUTDOORS		BTUH*	most HORIZONTAL configurations. Do not use side return-air
*Minimum dimensions of 3 in.
						openings in DOWNFLOW configuration.
NOTE: Use any of the following						LEVELING LEGS (IF DESIRED)
combinations of openings:
A & B C & D D & E F & G					A02165	In upflow position with side return inlet(s), leveling legs may be
						used. (See Fig. 10.) Install field-supplied, 5/16 X 1 1/2 in. (max)
Fig. 8—Confined Space: Air for Combustion and
						corrosion-resistant machine bolts, washers and nuts.
	Ventilation from Outdoors					NOTE: Bottom closure must be used when leveling legs are used.
						It may be necessary to remove and reinstall bottom closure panel
						to install leveling legs. To remove bottom closure panel, see Fig.
c. If combustion		air is taken from the			outdoors through a	9.
						To install leveling legs:
single opening or duct (horizontal or vertical) commencing
						1. Position furnace on its back. Locate and drill a hole in each
within 12 in. of the top of the confined space, the opening
							bottom corner of furnace. (See Fig. 10.)
and duct must have at least 1 sq in. of free area per 3000
Btuh of the total input for all equipment within the confined						2.	For each leg, install nut on bolt and then install bolt and nut in
space and not less than the sum of the areas of all vent							hole. (Install flat washer if desired.)
connectors in the confined space. Equipment clearances to						3. Install another nut on other side of furnace base. (Install flat
the structure shall be at least 1 in. from the sides and back
							washer if desired.)
and 6 in. from the front of the appliances. See Table 2 and
						4. Adjust outside nut to provide desired height, and tighten inside
Fig. 8.
							nut to secure arrangement.
When ducts are used, they must be of the same cross sectional area
						5. Reinstall bottom closure panel if removed.
as the free area of the openings to which they connect. The
						Step 2—Downflow Installation
minimum dimension of ducts must not be less than 3 in.
		INSTALLATION				NOTE: For downflow applications, this furnace is approved for
						use on combustible flooring when any one of the 3 accessories are
Step 1—Upflow Installation						used:
BOTTOM RETURN AIR INLET						•	Special Base, KGASB
These furnaces are shipped with bottom closure panel installed in						• Cased Coil Assembly Part No. CD5 or CK5
bottom return-air opening. Remove and discard this panel when						• Coil Box Part No. KCAKC
bottom return	air is	used. To	remove	bottom closure panel,		1. Determine application being installed from Table 3.

perform the following:		2.	Construct hole in floor per Table 3 and Fig. 11.
1.	Tilt or raise furnace and remove 2 screws holding bottom filler
		3.	Construct plenum to dimensions specified in Table 3 and Fig.
	panel. (See Fig. 9.)
			11.
2.	Rotate bottom filler panel downward to release holding tabs.
		4.	If downflow subbase, KGASB is used, install as shown in Fig.
3.	Remove bottom closure panel.
			12. If Coil Assembly Part No. CD5 or CK5 or Coil Box Part
4.	Reinstall bottom filler panel and screws.		No. KCAKC is used, install as shown in Fig. 13.

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