Rheem RSNA-B Series manual Accessory Equipment, Common Supply/Return Concentric Air Diffuser

		ACCESSORIES
ACCESSORY EQUIPMENT
Accessory	Model	Accessory
Description	Application	Model No.
Roofcurbs		RXSG-AAA08 (8" [203 mm] Height)
	RSNA-B	RXSG-AAA14 (14" [356 mm] Height)
		RXSG-AAA24 (24" [610 mm] Height)
Supply & Return Diffusers	RSNA-B	RXRN-BD15
Economizers (Downflow ONLY)	RSNA-B	RXRE-CAA30 (3 Position)
		RXRD-CAM10 (Fully Modulating)
Fresh Air Damper	RSNA-B	RXRF-FAB1 (Motorized-35%)
		RXRF-FAA1 (Fixed-35%)
Rectangular to Round Transition (Downflow)	RSNA-B	RXMC-CA02 (16" [406 mm] Ducts)
		RXMC-CA03 (18" [457 mm] Ducts)
Filter Kit	RSNA-B	RXRY-B01
Low Ambient Control	RSNA-B	RXRZ-A18
High Pressure Control	RSNA-B	RXAB-A02
Low Pressure Control	RSNA-B	RXAC-A02
Sideflow Rectangular to Round Transition	RSNA-B	RXMC-BA01
LP Conversion Kits	RSNA-B	RXGJ-EP84W (White-Rodgers Gas Valve)
		RXGJ-EP85H (Honeywell Gas Valve)
Canadian High Altitude Kit (for Natural Gas only*)	RSNA-B	RXRX-AH01

*If a particular unit is to be converted to operate on LP (propane) for elevations above 2000 ft. [609.6 m] in Canada, the existing Natural Gas to LP Conversion Kits for the subject models already contain the necessary orifices and instructions to de-rate the input for 2000-4500 ft. [609.6-1371.6 m] Canadian applications.

[ ] Designates Metric Conversions

COMMON SUPPLY/RETURN

CONCENTRIC AIR DIFFUSER

SUPPLY/RETURN DIFFUSER

Designed to convert a side by side or an over and under arrange- ment into a concentric distribution of air. The diffuser is flush mounted, completely insulated, assembled, and internally baffled to provide four way supply air distribution with a center return. To make the assembly complete and ready to fit into a 2' [0.61 m] x 4' [1.22 m] suspended ceiling grid, the diffuser includes adjustable supply louvers, hanging rings, anti-sweat gasket, and round flanges for use with flexible ducts.

Model No.	Diameter	Shipping Wt.	Dimension A
RXRN-	Inches [mm]	Lbs. [kg]	Inches [mm]
BD15	16 [406]	90 [40.82]	201/2 [521]

NOTE: The location of the combination supply and return diffuser should not exceed 10 feet [3.05 m] above the floor level for units @ 1000 CFM [472 L/s] or less and 12 [3.66 m] to 14 feet [4.27 m] above the floor level for units with CFM greater than 1000 [472 L/s]. If the diffuser is installed with a greater distance than recommended above, the supply air may become stratified above the required comfort area causing uncomforta- ble conditions.

AIRFLOW/PRESSURE DROP INFORMATION (INCHES W.C. [kPa])

Accessory	Approximate CFM [L/s]-Supply Air
	1300 [614]	1575 [743]	1800 [850]	2200 [1038]
Plenum & Supply/Return Duct	.07 [.017]	.10 [.024]	.12 [.030]	.17 [.042]
Diffuser	.09 [.022]	.13 [.032]	.16 [.040]	.24 [.060]
Economizer	.06 [.015]	.09 [.022]	.11 [.027]	.17 [.042]

SUPPLY AIR/PERFORMANCE

Diffuser Airflow CFM [L/s]		Range of Throw Ft. [m]
800	[378]-1200 [566]	14 [4.27]-16 [4.88]
1600	[755]-2000 [944]	18 [5.49]-28 [8.53]

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