Unvented Room Heaters, 20002211 | Majestic Appliances UVS33RP

UVS33/36 Vent-Free Heaters

UVS33 / UVS36

Certiﬁed To

ANSI Z 21.11.2a-2003

Unvented Room Heaters

Units: A41A00, A41B00, B41AS0, B41BS0

Gas Inlet and Manifold Pressures

	Natural Gas	LP
Minimum Inlet Pressure	5.5" w.c.	11.0" w.c.
Maximum Inlet Pressure	14.0" w.c.	14.0" w.c.
Manifold Pressure	3.5" w.c.	10.0" w.c.

Table 3 Gas supply pressures.

The installation of your Majestic heater must conform with local codes, or in the absence of local codes, with National Fuel Gas Code, ANSI Z223.1/NFPA 54 — latest edition. (EX- CEPTION: Do not derate this appliance for altitude. Maintain the manifold pressure at

3.5inches w.c. for Natural Gas and 10 inches w.c. for LP gas.)

High Elevations

Input ratings are shown in BTU per hour and are certiﬁed without deration from elevations up to 4,500 feet (1,370m) above sea level.

Nuisance outages may occur at altitudes above 4,500 feet (1,370m) if dirt, dust, lint and/or cob- webs are allowed to accumulate on burner and/or ODS pilot. Monthly inspection and cleaning is recommended for altitudes above 4,500 feet (1,370m)

For elevations above 4,500 feet (1,370m), instal- lations must be in accordance with the current ANSI Z223.1/NFPA 54 and/or local codes having jurisdiction.

Gas Supply Pressures

This heater must be isolated from the gas supply piping system by closing its individual manual shut-off valve during any pressure equal to or less than 1/2 psig (3.45 kPa).

The heater and its individual shut-off valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.45 kPa).

Gas Line Connection

If gas piping from the source to the heater location has not been accomplished, install the required pipe. Con- sult local codes to assure proper pipe size.

The gas pipeline can be brought in through the right or left side of the heater, as well as the bottom. Knockouts are provided at convenient locations to allow for the gas pipe installation and testing of any gas connection. It is most convenient to bring the gas line in from the right side, as this allows fan installation or removal without disconnecting the gas line.

NOTE: The gas line connection can be made with prop- er 3/8" copper tubing, 1/2" rigid pipe or an approved ﬂex connector, then reduced to 3/8" to the heater. Because some municipalities have some additional local codes, it is always best to consult your local authority. Consult the current National Fuel Gas Code, ANSI Z223.1/NFPA 54.

Always check for gas leaks using a 50/50 solu- tion of liquid soap and water. Apply water/soap solution with brush only - do not over apply.

NEVER test with an open ﬂame.

The gas control is equipped with a captured screw type pressure test point, therefore it is not necessary to pro- vide a 1/8" test point up stream of the control.

When using copper or ﬂex connector use only approved ﬁttings. When using black iron pipe, always provide a union so the gas line can be easily disconnected for burner or fan servicing. Use shut off valve before union or ﬂex connector. See gas speciﬁcation for pressure details and ratings. NOTE: If ﬂex connector is used, it must be kept inside of the heater. (Fig. 9)

	1/2" Gas Supply
	1/2" x 3/8" Shut Off Valve
	3/8" Nipple
	3/8" Union
	3/8" Nipple
FP297
Fig. 9	Typical gas supply installation.

Electrical Connection

(If fan is used)

When installed, the heater must be electri- cally connected and grounded in accor- dance with local codes or, in the absence of local codes:

U.S. Installations: Follow local codes and the National Electrical Code, ANSI/NFPA No. 70.

20002211