Majestic Appliances UVS36RN Safety Devices, Description, Orifice Conversion Instructions, 20002211

Safety Devices

Adequate combustion and ventilation air must be pro- vided. The flow of combustion and ventilation air MUST NOT be obstructed.

Provide adequate clearances around the air opening into the combustion chamber; and adequate accessibili- ty clearance for servicing and proper operation. NEVER obstruct the front opening of the heater or cover the top and bottom louvres (grilles).

These heaters are equipped with a pilot system fea- turing an Oxygen Depletion Sensor (O.D.S.) shut-off device. The O.D.S. pilot will shut down the heater when there is not enough fresh air available.

Report any parts damaged in shipment to your dealer.

Description

The UVS vent-free heaters uses a frame window with screen mesh that does not use any catalytic filters.

This model is available as Natural or Propane gas, equipped with a standing pilot.

Design-certified to ANSI Z21.11.2a-2003 Unvented Room Heaters.

The UVS33 model is shipped at 20,000 BTU/hr. It includes orifices for operation at 15,000 and 10,000 BTU/hr. When operating at 10,000 BTU/hr, the unit is approved for bedroom use. Based on the National Fuel Gas Code and local codes, please match the correct orfice size and BTU's to corresponding room size. This conversion must not be completed in the field. Once final rate is established, remaining orifices are to be discarded, not left behind with the fireplace.

Orifice Conversion Instructions

1.Locate burner with tiles, pilot shield and orifice.

2.Unscrew two hex nuts connecting pilot shield to burner with tiles. Move pilot shield to right. (Fig. 2)

3.Remove sheet metal screws at left and right side of burner with tiles and remove burner.

4.Use 7/16" wrench to remove orifice. (Fig. 3) Install desired orifice in place of orifice just removed. See Table 3 . Use approved pipe compound for pipe threads.

5.Remove air shutter, if necessary (Refer to Table 1), from burner pan by removing shutter retaining screw then air shutter. (Fig. 4)

6.Install correct air shutter on burner pan. Replace shutter retaining screw. Adjust the air shutter to the appropriate settings as listed in Table 1.

7.Reinstall burner with tiles and pilot shield. Check for leaks with soapy water solution.

UVS33/36 Vent-Free Heaters

		Burner with		Pilot Shield
	Orifice	Tiles	Hex Nut
				Pilot
Air
Shutter
				Hex
				Nut
		Log Supports		Sheet
CO101a	Sheet Metal Screw			Metal Screw

Fig. 2 Manifold assembly and orifice location.

Orifice

		CO102
Fig. 3 Replace orifice.
Front	Air Shutter	Burner Pan
View	Retaining
	Screw
	Air Shutter
	Adjustment	Air Shutter
		CO103

Fig. 4 Use appropriate air shutter and adjust according to Table 1.

Clearance to Combustibles

Top of unit to ceiling	36" (914 mm)
Front of unit to combustibles	36' (914 mm)
Appliance
Top	0" (0 mm)
Bottom	0" (0 mm)
Sides	0" (0 mm)
Back	0" (0 mm)
Perpendicular Sidewall	6" (152 mm)

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