Owner`s manual
01-01 Page 16 29863C
DV450S DIRECT VENT ROOM HEATER
GAS LINE INSTALLATION
The Valve is located near the lower Right Rear Corner of the
appliance. Install the Gas Supply Line to the backside of the
unit to ease installation of the unit to the Supply Line, a flexible
connector and Manual Shut - Off Valve are supplied. The Manual
Shut - Off Valve should be installed onto the Supply Line, ahead
of the flex. All connections must be checked for leaks with a soap
and water solution or Gas Sniffer.
GAS PRESSURE
For natural gas, the minimum inlet gas supply pressure is 4.5
inches water column, and the maximum inlet gas pressure is 7.0
inches water column, for the purpose of input adjustment. Input
rate is 40,000 Btu/hr. For propane gas, the inlet gas supply pres-
sure must be at least 11.0 inches water column and a maximum
14.0 inches water column. Input rate is 38,000 Btu/hr.
Manifold pressure for this Heater is 1.6 - 3.5 inches water column
for natural gas and 6.3 - 10.0 inches water column for propane
gas. This Heater has a variable adjust manifold.Pressure taps
are located on the front of the valve for both inlet and outlet
pressure.
FUEL CONVERSION
For conversion of the DV450S unit, use Kit # 844-9230 to
convert from Natural Gas to LP.
A. Gas and Power Supply.
1. Shut off the Gas Supply to the unit.
2. Unplug the Blower Cord from the Power Supply.
3. Carefully remove the Logs and Burner from the
Firebox. See Figure A for burner removal.
B. Burner Orifice.
Adjust Air Shutter Adjustment Screw as necessary to slide the Air
Shutter off the Burner Orifice.
1. Loosen and remove the Retaining Nut on the Burner Orifice
with a 5/8” wrench. See Figure B.
2. Replace the Burner Orifice with the .073 LP Main Burner
Orifice supplied in kit. Reposition the Air Shutter onto the Burner
Orifice. Refer to Section IX., on the following page, for High
Altitude Installation.
C. Pilot Orifice.
1. Remove top of pilot hood. See Figure C.
2. Use an Allen Wrench to remove the pilot injector orifice. See
Figure D.
3. Replace the pilot hood ensuring that it is seated and aligned.
5. Replace burner into the unit.
Figure A
Figure B
Figure C
Figure D