DV425TR DIRECT VENT ROOM HEATER
HIGH ALTITUDE OPERATION
In Canada, this unit is approved from 0 to 4500 feet above sea level. Installation of this stove at altitudes above 4500 feet is subject to field test of the individual installation and approval by the local authority having jurisdiction.
In the United States, input ratings of this unit are based on sea level operation, and shall not be changed for operation at elevations up to 2000 feet. For operation at elevations above 2000 feet, this stove shall be reduced at the rate of 4% for each 1000 feet above sea level.
Exception: As permitted by the authority having jurisdiction.
To adjust stove for operation above 2000 feet the burner orifice may need to be changed. The orifice is located beneath the logset so it is necessary to first remove the logs. To do so please refer to the following detailed instructions to achieve optimum performance of your stove.
WARNING ! The following procedure should only be undertaken by a qualified and certified gas appliance installer.
1.Remove front (if installed), glass, and logs (if installed.)
2.Remove log/burner pan: First remove screws then lift the front of pan vertically and slide pan to one side and pull out of firebox. See page 12.
3.Remove burner plate.
4.Remove main burner orifice using a 5/8" wrench.
5.Replace orifice with the proper size as indicated in the chart below for your gas type and venting installation.
6.
7.
8.Install logs, refer to page 14 for correct place- ment.
9.Replace glass door and front.
CAUTION: DISCONNECT ANY ELECTRICAL CORDS AND TURN OFF GAS SUPPLY TO UNIT BEFORE PROCEEDING.
Equivalent burner orifice sizes at high altitudes (Includes 4% Input Reduction For Each 1000 Feet)
| ALTITUDE: | 3000 | 4000 | 5000 | 6000 | 7000 | 8000 | 9000 | 10000 | |
| TOP VENT: |
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| Natural Gas | 36(.106) | 36(.106) | 37(.104) | 38(.101) | 39(.099) | 40(.098) | 40(.095) | 41(.096) | 41(.096) |
| Propane | 52(.063) | 52(.063) | 52(.063) | 53(.059) | 53(.059) | 53(.059) | 54(.055) | 54(.055) | 54(.055) |
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| REAR VENT: |
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| Natural Gas | 41(.096) | 41(.096) | 42(.093) | 43(.089) | 44(.086) | 44(.086) | 45(.082) | 45(.082) | 46(.081) |
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| Propane | 53(.059) | 53(.059) | 53(.059) | 54(.055) | 54(.055) | 54(.055) | 55(.052) | 55(.052) | 55(.052) |
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02/01 | Page 49 |
