ALWAYS TEST PRESSURES WITH VALVE CONTROL KNOB SET ON HIGH.
The appliance must be isolated from the gas supply line by closing its individual manual gas shutoff valve (gas cock) during any pressure testing of the gas supply piping system that is equal to or exceeds pressures of 1/2 psig. (3.5 kPa).
High Altitude Orifice Chart
Elevation | Fuel | Orifice | Part No. |
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Size | |||||
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0 - 2000 ft. | Natural Gas | #38 | 129130 |
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(0 - 610 m) | Propane | 1.5 mm | 129146 |
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2001 - 4500 ft. | Natural Gas | #38 | Do Not Derate | ||
(611 - 1370 m) | Propane | #54 | 754517P | ||
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High Altitude Adjustment
Installation at high altitude locations (above 2500'), makes it necessary to compensate for the thinner air (less volume of air per cubic foot). Higher altitudes affect the atmospheric pressure and heat value of some gaseous fuels. The Allagash DVII requires adjustment for Propane fuel at high altitude, but not for Natural gas.
In the U.S.
THE DERATING KIT MUST BE INSTALLED BY AN AUTHORIZED SERVICE TECHNICIAN IN ACCORDANCE WITH THE MANUFACTURER’S INSTRUCTIONS AND ALL CODES AND REQUIREMENTS OF THE AUTHORITY HAVING JURISDICTION. THE INFORMATION STICKER MUST BE FILLED OUT BY THE INSTALLER AND AD- HERED TO THE APPLIANCE AT THE TIME OF THE CONVERSION. THE QUALIFIED SERVICE AGENCY PERFORMING THIS WORK ASSUMES RESPONSIBILITY FOR THIS DERATING.
For installations from 610 - 1370 meters (2000- 4500 ft.) the orifice size for natural gas is #38 and for propane gas #54.
SEE THE HIGH ALTITUDE ORIFICE CHART ON THIS PAGE.
See the stove Rating Plate for additional informa- tion. For high altitude installations consult the local gas distributor or the authority having jurisdiction for proper rating methods. If the installer must convert the unit to adjust for varying altitudes, the informa- tion sticker must be filled out by the installer and applied to the appliance at the time of the conversion.
In Canada:
This unit has been tested for installation at high altitudes in accordance with Canadian test standard
THE DERATING SHALL BE CARRIED OUT IN ACCOR- DANCE WITH THE REQUIREMENTS OF THE PROVIN- CIAL AUTHORITIES HAVING JURISDICTION AND IN ACCORDANCE WITH THE REQUIREMENTS OF THE
Derating Procedure
To derate this unit, install the appropriate orifice per the High Altitude chart.
1.Remove the two ¼” hex head screw that holds the burner tube/log support to the bottom of the stove.
2.Remove the burner tube/log support to expose the main burner orifice.
3.Remove the orifice and replace with the appropri- ate one from the high altitude kit.
4.Be sure to attach the high altitude conversion sticker provided with the kit to the rating plate on the appliance.
THIS STOVE HAS BEEN CONVERTED FOR USE AT AN ALTITUDE OF: ___________
Orifice Size: __________ Manifold Press. _____
Input Btu/Hr. _________ Fuel Type __________
Date of Conversion ___________
Figure 17. High Altitude Conversion Label.This sticker is included in all high altitude kits and must be applied to the stove when converted for high altitude .
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