Vermont Castings Jefferson Direct Vent/Natural Vent Gas Heater
Connect the Gas Supply Line
Check the Rating Plate attached by a steel cable to the firebox, to confirm that you have the appropriate firebox for the type of fuel to be used. The Jefferson may be converted from one gas to another using the appropri- ate Fuel Conversion Kit listed on page 34.
In the U.S.; Gas connection should be made in accor- dance with current National Fuel Gas Code, ANSI Z223.1. Since some municipalities have additional local codes, be sure to consult you local authority.
In Canada; consult the local authority and
Always check for gas leaks with a mild soap and water solution. Do not use an open flame for leak testing.
Light the pilot according to the directions on page 26, before going to the next step.
CAUTION
This appliance should only be connected by a qualified gas techni- cian. Test to confirm manifold pressures as specified below.
The Jefferson Heater and its individual shutoff valve must be disconnected from the gas supply piping during any pressure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa).
The Jefferson Heater must be isolated from the gas supply piping system by closing its indi- vidual manual shutoff valve during any pressure testing of the gas supply piping system at test pressure equal to or less than 1/2 psig.
There must be a gas shutoff between the stove and the supply.
In order to connect Natural Gas, use a fitting with 3/8” NPT nipple on the valve side and 1/2” natural gas supply line with an input of 28,000 BTUs at a manifold pressure of 3.5” and minimum inlet supply for adjustment of 5.5” w.c.
In order to connect Propane, use a fitting with 3/ 8” NPT nipple on the valve side and 1/2” propane gas supply line with an input of 28,000 BTUs at a manifold pressure of 10.0” and minimum inlet supply for adjustment of 11.0” w.c.
Burner Information
The appliance must only use the gas specified on the rating plate, unless converted using a Vermont Cast- ings Fuel Conversion Kit. To convert from LP to Natural Gas use Kit
Conversion instructions are provided with each kit and beginning on Page 28 in this manual.
THIS APPLIANCE SHOULD BE CONNECTED TO THE GAS SUPPLY ONLY BY A QUALIFIED GAS SERVICE TECHNICIAN. FOLLOW ALL LOCAL CODES.
THERE MUST BE A GAS
In order to connect Natural Gas, use a fitting with 3/8Ó NPT nipple on the valve side and 1/2Ó natural gas supply line with an input of 28,000 BTUs at a manifold pressure of 3.5Ó and minimum inlet supply for adjust- ment of 5.5Ó w.c.
In order to connect Propane, use a fitting with 3/8Ó NPT nipple on the valve side and 1/2Ó propane gas supply line with an input of 28,000 BTUs at a manifold pressure of 10.0Ó and minimum inlet supply for adjust- ment of 11.0Ó w.c.
Air Shutter Adjustment
The Jefferson is shipped from the factory with the air shutter adjusted to the minimum allowed opening. Refer to Table 1. Based on the altitude where the stove is located, a shutter adjustment is acceptable to provide a mixed balance of flame color/glow. To adjust the shutter opening, follow the steps below.
NOTE: The air shutter may only be adjusted to a more open position. The factory setting is the minimum allowable air shutter opening.
Table 1. Air Shutter Adjustment Minimum rear injector air inlet openings.
Model | Natural Gas | LP |
Direct Vent | ¹⁄₂Ó | ¹⁄₂Ó |
Natural Vent | ¹⁄₂Ó | 1Ó |
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Air Shutter Adjustment Instructions
To adjust the air shutter, the following procedures should be followed:
1.Remove stove front. Lift stove front up and then swing bottom out and away to disengage from the stove body. (Fig. 37)
2.Swing open the swiveling latches at the top left and right corners of the glass frame. (Fig. 12, Page 13)
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