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Vermont Castings Jefferson Vent Free 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.
This appliance should only be connected by a
qualified gas technician. 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 individual
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 mani-
fold pressure of 11.0” and minimum inlet supply for
adjustment of 11.0” W.C.
4
5
1
3
2
Gas connection should be made in accordance with
current National Fuel Gas Code, ANSI Z223.1. Since
some municipalities have additional local codes, be
sure to consult you local authority.
Connect the gas supply and test for leaks. Use a 50/50
solution of liquid soap and water to test for leaks at gas
fittings and joints.
NEVER test with an open flame.
Light the pilot according to the directions on page 14,
before going to the next step.
Install the Log Set
1. Remove the logs from their packaging, and inspect
each piece for damage. DO NOT INSTALL DAM-
AGED LOGS.
2. Install the rear log by centering it side to side on
the sheet metal shelf at the back of the firebox.
(Fig. 14)
3. Install the left and right middle logs by
engaging holes on their bottoms with pins on the
burner brackets. (Fig. 14)
4. Loosely sprinkle the lava rocks directly on top of the
burner between the decorative grate and the middle
logs. Do not place any ember material behind the
middle logs. (Fig. 15)
5. Engage the upper log with the right middle log as
shown in Figure 15. Swing the top end toward the
rear of the firebox and rest on notch on top of rear
log. (Note: This log will touch the back of the
firebox.) Engage the top log with the upper log
and the left middle log. (Fig. 15)
Decorative Grate
ST223
Fig. 14 Install back, left and right logs.
1
2
3
MOTOR
SNAPSTAT
ON/OFF
RHEOSTAT
WHT
WHT
BLK
BLK
BLK
GRN
BLK
ST236
Fig. 13 Fan wiring diagram.