Century Jefferson User Manual

Page 22

Jefferson Direct Vent/Natural Vent Gas Heater

30004177

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 ac-
cordance with current National Fuel Gas Code, ANSI
Z223.1/NFPA 54. Since some municipalities have
additional local codes, be sure to consult your local
authority.

In Canada; consult the local authority and CSA-B149.1

installation code.

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.

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 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 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” between minimum inlet
supply of 5.5” w.c. and maximum of 14.0” w.c.
In order to connect Propane, use a ﬁtting with 3/8”
NPT on the valve side and 1/2” propane gas sup-
ply line with an input of 28,000 BTUs at a manifold
pressure of 10.0” between a minimum inlet supply
of 11.0” w.c. and maximum of 14.0” w.c.

CAUTION

Burner Information

The appliance must only use the gas speciﬁed on the
rating plate, unless converted using a CFM Corporation
Fuel Conversion Kit. To convert from Natural Gas to LP
use Kit #30004180.
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 QUALI-

FIED GAS SERVICE TECHNICIAN. FOLLOW

ALL LOCAL CODES.
THERE MUST BE A GAS SHUT-OFF BE-

TWEEN THE STOVE AND THE SUPPLY.

In order to connect Natural Gas, use a ﬁtting with 3/8”
NPT 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” between minimum inlet supply of 5.5” w.c. and
maximum of 14.0” w.c.
In order to connect Propane, use a ﬁtting with 3/8”
NPT 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” between a minimum inlet supply of 11.0” w.c. and
maximum of 14.0” 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
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 al-
lowable air shutter setting.
Table 1. Air Shutter Adjustment

Minimum rear injector air inlet openings

Model

Natural Gas

Direct Vent

1/2” (13 mm)

Natural Vent

1/2” (13 mm)

1” (25 mm)

Air Shutter Adjustment Instructions

To adjust the air shutter, follow these steps:

CAUTION: Allow unit to cool if it has been in
operation.

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. (Page 14, Fig. 12)