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Gas Pressure - All Models
Tables 2 and 3 show the appliances' gas
pressure requirements:
Inlet Gas Supply Pressure
(all models)
Fuel #
Minimum
5.0" WC
Natural Gas
(1.24 kPa)
11.0" WC
Propane
(2.74 kPa)
Table 2
Manifold Gas Supply Pressure
(all models)
Fuel #
Low
Natural
(Lo) 2.2" WC
Gas
(.55 kPa)
(Lo) 6.3" WC
Propane
(1.57 kPa)
Table 3
Test gauge connections are provided on the front
of the millivolt gas control valve, identified IN for
the inlet and OUT for the manifold side.
Propane tanks are at pressures that will cause
damage to valve components. Verify that the
tanks have step down regulators to reduce the
pressure to safe levels.
These appliances must be isolated from the
gas supply piping system (by closing their
individual manual shut-off valve) during any
pressure testing of the gas supply piping
system at test pressures equal to or less
than 1/2 psig (3.5 kPa).
These appliances and their individual shut-off
valves must be disconnected from the gas
supply piping system during any pressure
testing of that system at pressures greater
than 1/2 psig (3.5 kPa).
4
Orifice Sizes - Sea Level to High Altitude
(All Models)
These appliances are tested and approved for
installation at elevations of 0-4500 feet (0-1372
meters) above sea level using the standard
burner orifice sizes (marked with an "*" in Table
4). For elevations above 4500 feet, contact your
Maximum
gas supplier or qualified service technician.
10.5" WC
Deration - At higher elevations, the amount
(2.61 kPa)
of BTU fuel value delivered must be reduced
by either:
13.0" WC
• Using gas that has been derated by the gas
(3.23 kPa)
company.
• Changing the burner orifice to a smaller size
as regulated by the local authorities having
jurisdiction and by the (USA) National Fuel
Gas Code NFPA 54/ANSI Z223.1 - latest
edition or, in Canada, the CAN/CSA-B149.1
High
codes - latest edition.
(Hi) 3.5" WC
Install the appliance according to the regulations
(.87 kPa)
of the local authorities having jurisdiction and,
in the USA, the National Fuel Gas Code NFPA
(Hi) 10.0" WC
54 / ANSI Z223.1 - latest edition or, in Canada,
(2.49 kPa)
the CAN/CSA-B149.1 - latest edition.
NOTE: Flame appearance will diminish 4% per
thousand feet.
NOTE: Each model has two burners and 2
Orifices.
Elevation 0-4500 feet ( 0-1372 meters)
Model
Series
SDVST
SDVPF
Table 4
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Burner Orifice Sizes
Nat.Gas
Propane
drill size (inches)
drill size (inches)
#44 (.086")
*
#55 (.052")
**
60J80 •
19L52 •
* Standard size installed at factory
** Standard size in LP conversion kit
• Part /Cat. Number
Gas Valve Diagrams - See Figure 1.
HI/LO Variable
Inlet Pressure Tap
Flame Height
Adjustment
Manifold Pressure Tap
OUT
Main Gas Control Knob
Pilot Adjustment
OFF/PILOT/ON
Screw
Figure 1 -
SIT Millivolt Gas Valve
REQUIREMENTS FOR THE COMMON-
WEALTH OF MASSACHUSETTS
These fireplaces are approved for installation in
the US state of Massachusetts if the following
additional requirements are met:
• Install this appliance in accordance with
Massachusetts Rules and Regulations 248
C.M.R.
• Installation and repair must be done by a
plumber or gas fitter licensed in the Com-
monwealth of Massachusetts.
• The flexible gas line connector used shall
not exceed 36 inches (92 centimeters) in
length.
• The individual manual shut-off must be a
T-handle type valve.
Massachusetts Horizontal Vent Requirements
In the Commonwealth of Massachusetts, hori-
zontal terminations installed less than seven
(7) feet above the finished grade must comply
with the following additional requirements:
• A hard wired carbon monoxide detector
with an alarm and battery back-up must be
installed on the floor level where the gas
fireplace is installed. The carbon monoxide
detector must comply with NFPA 720, be
ANSI/UL 2034 listed and be ISA certified.
• A metal or plastic identification plate must
be permanently mounted to the exterior of
the building at a minimum height of eight (8)
feet above grade and be directly in line with
the horizontal termination. The sign must
read, in print size no less than one-half (1/2)
inch in size, GAS VENT DIRECTLY BELOW.
KEEP CLEAR OF ALL OBSTRUCTIONS.
NEW YORK CITY, NEW YORK (MEA)
Installation of these fireplaces are approved
for installation in New York City in the US state
of New York.
IN
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