8
* Other approved chimney brand is Simpson Dura-Vent DV-GS.
PRE-INSTALLATION
RATINGS
VISN-35 / SDVSS-35 VISN-25 / SDVSS-25
NATURAL GAS LP GAS NATURAL GAS LP GAS
Max/Min Input BTUh 0-2,000 Feet
(0-610 M)u
35,000/23,000 35,000/23,500 25,000/17,500 25,000/18,000
Manifold Pressure (IN. WC)
3.5 10.0 3.5 10.0
Min. Inlet Pressure (IN. WC)
5.0 11 5.0 11
Maximum heat output BTUs/hour-steady state 29,050 29,050 20,750 20,750
P4 Efficiency
w
61.65% 65.74% 65.08% 66.56%
Steady-State Efficiency v
82-85% 82-85% 82-85% 82-85%
O
rifice (DMS) 0-2,000 Feet (0-610 M)u
#34 (.111 IN). #50 (.070 IN). #42 (.093 IN). #53 (.059 IN).
uUnit factory equipped for 0-2000 FT/0-610 M, In Canada 0-4500 FT/0-1370 M
vThe Steady State Efficiency numbers based on maximum vent configuration.
wTested to CSA P.4.1-02 “Testing Method for Measuring Annual Fireplace Efficiency.
Electrical Rating: 120 VAC, 60 HZ, Less Than 2 Amps
FEATURES
Installation Options
Residential
Vented vertical and horizontal
Manufactured (mobile) home
Natural gas (NG) or propane (LP)
Bedrooms
Optional wall-mounted or remote thermostat
Venting
This appliance can be vented with Secure Vent™ direct-vent pipe by Security
Chimneys™*. Coaxial pipe diameters are 6-5/8” outer and 4” inner. The
combustion air for this stove is drawn from outside the house through
the outer DV (direct-vent) pipe. Room air is not required for combustion.
When planning your installation, select the correct length of vent pipe
for your particular requirements. Determine the minimum clearance to
combustibles from the rear of the unit to the wall. It is also important
to note the thickness of the wall. Before cutting the vent hole through
the wall make sure that ALL vent and termination clearances (see Page
17) will be met.
Electrical
The standard fan motor requires 120 Volts AC for operation. The stove is
not dependent on the fan or an outside electrical supply to operate.
WARNING - Electrical Grounding Instructions - This appliance
is equipped with a three-prong (grounding) plug for your pro-
tection against shock hazard and should be plugged directly
into a properly grounded three-prong receptacle. Do not cut or
remove the grounding prong from this plug.
Millivolt Valve
This appliance is operated with a millivolt valve and therefore burns even
during a power outage.
Fuel
This appliance comes from the factory equipped to burn natural gas at
a specified elevation. The appliance can be converted to burn LP gas
(liquid propane) by changing the cassette (valve and pilot assembly) or
installing a conversion kit. Only Lennox Hearth Products conversion kits
can be used to convert from NG to LP or LP to NG. Contact your Lennox
Hearth Products dealer for details.
Specifications
Pipe:Type - direct-vent
Recommended manufacturer*
Security™ Secure Vent*
Diameter - 6-5/8” x 4” for all installations
Stove Packaging List
The gas stove comes with the following parts:
1 Stove Body with Burner Cassette
1 150 CFM Blower
1 Brick Panel
1 Log Set
1 Bag of Ember Material
1 Installation and Operation Manual
Options
• Wall-mounted or Remote Thermostat
• Painted, Gold, or Nickel Plated Door Trim and Grill Assembly (re-
quired)