Lenoxx Optima 3 FS Manuale Utente

PAGE 8 

The model Optima

 

3 INS is approved for installation into a solid 

fuel burning fireplace, either a masonry fireplace (built to UBC 37 

or ULC S628 standards) or an approved factory-built / zero 

clearance fireplace (built to UL 127 or ULC S610 standards). 

See pages 20 and 21 for additional information on venting.  

 

Height 

20 1/8” / 512 mm 

Width @ Front 

32”        / 814 mm  

(extends back 1 ½”) 

Width @  back 

24 5/8” / 626mm 

Depth 

17 ¾”   / 452 mm 

CAUTION:  The fireplace in which the Optima 3 INS is to be 

installed must be thoroughly cleaned if it has been used to burn 

wood or synthetic logs. Have the chimney and all inside sur-

faces of the fireplace brushed and vacuumed so that no soot, 

embers, or loose combustion deposits can be drawn into the 

heat circulation blower and blown into the living area. If any por-

tion of the chimney system shows signs of structural or me-

chanical weaknesses, such as: cracks, leaky joints, corroded or 

warped surfaces, the faulty portion must be repaired or replaced 

prior to installing this appliance. 

IMPORTANT:  When installing the Optima 3 INS into a factory 

built fireplace or heatform, the air flow within and around the fire-

place shall not be altered by the installation of the insert (i.e. DO 

NOT BLOCK louvers or cooling air inlet or outlet ports, circulating 

air chambers in a steel fireplace liner or metal heat circulator). The 

factory built firebox must accept the insert without modification 

other than removing bolted or screwed together pieces such as 

smoke shelf / deflectors, ash lips, screen or door tracks and 

damper assemblies. Any fireplace component, which is removed, 

must be retained so they can be reinstalled to restore the fireplace 

to its original operating condition. The removal of any part must 

not alter the integrity of the outer shell of the pre-engineered fire-

place cabinet in any way. A Warning Label (provided with appli-

ance) must be installed in the fireplace firebox so that it shall be 

visible upon removal of the fireplace insert (see Fireplace Warning 

Label, below). Use RTV high Temperature Silicone as an adhe-

sive to affix the warning label. 

THIS FIREPLACE HAS BEEN ALTERED TO ACCOMMO-

DATE A FIREPLACE INSERT AND SHOULD BE IN-
SPECTED BY A QUALIFIED PERSON PRIOR TO RE-
USE AS A CONVENTIONAL FIREPLACE. 

HEARTH / FLOOR PROTECTION - Optima 3 INS 
The area directly in front of the Optima 3 INS 
must be protected by a noncombustible material 
or a fireplace hearth or hearth extension as fol-
lows:  
Combustible flooring must be protected by 
non-combustible material in Canada and 10 
millimeter (3 / 8 inches) millboard or equivalent 
non-combustible in U.S. extending beneath the 
heater and to the front as indicated or to the 
nearest permitted combustible material. See 
page 6 for requirements when using alternate 
material as hearth extension. 

 

The protected area must extend 6” to the front of 
the face of the Optima 3 INS. 

MINIMUM CLEARANCES TO COMBUSTIBLES 
   

 

inches / millimeters 

A - Insert to side wall  

6”   /  153 mm 

B - Insert to side trim  

1”   /  26 mm 

C - Hearth extension 

6”   /  153 mm 

D - Insert to mantel 

18”  /  458 mm 

E - Insert to top trim 

1”   /  26 mm 

 

 

 

Recommended clear-

ance zone from the

front of the appliance

to combustibles is 4

feet minimum.