Monessen Hearth VWF30 User Manual

7

Damper Stop

Damper

Injector 

(Natural Gas 

only)

Installation of this vented gas log set in the Commonwealth 
of Massachusetts requires the damper be permanently 
removed or welded in the fully open position. In addition, a 
naturally vented gas log may not be installed in a bedroom 
or bathroom in the Commonwealth of Masasachusetts. 

  •  Turn off gas supply to fireplace or firebox.
  •  Clean the fireplace floor and chimney before installing the log set. Seal any ash clean-out doors to protect the 

unit from down drafts. 

Screws 

A damper stop must be provided with the unit. The damper stop must be installed as shown in (Figure 3) to prevent full 
closure of the fireplace damper blade and provide a minimum flue opening, per table on page 5.
Should the clamp not fit, or provide the required permanent opening from the table, have the damper cut to provide a 
minimum permanent opening or install a permanent stop.

In compliance with ANSI Z21.60•CGA2.26 and National Fuel Gas Code, Section 6. 

  1.  Place grate/burner assembly into firebox 

with the front pan facing forward.

  2.  Drill two (2) 

5

/

32

" diameter holes approxi-

mately 1 

1

/

2

" deep.

  3.  Anchor the front pan to the floor using 

the screws provided.