Monessen Hearth B-Vent Specialty Gas Fireplace System DESIGNER SERIES - Manual (Page 9)

To accommodate the various configurations, we have provided access openings in the bottom of the
unit for gas line and wall switch wires. This may not be convenient for some installations, if so you may
drill an access opening into the lower face of the unit (1" for gas line, 1/2" for the grommet).
1. Route the 3/8 inch N.P.T. black iron gas line or equivalent to the fireplace. Include a manual shut-off
valve and union in the line so the control may be disconnected for servicing. A drip leg is also
recommended in the gas supply line.
2. Install a rigid black pipe or if local codes permit a 3/8 inch flex connector and shutoff valve to the gas
line and the fireplace gas valve. Seal and tighten securely. An adapter fitting is required between the
gas valve and flex connector if used. Do not kink flex connector (Figure 3).
3. Check for gas leaks with a soap and water solution. D
O NOT USE AN OPEN FLAME
.
N
OTE
: P
URGE ALL GAS LINES WITH THE GLASS DOOR OF THE FIREPLACE REMOVED
. A
SSURE THAT A CONTINUOUS GAS
FLOW IS AT THE BURNER BEFORE INSTALLING THE DOOR
.
F
IREPLACE
I
NSTALLATION
8
F
IGURE
4
2 1/4
8 1/2
12
9
COMBUSTIBLE MANTLE COMBUSTIBLE MANTLE
AND TRIM ALLOWED AND TRIM ALLOWED
ABOVE DOTTED LINE ABOVE DOTTED LINE
FRONT OF FRONT OF
FIREPLACE FIREPLACE
MEASURE FROM TOP MEASURE FROM TOP
OF OPENING OF OPENING
BLACK IRON PIPE
SHUT OFF VALVE
FLEXIBLE CONNECTOR
ADAPTER FITTING
F
IGURE
3
53D9019.
Rev 3 11/07