Monessen Hearth 624DV(ST - Manual (Page 21)

42D0200
Designer Series Gas Fireplaces
21
vENTING INSTaLLaTIoN
BELow GRadE INSTaLLaTIoNS
When it is not possible to meet the required vent terminal clearances of 12" above grade level,
a snorkel kit is recommended. It allows installation depth down to 7" (178 mm) below grade
level. The 7" (178 mm) is measured from the center of the horizontal vent pipe as it penetrates
through the wall.
Ensure that sidewall venting clearances are observed. If venting system is installed
below ground, we recommend a window well with adequate and proper drainage to be
installed around the termination area.
If installing a snorkel, a minimum 24" vertical rise is necessary. The maximum horizontal run
with the 24” vertical pipe is 36". This measurement is taken from the collar of the fireplace (or
transition elbow) to the face of the exterior wall. Refer to the Sidewall Venting Graph for extended
horizontal run if the vertical exceeds 24".
1. Establish vent hole through the wall. Refer to Page 18, Figure 17
2. Remove soil to a depth of approximately 16" below base of snorkel. Install drain pipe. Install
window well (not supplied). Refill hole with 12" of coarse gravel leaving a clearance of approxi-
mately 4" below snorkel. Figure 28
3. Install vent system.
4. Ensure a watertight seal is made around the vent pipe
coming through the wall.
5. Slide the snorkel into the vent pipes and secure to the
wall.
6. Level the soil so as to maintain a 4" clearance below snor-
kel. Figure 28
If the foundation is recessed, use recess brackets (not supplied) for securing lower portion of
the snorkel. Fasten brackets to wall first, then secure to snorkel with self drilling #8 x 1/2" sheet
metal screws. It will be necessary to extend vent pipes out as far as the protruding wall face.
Figure 28
w
a
RNING
• do not back fill around snorkel.
• a clearance of at least 4” must be
maintained between the snorkel and the
soil.
FP1965
below grade install
Figure 28 -
Below Grade Installation
Screws
Minimum
4" Clearance
Ground
Window Well
Gravel
Drain
Foundation Wall
Firestop
24"
Minimum
FP1965
FP1966
snorkel
Figure 29 -
Snorkel Installation, Recessed Foundation
Foundation
Recess
Watertight Seal
Around Pipe Sheet Metal
Screws
Wall Screws
Snorkel
FP1966