Quadra-Fire QFP 30 Operation & Maintenance Manual - Tin
Page 17
03/21/01 #250-6120
03/21/01 #250-6120
QFP 30 Direct Vent Gas Fireplace
VENTING INSTALLATION OPTIONS & GUIDELINES
There are four types of direct vent system installations
approved for use with the QFP 30. It is very important to
maintain a balance between the combustion air intake and
the flue gas exhaust venting system. The types of installation
are:
Horizontal Termination (Figure 1)
Vertical Termination (Figure 2)
Into a Class A Metal Chimney (Figure 3)*
Into a Masonry Chimney (Figure 4)*
*USA installations only
Note: Certain limitations as to vent and vertical termination
configuration apply, and must be strictly adhered to. Read
this manual carefully.
When planning your installation, it will be necessary
to select the proper length of vent pipe for your particular
requirements. The vent graph on page 18 will show the
relationship between vertical and horizontal side wall venting,
and will help you to determine the various vent lengths
permitted and to select the amount of vertical rise desired for
“vertical-to-horizontal” type installations. It is also important
to note the wall thickness.To determine the length of pipe
required for vertical installations, measure the distance from
the application flue outlet to the ceiling, the ceiling thickness,
the vertical rise in an attic or second story, and allow for
sufficient vent height above the roofline, (see 2-10-3 Rule
below.) For two-story applications, fire stops are required at
each floor level. If an offset is needed in the attic, additional
pipe and elbows will be required.
When installing this appliance into an existing masonry
chimney, it is important to carefully measure the length of flex
needed to reach from the appliance outlet to the termination
cap. If the flex length is too short, a flex coupler will be needed
to attach an additional length of flex liner to make up the
difference. If the flex length is too long, the liner could sag
below the appliance outlet, which could result in a potential
fire hazard.
A masonry chimney or a factory-built chimney must be
the required height above the roof and any other nearby
obstructions. The chimney must be at least three feet higher
than the highest point where it passes through the roof and
at least two feet higher than the highest part of the roof or
structure that is within ten feet of the chimney, measured
horizontally. See 2-10-3 diagram below. These are safety
requirements and are not meant to assure proper flue draft.
V
E
N
TIN
G
2' Min.
3' Min.
10' Min.
2-10-3 VERTICAL TERMINATION RULE
TERMINATION CAP REQUIREMENTS
For Horizontal Terminations Use Only DuraVent Part
#985, OR HTI Part #HHW2
For Vertical Terminations Use Only DuraVent Part
#991.
FIG. 1 HORIZONTAL TERMINATION
Highwind Termination
Cap, DV#991
Storm Collar
Firestop
Ceiling
Pipe Lengths
Appliance Collar
FIG. 2 VERTICAL TERMINATION
Pipe Length
Wall Thimble/
Firestop
Horizontal Termination
Cap Use ONLY DV
#985 Or Hearth
Technologies HHW2