Constructing The Appliance Chase; Clearances - Heat & Glo ST-550TM-IPI Owner's Manual

B. Constructing the Appliance Chase
A chase is a vertical box-like structure built to enclose the
gas appliance and/or its vent system. In cooler climates
the vent should enclosed inside the chase.
NOTICE: Treatment of ceiling fi restops and wall shield
fi restops and construction of the chase may vary with the
type of building. These instructions are not substitutes
for the requirements of local building codes. Therefore,
you MUST check local building codes to determine the
requirements to these steps.
Chases should be constructed in the manner of all out-
side walls of the home to prevent cold air drafting prob-
lems. The chase should not break the outside building
envelope in any manner.
Walls, ceiling, base plate and cantilever fl oor of the chase
should be insulated. Vapor and air infi ltration barriers
should be installed in the chase as per regional codes for
the rest of the home. Additionally, in regions where cold
air infi ltration may be an issue, the inside surfaces may be
sheetrocked and taped for maximum air tightness.
To further prevent drafts, the wall shield and ceiling fi re-
A
HEADER
C
D*
ST-550TM-IPI
Opening
Inches
Millimeters
* Adjust framing dimensions for interior sheathing (such as sheetrock)
** NOTICE: Appliance must be raised a minimum of 1/2 inch when using the Modern Front.
Figure 5.2 Clearances to Combustibles ST-550TM-IPI
Note: The header must
A
be installed on end as
shown in this diagram.
E
B
MINIMUM FRAMING DIMENSIONS
A B C
Rough Rough Rough Rough
Opening Opening Opening
(Width) (Height) (Depth) (Width)
8-5/8 41-1/2 15 38-1/8
219 1054 381
Heat & Glo • ST-550TM-IPI • 2142-900 Rev. P • 12/15
stops should be caulked with caulk with a minimum of 300ºF
continuous exposure rating to seal gaps. Gas line holes and
other openings should be caulked with caulk with a minimum
of 300ºF continuous exposure rating or stuffed with unfaced
insulation. If the appliance is being installed on a cement sur-
face, a layer of plywood may be placed underneath to pre-
vent conducting cold up into the room.
C. Clearances
NOTICE: Install appliance on hard metal or wood surfaces
extending full width and depth. DO NOT install directly
on carpeting, vinyl, tile or any combustible material other
than wood.
WARNING! Risk of Fire! Maintain specifi ed air space
clearances to appliance and vent pipe:
• Insulation and other materials must be secured to prevent
accidental contact.
• The chase must be properly blocked to prevent blown
insulation or other combustibles from entering and
making contact with fi replace or chimney.
• Failure to maintain airspace may cause overheating and
a fi re.
D* E F
Clearance Clearance
to Top to Ceiling
55 32
969 1398 813
F
J
G
H
G** H
Bottom Door
Combustible
Clearance
Flooring Appliance
(Modern Front)
1/2 0
13 0
I
I J
Ends of Sides of
Appliance
1/2 36
13 914
19