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HOT AIR DUCTING INSTALLATION
The WCT4820WS fireplace is approved for use
with a Gravity Kit.
Gravity Kit
The gravity kit is designed for double hot air
outlets and includes: (See Figures 14 and 15)
- 2 telescopic lengths 8" I.D.
- 2 90º elbows 8" I.D.
- 2 hot air outlet kits (grill and frames)
- 2 adaptors
See Gravity Kit Accessories on Page 22.
The only blower that can be used with the gravity
kit is the UZY5.
The gravity kit allows you to block the upper
louver of the fireplace. To do so, follow the
steps below:
a) Remove the upper louver from the fire-
place.
b) Install the black panel (BWCF) making sure
that the insulation strip is installed inside.
c) The fireplace facade can be covered with
non-combustible material (Figure 16).
Frame
Grill
WARNING: Both pipes of
the double hot air outlet
must be installed. Any oth-
er installation may cause
fire and void warranty.
Figure 14
For safe installation, the gravity kit must meet
the following requirements:
Minimum height*
68" (1,727 mm)
Maximum length
See Figures 14 and 15
* The height of the louver must be measured
from the base of the WCT4820WS fireplace to
the middle point of the louver.
To extend the double outlet system forward
of the WCT4820WS fireplace (not flush), it
will be necessary to purchase two adjustable
lengths (H8951).
When installing the double outlet system, the
hot air outlets can be installed in the same room
as the fireplace, or one or both of the outlets
can be installed in adjacent or upper rooms.
Installing the ducts at different elevations will
tend to exhaust more heat out of the higher
outlet (Figure 15).
12
WARNING: The outlet grills
should not be installed fac-
ing upward through a floor.
Danger of burns can result
if grills in floor are stepped
on.
13" x 13"
Outlet Grill
(330mm x 330mm)
10' (3.1m)
Max.
Maintain at least 6-1/2"
(160 mm) clearance from
the outlet grill framing to
a combustible ceiling,
side wall or mantel.
Figure 15
Collar
Flashing
u
Figure 16
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Outlet Grill
Rain Cap
Roof Support
Attic Radiation
Shield
Radiation Shield (Firestop)
68" Min.
(1727mm)
45" Min.
(1143mm)
Non-Combustible
Facing
u
Combustibles are not allowed below top
spacers above the fireplace. Facing in front
of fireplace must be non-combustible below
this area.
10'
(3.1m)
Max.
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