Heatilator WTB33 User manual

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Heatilator • WTB Refractory • 4055-186 Rev. D • 8/15
Models:
WTB30, WTB33, WTB36, WTB42
Installation
Instructions
These refractories are intended for use with the Novus
NDV and NBV Series gas appliances. Check with your
local building code agency before you begin installation
to ensure compliance with local codes, including the need
for permits and follow-up inspections. If you encounter
any problems regarding code approvals, or if you need
clarification of any of the instructions contained here, con-
tact your Hearth & Home Technologies dealer. For the
dealer nearest you, please visit www.heatilator.com
Figure 1. WTB Refractory
CAUTION! Risk of Cuts and Abrasions. Wear protec-
tive gloves and safety glasses during installation. Sheet
metal edges are sharp.
WARNING! Risk of Burns! The fireplace shall be turned
off and cooled before installation of the refractory. Hot
surfaces may cause burns.
1. Shut off the electricity to the appliance and turn the
gas shutoff valve to the closed position. See Figure 2.
Remove the screen and glass from the appliance.
Figure 2. Gas Shutoff Valve
2. If installing this refractory into a B-Vent Appliance,
please go to “To Convert Refractory Kit to Fit B-Vent
Appliance” on page 3 of this manual.
3. Attach the two long hook-shaped brackets by removing
the two outside screws on the false back and reinstall
the screws. See Figures 3 and 4. Make sure to shorten
the bracket if installing in a B-vent unit. See Figure 5.
Figure 3. Location of Hook-Shaped Brackets
Figure 4. Loosen Brackets
FLUE VISOR MAY NEED TO BE REMOVED
FLUE VISOR MAY NEED TO BE REMOVED
REFRACTORY APPEARANCE
MAY VARY BY MODEL.

Heatilator • WTB Refractory • 4055-186 Rev. D • 8/15
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Figure 5. Shorten Brackets for B-Vent Installation
4. Set the back refractory piece into the brackets. See
Figures 6 and 7.
Figure 6. Position Back Refractory for Placement
Figure 7. Set Back Refractory in Place
5. If lava rock has been placed in appliance, clean the
rock away from the firebox sides to make room for the
side refractory. See Figure 8.
Figure 8. Move Lava Rock to Install Side Refractory
6. Carefully install a side refractory. See Figures 9 and
10.
7. To secure the side refractory in place, remove either
the middle or back screw in the firebox top. Attach a
refractory bracket (using the screw removed) to the
firebox top. See Figure 10.
Figure 9. Position Side Refractory
Figure 10. Set Side Refractory in Place

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Heatilator • WTB Refractory • 4055-186 Rev. D • 8/15
8. Adjust the back and sides so no gaps are visible in the
corners where the pieces come together.
9. Repeat Step 7 to install the other side. See Figure 12.
Figure 11. Attach Refractory Bracket
10. Reinstall the fixed glass assembly and screen.
11. Restore power and gas flow.
Figure 12. Install Other Side Refractory
Convert Refractory Kit to Fit B-Vent Appliance (Optional)
The back refractory piece will need to be cut for grout line con-
sistency between the back and the sides.
Note: Use a straight edge to cut back refractory as shown in
Figure 13.
Figure 13.