Install Optional Outside Air Kit
The AKU3 Outside Air Kit can be installed to bring com- bustion air to the heated room air. The air that is drawn into the heated room air from outside the home or un- heated area helps relieve the pressure in the home. The duct termination should be located so it is exposed to an
The duct termination must be located so it does not compete for air flow with exhaust fans, gas vent hoods or other air consuming devices or appliances. It must not be obstructed by rafters, insulation materials or other obstructions. The less restrictive the air supply, the better the outside air kits will perform.
It is good practice to protect your hands and eyes during installation by wearing work gloves and safety glasses.
CAUTION: Do not install termination into a garage or other area that could contain flammable liquids or fumes, or into an attic space.
Installation Instructions
Determine the location of the fireplace as described in the fireplace installation manual. Then plan location of the duct termination and the route of the duct run between the fireplace and the duct termination.
Duct run must be limited to a maximum distance of 40’ (12.2m) from the fireplace pipe collar to duct termina- tion. This will provide the least restriction to air flow. No more than four (4) 90° elbows can be used. Duct run may be horizontal, vertical, inclined or any combina- tion of these. (Fig. 12) You are now ready to install the Outside Air Kit.
1.Remove the screws retaining the outside air cover- plate, if provided. (Located on the left side of front open units, on backside of multisided units.) Discard coverplate. (Fig. 13)
2.Secure the inlet collar assembly to the outer casing with four screws (not provided). (Fig. 14)
3.Slide the duct over the collar and attach the duct to the collar using the plastic tie straps or three (3) screws (screws not provided). Continue attaching the ducting together using three (3) screws at each joint until you have installed sufficient duct to arrive at your duct termination locations.
4.At the termination end, install the duct termination. This should be installed from the outside of the home. Cut a hole in the desired location approxi- mately 4¹⁄₂” (114mm) in diameter, caulk around the hole, and slide the termination through the opening from outside the home. The termination/rain cap
UVDR Series Unvented Gas Fireplaces
should be caulked around its perimeter to assure a tight seal. The rain cap opening should be positioned downward. (Fig. 15)
The Outside Air Kit is now installed and ready for use.
Soffit Termination
| Attic | |
Duct | Ceiling | |
Termination | ||
|
40’ Max.
Duct Run
Duct
Exterior Wall Termination
Exterior Wall
40’ Max. Duct Run
Rain Cap
Duct Termination | Duct |
|
FP1060
Fig. 12 Typical outside air installations.
Cover Plate
KT143
Fig. 13 Remove outside air cover plate and discard, retain screws.
20007469 | 9 |
