Tjernlund Auto-Draft FSAD & VSAD Series Inducers 8504090 Rev 11/00 - Manual (Page 7)

6
INSTALLATION OF THE AUTO-DRAFT® VENTER
The Auto-Draft® Venter is designed to fit any type of nominal 8”, 10” or 12” diameter vent pipe. Vent pipe must be installed and sup-
ported according to manufacturer’s instructions and/or in accordance with NFPA 211, “Chimneys and Vents”. Factory insulated vent
pipe may reduce clearances to combustibles when penetrating a combustible roof or wall. Refer to vent pipe manufacturer’s instruc-
tions for details.
The Auto-Draft® Venter can only be mounted with motor shaft vertical or horizontal to guarantee
proper operation of Tilt Switch, which cuts out power to motor when Venter housing is opened.
VERTICAL INSTALLATION ON METAL VENT PIPE
Auto-Draft® motor side is heavy. Housing hinge pin should be removed for easier installa-
tion. Support Venter base when removing hinge pin. When removing motor side, use
extreme caution so internal parts such as the impeller are not damaged.
1. Insert the Inlet Collar through the Mounting Plate and slide the Inlet Collar with Mounting Plate
into vent pipe, (See Diagram C).
2. Secure the Inlet Collar to vent pipe with self tapping stainless steel screws, installer supplied.
Make sure screws are long enough to adequately secure Inlet Collar and Mounting Plate to
vent pipe. Make sure vent pipe is adequately installed and supported for weight of Auto-Draft®
if not using an RMK Series roof mounting kit.
3. Lay a bead of hi-temp silicone close to the outer edge of Auto-Draft® Venter base.
Do not block the (6) corner drain holes, (See Diagram D).
4. Align Mounting Plate studs with holes in Auto-Draft® Venter base and secure the Auto-Draft®
to the Mounting Plate with (6) provided nuts, ( See Diagram C).
DIAGRAM D
DO NOT BLOCK (6) DRAIN HOLES WHEN
TERMINATING AUTO-DRAFT® VERTICALLY.
DRAIN HOLES MAY BE CAULKED WHEN
TERMINATED HORIZONTALLY.
DIAGRAM C
INLET COLLAR
MOUNTING
PLATE
PIPE
Tjernlund’s optional ETL approved RMK-8,10,12 roof mounting kits are available when con-
necting the Auto-Draft® to metal vent pipe. The mount kits are adjustable in height, support
the weight of the Auto-Draft® Venter independent of the vent pipe connection and maintain
Venter clearance to combustibles.
DIAGRAM B UNITED STATES