Product Manual

ManualsBrandsTjernlund ManualsBlowers + FansDuct Booster Increases Heating and Cooling Power — 275 CFM

MAINTENANCE

If installed on a forced warm air or cooling system where filters are properly installed and

maintained no cleaning of the DUCT BOOSTER® blower wheel should be required.

If installed on a gravity warm air heating system which does not include filters, the DUCT

BOOSTER® should be removed from the duct and cleaned at the start of each heating

season. The motor is permanently lubricated so no oiling is necessary. The DUCT

BOOSTER® motor normally runs hot to the touch.

LIMITED PARTS WARRANTY

Tjernlund Products, Inc. warrants the components of its products for one year from date

of installation. This warranty covers defects in material and workmanship. This warranty

does not cover normal maintenance, transportation or installation charges for replace-

ment parts or any other service calls or repairs. Products that are tampered with, dam-

aged, installed improperly, wired incorrectly or defective due to malfunctioning appliances

are not covered under this warranty. This warranty DOES NOT cover the complete

DUCT BOOSTER® if it is operable, except for the defective part.

DB-2 REPLACEMENT PARTS LIST

MOTOR KIT 950-7025

WHEEL KIT 950-7010

HOUSING KIT 950-7000

TJERNLUND PRODUCTS, INC.

1601 Ninth Street • White Bear Lake, MN 55110-6794

PHONE (800) 255-4208 • (651) 426-2993 • FAX (651) 426-9547

Visit our web site • www.tjernlund.com

TJERNLUND LIMITED ONE YEAR WARRANTY

Tjernlund Products, Inc. warrants to the original purchaser of this product that the product will be free from defects due

to faulty material or workmanship for a period of (1) year from the date of original purchase or delivery to the original

purchaser, whichever is earlier. Remedies under this warranty are limited to repairing or replacing, at our option, any

product which shall, within the above stated warranty period, be returned to Tjernlund Products, Inc. at the address list-

ed below, postage prepaid. THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION ON THE

FACE HEREOF, AND TJERNLUND PRODUCTS, INC. EXPRESSLY DISCLAIMS LIABILITY FOR INCIDENTAL OR

CONSEQUENTIAL DAMAGES ARISING FROM THE USE OF THIS PRODUCT. THIS WARRANTY IS IN LIEU OF ALL

OTHER EXPRESS WARRANTIES AND NO AGENT IS AUTHORIZED TO ASSUME FOR US ANY LIABILITY ADDI-

TIONAL TO THOSE SET FORTH IN THIS LIMITED WARRANTY. IMPLIED WARRANTIES ARE LIMITED TO THE

STATED DURATION OF THIS LIMITED WARRANTY. Some states do not allow limitation on how long an implied war-

ranty lasts, so that limitation may not apply to you. In addition, some states do not allow the exclusion or limitation of

incidental or consequential damages, so that above limitation or exclusion may not apply to you. This warranty gives

you specific legal rights and you may also have other rights which may vary from State to State. Send all inquiries

regarding warranty work to Tjernlund Products, Inc. 1601 9th Street, White Bear Lake, MN 55110-6794. Phone (651)

426-2993 • (800) 255-4208 • Fax (651) 426-9547 or email us at fanmail@tjfans.com.

DUCT BOOSTER

MODEL DB-2

DESCRIPTION

The DB-2 DUCT BOOSTER® is designed to increase the flow of heated air in warm air

heating systems, or cooled air in central air conditioning systems.

Its size and design limits its use to branch ducts serving individual rooms, not the main

supply or “truck line” duct. The DUCT BOOSTER® can be mounted on round or flat

ducts. It is frequently installed on a warm air duct of a gravity warm air furnace to

provide heating for a basement area.

SPECIFICATIONS

Motor: 120/1/60, 1550 RPM, 40 watts, .52 FLA

GENERAL INFORMATION

NOTE: Under normal operating conditions the motor casing of the DUCT BOOSTER®

will feel hot to the touch. The motor has been designed to run at this temperature and is

Recognized by Underwriters Laboratories (UL), This normal operating temperature will

not harm the motor provided the operation and maintenance instructions enclosed with

each unit are followed.

These units have been factory tested and rated in accordance with AMCA standard 210,

test code for air moving devices.

Each DB-2 is electrically factory line tested before shipment.

After opening carton, inspect thoroughly for hidden damage. Fan wheel should rotate

freely. If any damage is found, notify freight carrier and your distributor immediately and

file a concealed damage claim.

OWNERS INSTRUCTIONS

THESE INSTRUCTIONS MUST REMAIN WITH EQUIPMENT.

DO NOT DESTROY.

Summary of content (4 pages)

PAGE 1
DUCT BOOSTER® MODEL DB-2 MAINTENANCE If installed on a forced warm air or cooling system where filters are properly installed and maintained no cleaning of the DUCT BOOSTER® blower wheel should be required. If installed on a gravity warm air heating system which does not include filters, the DUCT BOOSTER® should be removed from the duct and cleaned at the start of each heating season. The motor is permanently lubricated so no oiling is necessary. The DUCT BOOSTER® motor normally runs hot to the touch.
PAGE 2
INSTALLATION (Tools Required) DRILL 5/16” DRILL BIT SCREW DRIVER 1/4” NUT RUNNER 1/4” WRENCH TIN SNIPS 1. Opening should be cut in the bottom or top of a horizontal duct or any side of a vertical duct. The motor shaft will then be in the horizontal position. Apply the mounting template provided to the duct, cut opening and drill four 5/16” holes noted on template.
PAGE 3
2. Attach speed clips to vent pipe and align with four holes drilled in step 1. 3. Insert DUCT BOOSTER® in the slot with the adjustable damper curved plate above blower wheel pointing in the direction of air flow. The front flange goes inside the duct and the side flanges go on the outside. Bend the flanges to conform to the duct. Secure DUCT BOOSTER® to duct utilizing speed clips and screws provided. Use wrench to tighten nut behind electrical box.
PAGE 4
OPERATION The DUCT BOOSTER® can be operated and controlled in several manners: 1. By means of a standard ON/OFF switch. 2. By wiring the DUCT BOOSTER® in parallel with a gas or oil fired central furnace blower motor. 3. By using the optional Tjernlund Products, Inc. Model PS1503 DUCT AIRSTAT pressure switch, sold separately. The DUCT AIRSTAT will automatically control the operation of the DUCT BOOSTER® in both heating and cooling systems.