Duct Boost Kit

P/N 28098

Typical Duct Boost Application

Duct boosting involves adding an auxiliary fan (RB110) inline to a duct system to increase airflow and efficiency of the system in installations having duct runs longer than specified by the manufacturers of the primary heating, cooling or circulating device. These long duct runs result in poor circulation and additional wear and tear on the primary device.

The auxiliary fan is controlled either by a timer, a manual switch, a current sensing switch, or by an automatic pressure sensing switch as shown in the drawing inset.

Page 1 of 4 IN019 Rev. E

Duct Boost Kit

Installation Instructions

IN019 Rev E

1.0 Auxiliary Fan Location

The auxiliary fan should be mounted with a minimum of 15 feet of ductwork from the outlet of the primary device to the inlet of the fan.

2.0 Auxiliary Fan Mounting

2.1) Attach the bracket to mounting structure with the 1” screws (2) provided. Insert the grommets (3) supplied into the slotted holes in the mounting bracket and attach the fan to the mounting bracket with (3) self-tapping screws, provided, avoid over tightening screws.

2.2) Connect the ductwork between the outlet of the device and the inlet of the fan. Connect the outlet of the fan to the termination ductwork. Seal the connections with duct tape or similar means.

3.0 Automatic Pressure Switch Installation

The pressure switch must be mounted vertically on a wall surface as near the outlet of the primary device as possible. Mount the duct probe through the duct and connect with tubing provided to the pressure switch.

Insure the arrow on the duct probe points toward the primary device and away from the auxiliary fan to correctly sense static pressure rather than total pressure.

4.0 Electrical Wiring

All wiring must be performed in accordance with the National Fire Protection Association’s (NFPA)”National Electrical Code,

Standard #70”-current edition for all commercial and industrial work, and state and local building codes. All wiring must be performed by a qualified and licensed electrician. Make electrical connections to the pressure switch and auxiliary fan as shown in the following schematic:

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5.0 Installation Troubleshooting

If the auxiliary fan fails to start when the device cycle begins check the following:

Verify the AC voltage at the pressure switch . The pressure switch-point is approximately 0.1” WC. The device must generate this positive pressure to close the switch and start the auxiliary fan. If not, check the probe and connecting tubing for blockage.

You may blow gently into the tubing to check the switch operation.

If the auxiliary fan cycles on and off after the device cycle begins check the following:

The auxiliary fan may be generating sufficient negative pressure to overcome the positive pressure generated by the device.

This can be verified with a sensitive pressure measuring device or with an AC voltmeter at the pressure switch. Relocate the auxiliary fan further away from the device and recheck.

6.0 Maintenance

Periodic inspection, cleaning and/or replacement of system filters should be performed every (6) months or as required based upon device usage.

Disconnect electrical power to the unit prior to inspection or cleaning.

NOTE: Excessive noise or vibration from the auxiliary fan may be an indication of dirt buildup inside the fan impeller.

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IMPORTANT INSTRUCTIONS TO INSTALLER

Inspect the Duct Boost Kit for shipping damage within 15 days of receipt. Notify Spruce of any damages immediately. Spruce is not responsible for damages incurred during shipping. However, for your benefit, Spruce does insure shipments.

Install the Fan and Duct Boost Kit in accordance with all state and local building codes and state regulations.

WARRANTY

Subject to any applicable consumer protection legislation, Spruce Environmental Technologies, Inc. (“Spruce”) warrants that the Duct Boost Kit (the “Kit”) will be free from defects in materials and workmanship for a period of one (1) year from the date of manufacture (the “Warranty Term”).

Warranty claims made during the first thirty days after installation:

Spruce will replace any Kit which fails due to defects in materials or workmanship. The Kit may be returned (at owner’s cost) to either the point of purchase or the Spruce factory. The point of purchase may require proof of purchase or a bill of sales for replacement.

Warranty claims made after the first thirty days after installation through the end of the Warranty Term:

Spruce will (at its option) either recondition or replace any Kit which fails due to defects in materials or workmanship. The Kit must be returned (at owner’s cost) to the Spruce factory.

This Warranty is contingent on installation of the Kit in accordance with the instructions provided. This Warranty does not apply where any repairs or alterations have been made or attempted by others, or if the unit has been abused or misused.

Warranty does not include damage in shipment unless the damage is due to the negligence of Spruce.

Spruce is not responsible for installation, removal or delivery costs associated with this Warranty.

EXCEPT AS STATED ABOVE, THE KITS ARE PROVIDED WITHOUT WARRANTY OF ANY KIND,

EITHER EXPRESS OR IMPLIED, INCLUDING, WITHOUT LIMITATION, IMPLIED WARRANTIES OF

MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

IN NO EVENT SHALL SPRUCE BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR

CONSEQUENTIAL DAMAGES ARISING OUT OF, OR RELATING TO, THE KIT OR THE PERFORMANCE

THEREOF. SPRUCE’S AGGREGATE LIABILITY HEREUNDER SHALL NOT IN ANY EVENT EXCEED

THE AMOUNT OF THE PURCHASE PRICE OF SAID PRODUCT. THE SOLE AND EXCLUSIVE REMEDY

UNDER THIS WARRANTY SHALL BE THE REPAIR OR REPLACEMENT OF THE PRODUCT, TO THE

EXTENT THE SAME DOES NOT MEET WITH SPRUCE’S WARRANTY AS PROVIDED ABOVE.

For service under this Warranty, contact Spruce for a Return Material Authorization (RMA) number and shipping information. No returns can be accepted without an RMA. If factory return is required, the customer assumes all shipping cost to and from factory.

Spruce Environmental Technologies, Inc.

3 Saber Way

Ward Hill, MA 01835

TEL. (978) 521-0901

FAX (978) 521-3964

Record the following information for your records:

Serial No.

Purchase Date

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