Fantech DB10 User manual

Positive Pressure Sensor Fan Proving Switch and Fan
DB10 Kit Includes:
1 DB10 Pressure Switch with Integral Delay
1 3 Section of PT Tubing
1 Grommet for Tubing
4 Wire uts for Electrical Connection
1 Packet with Switch Mounting Hardware
DB10 PRESSURE SENSING SWITCH KIT
INSTALLATION INSTRUCTIONS
IMPORTANT NOTICE: READ and SAVE THESE INSTRUCTIONS for FUTURE REFERENCE
DB10 Dimensional Data
Pressure Sensor Switch Operation
Fantech’s DB10 is a positive pressure sensing switch which recognizes dryer operation and activates the booster fan from
an independent electrical circuit. This eliminates connections through the dryer circuit which may void the manufacturers’
warranty as well as manual systems which require the attention of the operator or costly current/temperature sensing
systems.
The electrical to the booster fan is connected in series through a normally open terminal on the switch. A pressure tap is
connected to a tip on the side of the switch. When the dryer begins operation, positive pressure in the duct causes the
switch diaphragm to expand closing the circuit to the booster fan. An integral delay-on-make timer in the switch will cycle
the fan on for intervals of 10 minutes. This will continue until the dryer has stopped and the timer delay period has lapsed.
Drying cycles, the booster fan, the delay timer and the pressure switch are not adversely affected by the starting/stopping
intervals.
Installation Guidelines
The DB10 switch can be mounted at any point in the duct between the dryer and booster fan. However, in installations
when the switch is used to control an RVF fan, it may be necessary to locate the DB10 in front of an elbow. (See additional
installation instructions on Pages 2 and 3.) Be certain to allow adequate space for the switch. Refer to the dimensional data
shown below. For optimum switch sensitivity, the diaphragm must be mounted vertically. Refer to the illustrations in the
middle of Page 2 of these instructions for correct and incorrect switch diaphragm positioning. The switch should be
mounted within 30 inches from the point where the pressure tap will be inserted into the dryer exhaust duct.
Installation Instructions
Step 1. Selecting Switch Location
Switch must be located between the dryer
and the booster fan in order to work
properly. Switch can be installed at any
point along the duct run. However, if the
switch is used in conjunction with an RVF
fan, the best location may be upstream of
an elbow. (Refer to Page 3 of these
instructions for additional installation
details.)
DB10599A
1712 Northgate Blvd. - Sarasota, FL. 34234
Phone: [phone] Fax: [phone]
Phone: [phone] Fax: [phone]
Web Site www.fantech-us.com

Step 3. Installing Grommet and Tubing
Note: Grommet should be mounted no more than 30 inches from the
pressure switch in order to allow the tubing to reach from the switch
to the duct.
First, drill a 1/4 inch to 5/16 inch diameter hole in the duct wall.
Carefully insert the grommet into the hole. (Drilling a metal duct
may produce burrs. Be careful not to be cut or pricked by the burrs
or the duct.) Next, force one end of the tubing over the nipple on the
switch. It may be necessary to use a lubricant in order to slide the
tubing over the entire nipple. Make a mark a distance of 1/2 inch
from the other end of the tubing. Slide this end of the tubing through
the center of the grommet up to the mark as illustrated. Do not use a
lubricant on this end of the tubing.
For some installations, it may be necessary to insert the grommet
and tubing, or duct “pressure tap”, in the upstream side (side the air
enters) of an elbow. Applications which may require that the tap be
located upstream of an elbow include installations with an RVF fan
mountedattheendofalongstraightductrun(15’ormore)orregions
in higher elevations.
Horizontal Mounting
Switch Above Framing
Switch Below Framing
Switch Above Framing
Switch Below Framing
Angled Mounting
Vertical Mounting
Switch Parallel to Framing
Correct Switch Positioning - Diaphragm Positioned Vertically Incorrect Switch Positioning
Horizontal Framing
Angled Framing
Pressure Switch Diaphragm Positioning
Step 2. Mount Switch
Note: Switch diaphragm must be mounted vertically
for optimum sensitivity. Refer to illustrations below.
When mounting the switch to a stud, joist, rafter, etc.,
in order to prevent the tubing from being crimped,
locate the nipple so that it clears the edge of the beam.
(Refer to illustration at left.) Using the wood screws
provided, secure the switch to the beam. When
mounting the switch to a wall, mount the 1/2” spacers
provided between the switch mounting bracket and
thewall to prevent the tube from being crimped. When
mounting the switch to drywall, concrete, etc., it is
recommended that the anchors provided be used to
securely hold the screws.

Electrical Connection
DO NOT CONNECT POWER SUPPLY UNTIL SWITCH IS COMPLETELY INSTALLED. MAKE SURE ELECTRICAL
SERVICE TO THE SWITCH IS LOCKED IN "OFF" POSITION.
WARNING: TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS - OBSERVE THE FOLLOWING:
1. Use this unit only in the manner intended by the manufacturer. If you have questions, contact the factory.
2. Before servicing or cleaning, switch power off at service panel and lock service panel to prevent circuit from being switched
on accidentally. When the service disconnecting means cannot be locked, securely fasten a prominent warning device, such
as a tag, to the service panel.
3. Installation work and electrical wiring must be done by qualified person(s) in accordance with all applicable codes and
standards, including fire-rated construction.
4. When cutting or drilling into wall or ceiling, do not damage electrical wires or other hidden utilities.
Note: DB10 is suitable for use only with the following fans:
FR100, 110, 125, 140, 150, 160, 200, 225; K/FX4, 4XL, 5, 5XL, 6, 6XL,
8, 8XL, 10; RVF4, 4XL, 6, 6XL, 8XL; RE(C)/KRD(C) 6, 8XL.
Wiring Procedure
Step 1. A 4”x4” junctionbox(J-Box) isrecommendedfor adequate
space for all wiring connections. The box should be mounted a
maximumof 4 inchesfrom the switch.(Refer to illustrationsabove.)
Step 2. Using the wire nuts provided, connect the incoming
electrical supply, the switch leads and the power supply to fan as
shown in the schematic on the right.
Additional Installation otes:
DB10 used with an RVF Series Fan
The RVF Series fans create very little resistance against the dryer
fan air flow when the RVF fan is not operating. A minimum
amount of pressure (approximately 0.05” - 0.07”) is required in
order to trigger the switch. For installations where there is a long
horizontal duct run prior to terminating at the fan, it may be
necessary to insert one or two elbows. The elbow(s) increase the
static pressure on the upstream side of the elbow. As illustrated,
the duct pressure tap should then be installed in the upstream side
of the first elbow. The dotted lines show an alternate location for
the pressure tap for systems with one elbow added. As an
alternative to inserting an elbow near the fan, the switch and
pressure tap may be located upstream of an existing elbow (as
shown on Page 2) or may be installed closer to the dryer.
Additional Installation otes:
DB10 used with an Inline Fan
Unlike the RVF Series, the FR and FX Series fans create enough
resistance to the dryer fan flow to trigger the pressure switch. When
using the switch with an inline fan, the switch and pressure tap
may be installed near the fan or at any point along the duct between
the dryer and the fan. One advantage to locating the switch and
pressure tap near the fan are proximity to one another for servicing,
maintenance, troublshooting, etc.

WARRANTY and MAINTENANCE
Recommended Maintenance
1. Since fan bearings are sealed and provided with an internal lubricating material, no additional lubrication is necessary.
2. Fan impeller may accumulate lint. Periodic inspection, based upon dryer usage, should be performed to ensure that the fan impeller is not obstructed or
loaded with lint. Under normal conditions, fan should be inspected a minimum of every Six (6) Months. Note: Excessive booster fan noise or vibration may
be an indication of lint buildup on the impeller. To inspect and clean the impeller:
a. Disconnect the incoming power supply at the source.
b. Remove the duct from the fan inlet and remove any lint buildup on the impeller.
c. Reconnect the duct to the fan. Turn power supply on.
Troubleshooting
Important Notice: Prior to performing Steps 1 - 4, be certain that the electrical supply to the fan/switch is turned off
If fan fails to start when the dryer cycle begins, please follow the procedure listed below:
1. Check the incoming supply for proper voltage.
2. Consult schematic shown on Page 2 to ensure proper connection. For additional reference, fan wiring diagrams are shown below.
3. Use a meter to test for continuity across the fan motor leads. In order to do this, the capacitor must be disconnected (do not test the capacitor - capacitors
do not meter continuity). If motor leads show continuity, rewire the fan.
4. Turn on the electrical supply and restart the dryer cycle. Check to be certain that fan starts.
If fan still fails to start after performing Steps 1 - 4, continue following the procedure as listed below:
5. Verify that the pressure switch diaphragm is vertical as illustrated on Page 2 of these instructions. If the diaphragm is not vertical, reposition the pressure
switch and check for fan operation against another dryer cycle.
6. Verify that the tubing is not crimped and that the tubing connections are not obstructed.
7. If switch diaphragm is vertical and fan still fails to start, with the electrical supply on:
a. Remove the tubing from the grommet in the duct and blow gently into the tubing;
b. If fan starts, consult Fantech for additional technical support.
8. If fan fails to start after blowing into the tubing:
a. Disconnect incoming power supply at the source.
b. Connect the incoming power supply directly to the fan motor as shown in the appropriate diagram below.
c. Turn on power to fan.
9. If fan fails to start, please consult Fantech for additional technical support.
FIVE (5) YEAR WARRANTY
THIS WARRANTY SUPERSEDES ALL PRIOR WARRANTIES
FOR FACTORY RETUR YOU MUST:
1) Have a Return Materials Authorization (RMA) number. This number may be obtained by calling
FANT CH, INC. at 1-800-747-1762. Please have Bill of Sale available.
2) The RMA number must be clearly displayed on the outside of the carton, or delivery will be
refused.
3) All product being returned must be shipped prepaid and be accompanied with a copy of the Bill
of Sale.
4) Product will be replaced/repaired and shipped back to buyer. No credits will be issued.
DURI G THE FIRST THIRTY (30) DAYS:
FANT CH, INC. will replace any product which has a factory defect in workmanship or material.
Product may be returned to either the point of purchase or the FANT CH factory, together with
Bill of Sale, for an immediate replacement.
DURI G THE FIRST THREE (3) YEARS (excluding the above 30 day period):
FANT CH, Inc. will replace any product which has a factory defect in workmanship or material.
Product must be returned to the FANT CH factory, together with Bill of Sale, and identified with
an RMA number.
DURI G YEARS FOUR (4) and FIVE (5):
FANT CH, INC. will repair or replace any product which has a factory defect in workmanship or
material. Product must be returned to the FANT CH factory, together with a Bill of Sale, and
identified with an RMA number.
THE FOLLOWI G WARRA TIES DO OT APPLY:
Damages from shipping, either concealed or visible. Claim must be filed with the carrier.
Damages resulting from improper wiring or installation.
Damages caused by acts of nature, or resulting from improper consumer procedures such as:
Improper Maintenance,
Misuse, abuse, abnormal use, or accident, or
Incorrect electrical voltage or current.
Removal or alteratation made on the FANT CH label control number or date of manufacture.
Any other warranty, expressed, written or implied, and to any consequential or incidental damages,
loss of property, revenues, or profit, or costs of removal, installation or reinstallation, for any
breach of warranty.
WARRA TY VALIDATIO :
The end user must keep a copy of the Bill of Sale to verify purchase date.
Schematic for all FR, FX, RVFand RE/REC Models
ote: Ground FX, RVF and RE/REC Models beneath a screw in the terminal box.
o ground is necessary for FR Models.