A.J. Antunes & Co DFL 8743130044 - Manual (Page 2)

A. J. ANTUNES & CO. www.ajantunes.com 180 Kehoe Blvd., Carol Stream, Illinois 60188
DFL Installation Information
1-630-784-1000 Fax: 630-784-1651 Page 2 of 4 P/N 1011096 06/10
1-800-253-2991
Warranty
1. Antunes Controls products are guaranteed to be free
from mechanical and electrical defects for a period of
one year from date of shipment under normal use and
service provided installation is made in accordance
with manufacturers’ recommendations.
2. Parts deemed defective shall be repaired or replaced
at manufacturers option and at manufacturers expense
but shall not include foreign or federal excise taxes,
state or municipal sale or use taxes, all such taxes
not limited to the foregoing being responsibility of the
purchaser.
3. No charge for travel and/or mileage will be allowed to
purchaser.
4. Antunes Controls reserves the right to make changes
in design or make any improvements on any products.
The right is always reserved to modify our equipment
because of new technology, underwriter’s requirements
and/or government regulations.
5. The following are not covered under warranty:
a. Failure from neglect, abuse, careless handling and
mis-application of unit.
b. Failure to observe guidelines for installation or
improper voltage hook-up.
c. Failure caused by improper maintenance.
d. Unless specifically allowed by Antunes Controls, no
other charges may be included under warranty.
Limitation of Liability: If it is understood and agreed
that seller’s liability whether in contract, in tort, under
any warranty, in negligence or otherwise, shall not
exceed the return of the amount of the purchase price
paid by purchaser and under no circumstances shall
seller be liable for special, indirect or consequential
damages. The price stated for the equipment is a
consideration in limiting seller’s liability. No action,
regardless of form, arising out of the transactions may
be brought by purchaser more than one year after the
cause of action has accrued.
Operation
The DFL combines the operation of a single speed fan
control with that of a warm air high limit control. The fan
section of the control activates a p.c. mounted Fan Relay
which is controlled by the Fan Thermistor Sensor. During
the initial power-up state the sensor temperature will be
below the setting set by the front panel potentiometer
labeled Fan Limit and the Fan Relay will be activated
and a front panel Fan LED will light. Once the thermistor
temperature rises above the Fan Limit temperature then
the Fan Relay is de-activated and the Fan LED will
not be lit. The Fan Relay will be re-activated once the
Fan Thermistor Sensor temperature drops below the
Fan Limit potentiometer setting minus front panel HYS
potentiometer setting. As an example, if the Fan Limit
potentiometer is set to 100°F, and the HYS potentiometer
is set to 20°F, then the Fan relay will re-activate once the
Fan Thermistor drops below 90°F. The temperature range
of the Fan Limit potentiometer is from 80°F to 120°F. The
HYS potentiometer adjustment range is 5°F to 50°F.
The operation of the High Limit section of the control is
similar in operation to the Fan Limit except that the High
Limit Relay is activated when the High Limit Thermistor
Sensor temperature is below the setting of the front panel
High Limit set-point potentiometer. Once the High Limit
potentiometer temperature setting has been exceeded
the High Limit Relay will be de-activated and a second
front panel LED labeled Alarm will light. The High Limit
relay will stay de-activated until the High Limit Thermistor
temperature drops below the High Limit set-point
potentiometer minus an internally mounted hysteresis
potentiometer. This internally mounted potentiometer has
an adjustment range of 1°F to 15°F and is accessible only
from inside the control. See figure showing back view of
unit for location of this potentiometer. The control also has
an option of using either 1 or 2 thermistors to control the
Fan and High Limit Relays. This selection is determined
by the position of a 2 pin jumper plug inserted onto the
connector labeled J1. If the jumper plug is inserted so
that positions 2 & 3 are shorted together then only the
Fan thermistor sensor is needed. If however the jumper is
placed between positions 1 and 2 then both Fan and High
Limit thermistors are needed.