A.J. Antunes & Co TFH 8503130044 - Manual (Page 2)

A. J. ANTUNES & CO. www.ajantunes.com 180 Kehoe Blvd., Carol Stream, Illinois 60188
TFH Installation Information
1-630-784-1000 Fax: 630-784-1651 Page 2 of 4 P/N 1011095 06/10
1-800-253-2991
Operation: Low Limit/Timer
After power is applied to the TFH, the TFH checks
the temperature of the Thermistor Sensor to verify
that its temperature is below the Low Limit set-point
potentiometer. If the thermistor temperature is below the
Low Limit temperature then an internal timer is reset and
activated. While the timer is activated it will continuously
check the thermistor to see if its temperature rises above
the Low Limit temperature. If the thermistor temperature
stays below the Low Limit set-point for longer than the
time set on the TFH’s time potentiometer, then the unit’s
Low Limit Relay will be activated (energized) and latched.
Note: Once the Low Limit relay has latched only the
removal of input power will reset the TFH’s Low Limit/
timer circuitry. If the thermistor temperature rises above
the Low Limit set-point before the timer has “timed – out”,
i.e. Limit Relay activated, then the Timer is held in reset
state until the thermistor temperature drops below the
Low Limit set-point and the timer circuit again is then
re-activated. The TFH has a visual front panel indicator
for when Low Limit Relay has been activated (lit). This
indicator is located on the left hand side of the front
panel.
Operation: High Limit
The High Limit circuitry of the TFH checks for a
thermistor temperature above the High Limit set-point
potentiometer. If the sensor temperature rises above the
High Limit potentiometer then the High Limit Relay is
de-energized. This relay is normally activated (energized)
when power is applied and is de-activated only if the
thermistor temperature exceeds the High Limit set-point
potentiometer. Once the High Limit Relay is de-activated
it will stay de-activated even if the thermistor temperature
drops below the High Limit set-point. The High Limit
Relay can only be re-activated if first the sensor
temperature is below the High Limit set-point and then
the Reset button, on the TFH’s front panel, is depressed.
The de-activation of the High Limit Relay also results in
the right side indicator becoming activated (lit).
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.