Basic Operation - LB White Guardian AD060 Manual Del Usuario

6
Guardian with Smart Sense™

Basic Operation

This heater uses Smart Sense™ technology for
variable rate heat control. L.B.White has worked with
agricultural building control manufacturers for the
proper implementation of the Smart Sense™
variable rate heating control logic. If you have ques-
tions on whether or not your control incorporates the
Smart Sense™ control logic, call L.B.White Co.
When integrated to a building controller, precise,
automated control of the environment is achieved
by operating the heater over a broad heat range
from 25% of total heat output up to maximum heat
output. This provides better, more even temperature
distribution by allowing the heater to operate at the
output necessary to maintain temperature. This
results in consistent temperatures and reduced fuel
consumption.
As shipped from the factory, the heater
is wired to start and operate at minimum
heat. Connection to a building control-
ler capable of providing 0-10 VDC, 0-20
milliamp, or 4-20 milliamp signal for the
heater's Smart Sense™ gas control valve
is required for further operation. See Fig.
1 for a typical system diagram.
FIG. 1
FANS
Owner's Manual • Guardian
Sequence of Operation
a. Building controller determines that heat is required.
b. Building controller closes the heating contact, provid-
ing power and the control signal to the Smart Sense
heater.
c. The Smart Sense™ heater starts at the minimum
operation position.
d. The Smart Sense™ control logic incorporated in the
building controller then manages the output of the
Smart Sense™ heater as necessary to achieve and
maintain the desired room temperature.
Note: When properly set up, the Smart Sense™
e. If the building controller determines that heat is no
longer required, it will shut the heater off and then
will initiate the heating sequence again when heat
is required.
BUILDING CONTROLLER
0-10 VDC, 0-20 mA, or 4-20 mA CONTROL
120 VAC TO HEATER
GUARDIAN WITH SMART SENSE™
ROOM SENSORS
variable rate heater will run for long periods of
time - much longer than typically experienced
with on/off heating. This is normal and is key to
achieving the consistent air temperatures and
fuel savings associated with Smart Sense™
variable rate heating.
SMART SENSE™
SIGNAL TO HEATER
GUARDIAN
HEATER(S)