Signal Conditioner; Ignition Control (Hsi); Ignition Control (Spark) - LB White Guardian AD060 Manual Del Usuario

22
Guardian with Smart Sense™

Signal Conditioner

The conditioner receives the incoming electrical signal
from the building's environment control and then ampli-
fi es it to allow operation of the heater's variable rate
gas control valve.
This component operates off of 24 VAC received from
the transformer in the heaters control box.
If the transformer does not supply 24 VAC to the condi-
tioner, or if the conditioner is defective, the variable rate
gas control will operate at minimum heat output only.
(See data plate or page 4 of this manual for minimum
output, depending on model.)
FIG. 18
24V transformer Output to the gas
connection control valve

Ignition Control (HSI)

The control sends and receives voltages to operate or
verify operation of components. Refer to the following
and Fig. 19 to understand the ignition control's terminal
designators if doing voltage checks on the control.
IND: 120 VAC from control to motor
L1: 120 VAC to control
HSI: 120 VAC to hot surface igniter
HSIG: Neutral return of igniter
L2: Neutral of control
W: 24 VAC input from 40 VAC transformer (without this
voltage the ignition control will not function)
PSI: 24 VAC from control to air proving switch
FSI: Microamperage from control to fl ame sensor
GV: 24 VAC from control to high limit and then to gas
control valve.
PSO: 24 VAC return from air proving switch back to
control
FSG: Ground of fl ame sensor
C: Ground for control
Owner's Manual • Guardian
Refer to "Hot Surface Igntion Operation Sequence"
within this manual to understand operation of the
ignition control during a call for heat.
FIG. 19
Selector

Ignition Control (Spark)

Switch
Like the controller for the hot surface igntion heat-
ers, the spark igntion control sends and receives
voltages to verify operation of components. Refer
Building con-
to the following and Fig. 20 to understand the igni-
troller control
tion control's terminal designators if doing voltage
signal connec-
checks on the control.
tions (screw
terminal) mA or
L1: 120 VAC to control from power supply
DCV
IND: 120 VAC from control to fan motor
LED: Connection for control's diagnostic light
wiring harness
MV: 24 VAC from control to high limit switch and
then to the gas control valve.
PS2: 24 VAC from air proving switch back to
control
PS1: 24 VAC from control to air proving switch
W: 24 VAC from 40 VAC transformer to control
(without this voltage the ignition control will not
function)
FS: Microamperage from control to fl ame sensor for
proving burner fl ame
R: No terminal
X: No terminal
C/COM: Control and burner ground
Refer to "Spark Igntion Operation Sequence" within
this manual to understand operation of the ignition
control during a call for heat.