Aqua-Hot Hydronic Heating System Shop Manual 09/04
®
SECTION 4: ELECTRONIC CONTROLLER
Electronic
Controller
4.1
Electronic Controller
4.2
Electric Heating Element Status Indicator Light
This indicator light will illuminate GREEN whenever the Aqua-Hot’s
120 VAC Electric
Heating Element
is operating and providing the heat to the Aqua-Hot’s
Boiler Tank
;
reference Figure 5. Please note that this light will only be active if the “
Electric”
switch is
in the
ON
position; reference Figure 4. If this indicator light illuminates RED, it indicates
an electrical or overload condition (i.e., a short) has occurred in the Electric Heating
Element’s VDC powered circuitry.
4.3
Heating Zone Status Indicator Lights
These five indicator lights (separately) will illuminate GREEN whenever a
Zone Thermo-
stat
for a particular zone is calling for heat; reference Figure 5. The GREEN indicator
lights also indicate that VDC power is being supplied to the particular interior heating
zone’s
Heat Exchangers
(i.e., fan motors). If any of the five indicator lights illuminate
RED, it indicates that an electrical overload condition (i.e., a short) has occurred in a
particular heating zone’s circuitry.
NOTE:
A short, in either a heating zone’s
Thermostat
or a heating zone’s
Heat
Exchanger
circuit, will cause the indicator light to illuminate RED.
Figure 5
#5
#4
#3
#2
#1
Electric Heating
Element Status
Low Voltage
Reset
Low Tank-Level
Cutoff
Heating Status
Engine Preheat
Pump
Low Battery
Voltage Fault
Low Temp
Cutoff Status
Overload Fault
Pump #2
Pump #1
Pump #3
Diesel-Burner
Status
Heating Zones
Status
ELECTRONIC CONTROLLER
Page 6
