Service manual

— Page 44 —

600-D01 Series Hydronic Heating System Service Manual - Rev. A

Aqua-Hot unit. Indicator lights on the front panel will illu-

minate red if there is a short circuit, overload, or fault condi-

tion within the system. It also will indicate when circuits are

functioning properly with a green indicator light.

SECTION 5: ELECTRONIC CONTROLLER

Electronic Controller Overview

The electronic controller is an electronic circuit board that

controls the electrical functions of the Aqua-Hot heating

system. All wiring for the switch panel is connected to the

electronic controller, as well as the wiring circuitry from the

Electronic Controller General Facts

Nominal input voltage range ............................ 10.6V to 15V

Idle current ................................................... Approx. 15mA

Low voltage cutoff threshold ....................................... 10.0V

Under voltage lockout delay ..................... Approx. 5 minutes

Input Load Currents

Zone thermostats (each) .................................. Approx. 4mA

Diesel-Burner switch ..................................... Approx. 12mA

Electric Element switch ................................... Approx. 4mA

Engine Preheat switch ..................................... Approx. 4mA

Low-level cutoff switch................................. Approx. 10mA

Control Thermostat ......................................... Approx. 8mA

Low-temperature cutoff switch ....................... Approx. 5mA

Output Current Capacity

Zone fans (each) .................................................... 2.0A max.

Circulation pumps (each) ...................................... 2.0A max.

Engine preheat pump ............................................. 2.0A max.

AC relay ............................................................ 500mA max.

B4+ burner (Webasto) power ................................ 6.0A max.

B1+ burner master control ..................................... 2.0A max.

C1/C7 burner thermostat control ........................... 1.0A max.

Figure 21