WhisperGen PPS16 Installation and Commissioning Manual Rev: 080801
15
7.3.5
External Digital Out
The maximum output current is 100mA.
The External Digital Out is a low current, 5V digital output which allows the
WhisperGen to control the temperature of the coolant by switching an
optional additional water heater on and off. The output is logic only and
cannot drive a relay, but is suitable for digital input to another device.
The EXT Digital Out output terminals are 3+ and 4- of the wiring block. See
Figure 8
: Wiring diagram.
7.3.6
External Temperature
These terminals are not used. They are 1 and 2 of the wiring block.
7.3.7 Fuel
Pump
WARNING:
Only use the fuel pump supplied with the WhisperGen.
The fuel pump is a solenoid-operated piston pump. The speed of operation
of the fuel pump is controlled by the WhisperGen microprocessor. The
positive and negative poles of the fuel pump can be swapped.
The arrow on the fuel pump indicates the direction of the fuel flow.
The fuel pump shall be wired to terminals 16 and 17 of the wiring block. See
Figure 8
: Wiring diagram.
