26
Heater Operation
• Check all fuel, electrical and plumbing connections.
• Refill the engine coolant.
• Bleed air from the coolant system & top up coolant.
Upon signal from the operating switch, the heater conducts a sequenced start procedure.
• ECU executes electrical systems check
• Coolant pump and combustion air blower activate.
• Glow pin begins preheat (20-50 seconds)
• Fuel Metering pump starts to pulse.
• Gradual acceleration of blower and increased pulse frequency of fuel metering pump.
• Combustion is established.
• ECU recognizes temperature change via the flame sensor.
• Once acceptable level of combustion is established, the glow pin is switched off
• Typical start up is 1 ½ to 2 minutes.
Note
: If the heater fails to start the first time it will automatically attempt a second start.
If unsuccessful, the heater will shut down completely.
Note
: On initial start up the heater may require several start attempts to self prime the fuel system.
Tech Tip: Heater has a Priming function. (See Operating Switch Instructions).
Upon ignition, the heater will continue to operate as follows:
• Temperature is monitored at the heat exchanger.
• Once coolant reaches 75°C (167°F) or set maximum, heater will automatically switch off (Activates Cool
Down)
• Coolant pump continues circulation and ECU monitors temperature.
• Heater re-starts once coolant temperature reaches 65°C (149°F).
• Heater continues to operate until switched off, either manually, automatically by timer or heater
malfunction shutdown.
Note
: If flame out occurs, heater will automatically attempt one restart.
If successful, it will continue to operate. Otherwise, it will shut down completely with a cool-down
cycle.
Note
: If voltage drops to 10.5 volts or rises above 16 volts, heater will shut down.
Pre-Start
Start Up
Running
