Blue Bird M380 2003, Owner'S Manual

Page: 192 / 579

4-10 – Interior and Exterior Systems Operation – Heating Systems__________________________M380 Owner’s Manua
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4-10-2 Rev. “F”
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Optional bottom exhaust – mostly used in motor homes.
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Includes four zone heating control for up to four thermostats.
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Completely modular and field serviceable (user friendly).
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Hookups and connections are easily accessible.
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Electronically controlled. Safety features include four-second shutdown in case of failure,
LED digital readout on the electronic control panel for indicating faults, aquastats for
monitoring water temperatures and a photodiode to monitor the flame.
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Complete with remote control panel with ON/OFF reset button, LED digital readout, and
signal horn.
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Jumper for constant pump circulation (Automatic cycling when off).
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All heaters cycle at an operating temperature of 180°F (82°C) with overheat cutout set at
195°F (90.5°C).
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Air accumulator installed in the fuel line to collect air bubbles and prevent them from reaching
the burner and causing nuisance shutdowns.
The Hurricane Hydronic Heating Systems have been tested to UL 307A “Liquid Fuel-Burning
Appliance for Manufactured Homes and Recreational Vehicles” and is listed by Testing Engineers
International Inc. – Listing Services (TEI-LS) for Recreational Vehicle and marine use.
4-10.2 Operation
4-10.2.1 Starting the Heater
The major steps in starting the heater are as follows:
1. Turn on the ON/OFF control switch, located on the remote indicator panel.
2. Turn up the zone thermostat to a setting higher than room temperature.
3. Start the heater by switching the service switch to ON. This switch is located on the side of
the electronic control box located next to the unit in the bay.
4-10.2.2 Signs of Normal Operation
When the heater is operating normally:
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The ignitor will glow and the combustion air intake fan and the circulating pump begin to run.
Whenever the pump is running, the green LED at the bottom of the LED display will be on.
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A few seconds later, the fuel pump starts delivering fuel to the regulator, the compressor
turns ON, the fuel valve opens, and fuel is drawn to the air aspirating nozzle. The fuel is
atomized and sprayed into the combustion chamber to start combustion.
After the ignition period (about 10 seconds), the ignitor shuts OFF, and the burner continues to
operate. The heater will operate until all the zone thermostats are satisfied, or until the heater reaches
its normal water operating temperature of 180°F. Once the normal operating temperature is reached,
the burner itself will cycle off and the combustion fan will operate for an additional two minutes to
purge the burner. If a zone thermostat, domestic water heater aquastat, or engine heat exchanger
aquastat is not satisfied, the circulating pump will continue to operate. If a thermostat cannot be
satisfied by the residual heat in the system, and the water temperature drops, the burner will restart
and cycle until all thermostats are satisfied. Once all thermostats are satisfied, the heater will go
through the two minute purge, and the circulating pump will ease. The circulating pump will operate if
the remote switch and any zone thermostat or the domestic water aquastat are on. The circulating
pump will be activated independently by the engine heat aquastat. After the heater has been running
for a little while, the water outlet of the heater case should become warm. If the water hose leaving
the outlet of the heater does not warm up immediately after the pump comes on, water is not
circulating properly and air may be in the system. Turn the heater OFF immediately and check water
circulation, refer to
Section 4-10.6.11 Water Filling Procedure later in this manual.