General Operating Instructions; Control System - Wood Furnace; Control System - Secondary Furnace "Add On", "Wood/Oil", "Wood/Electric", "Wood/Oil/Electric" Configurations - Napoleon HYBRID 150 Operating Instructions Manual

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8.0 GENERAL OPERATING INSTRUCTIONS

8.1

CONTROL SYSTEM - WOOD FURNACE

○ Control of the woodburning section of the furnace is by adjustment of the primary air control located on
the top rear right corner of the HMF150. This control operates in two set positions - "Full Open" allowing
maximum combustion air delivery to the fi re box and "Closed", providing minimum primary air to the fi re
box to assist the development of secondary or gasifying burn in the top of the fi re box (Note that secondary
combustion air enters through two inlets on the front of the furnace either side of the ash lip tray and is not
adjustable).
IN NO WAY SHALL THE PRIMARY AIR CONTROL SYSTEM BE ALTERED TO INCREASE COMBUSTION
○ In the automatic mode the adjustment of primary air is
accomplished using a shutter connected to a small servo motor.
The control circuitry will energize the motor if it detects the room
thermostat is calling for heat and the high limit sensor in the
supply plenum has not been surpassed (greater than 250°F).
The primary air shutter will be fully opened and will remain so
unless the room temperature has been satisfi ed or too much
heat is detected in the plenum.
○ In the case where there has been a power outage it is possible
to increase the output of the fi rebox by manually adjusting the
primary air control shutter. On the front face of the primary air
control box a control arm and handle protrudes out. To increase
combustion push down on this handle, moving it towards the
bottom of the clearance slot, keep the rod down by swinging
the clasp (also mounted to the front of the primary air control
box) over top of the rod. This will continuously maintain the
maximum combustion air being fed into the fi re box. Although
the blower fan will not be inoperable in a power out situation,
convection air fl ow through to the house will move under gravity
circulation.
HIGH TEMPERATURES CAN BUILD IN THE HORIZONTAL DUCT WORK, TO ENSURE AIR
CIRCULATING IN A GRAVITY METHOD, ENSURE ALL SUPPLY AND RETURN AIR GRILLS ARE NOT
BLOCKED BY HOUSEHOLD ITEMS OR DEBRIS, AND ENSURE ANY MANUAL DAMPERS IN THE
8.2 CONTROL SYSTEM - SECONDARY FURNACE "ADD ON", "WOOD/OIL",
"WOOD/ELECTRIC", "WOOD/OIL/ELECTRIC" CONFIGURATIONS
○ Control of the secondary heat source (either electric or oil) is done by a combination of a selector switch
on the main furnace control panel and a second thermostat located beside and at the same height as the
wood furnace thermostat. The selector toggle switch needs to be switched to the appropriate back up
furnace installed (can be switched to either oil or electric depending on energy rates if both backups are
installed). The thermostat for the back up heat source should be set 2°C to 3°C below the setting for the
wood thermostat. Thus once the heat from the wood section starts to decline, the corresponding decline in
room temperature will cause the second thermostat to call heat from the secondary heat source. Note that
interlocks in the control system will force the secondary heat source to shut down if the temperature in the
supply plenum of the wood furnace exceeds the set value of the "High Limit" switch (250°F).
W415-0910 / A / 09.16.10
AIR FLOW GREATER THAN THE FACTORY PRESET MAXIMUM.
DUCT NETWORK ARE FIXED IN A FULL OPEN CONDITION.