A summer fan switch has been added to the main electric control box. This will provide low speed air circula-
tion during the summer time when the furnace is not being used. Depress rocker switch to “Summer Fan”
position, the switch will light and the fan will run.
There is also an override switch located on the wood/oil fan/limit switch. This should always remain pulled out
in the “AUTO” position (pushing the button in will cause the fan to operate on high speed).
As an alternative, when the wood furnace is connected in a “Add On” con
fi
guration with a back up furnace, the
continuous fan call on the back up thermostat, can be used to circulate air in the non-heating season.
Under no circumstances should any method (Summer Switch, Override Switch on Fan/Limits, Continuous Fan
Mode on Back Up Furnace Thermostat) be used to provide continually circulating air when the wood furnace is
being operated.
An HRV (Heat Recovery Ventilation System), can be connected to the HVAC system but must
NOT
be con-
nected in such a way that it controls the operation of the circulation blower. The control logic shall be such
when the wood furnace (or back up furnace in an “Add On” con
fi
guration) turns on the circulation blower, this
should signal the HRV to operate.
8.5 CONTROL SYSTEM - SUMMER FAN/CONTINUOUS FAN/HRV’S
Expansion / contraction noises during heating up and cooling down cycles are normal and to be expected.
When
fi
rst installed, the furnace brick and metal are cold and must become hot before the appliance will func-
tion well. During the break-in period (the
fi
rst 2 or 3
fi
res) create only small, hot
fi
res using kindling; this will
allow the
fi
rebrick to cure. Do not be alarmed if small hairline cracks develop in the
fi
rebrick. This is a normal
occurrence and does not pose a safety hazard. The paint may also smell a little for the
fi
rst few
fi
res as it
cures and you may wish to open a door or window to alleviate the smell.
There are many different ways to start a
fi
re, review the hints and warnings in this section to ensure the
fi
re is
started properly.
8.6 OPERATING SOUNDS AND SMELLS
H3.65A
DO NOT USE “FAN SUMMER SWITCH (ON MODE)”, “OVERIDE SWITCHES (MANUAL POSITION)”,
“CONTINUOUS FAN OPERATION ON BACK UP FURNACE (IN “ADD ON” CONFIGURATION)”, WHEN
OPERATING THE WOOD FURNACE.
DO NOT CONNECT HRV’S SO THEY ARE CONTROLLING THE CYCLING OF THE FURNACE
CIRCULATION BLOWER.
FAILURE TO COMPLY WITH THIS WILL RESULT IN EXCESSIVE COOLING OF THE EXHAUST
PRODUCTS AS THEY PASS THROUGH THE EXCHANGER PIPES, THE FURNACE FLUE AND
THE CHIMNEY SYSTEM. THIS COOLING WILL RESULT IN THE CONDENSATION OF EXHAUST
PRODUCTS IN THE EXCHANGER AND CHIMNEY RESULTING IN EXCESSIVE CREOSOTE BUILD UP.
THE CREOSOTE BUILD UP WILL RESULT IN REDUCED EFFICIENCIES OF THE EXCHANGER TUBES
AND MAY CAUSE A CHIMNEY FIRE.
W415-1506 / A / 12.04.15
74
IOM
EN
