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9
Power Outage
During a power outage, the furnace will shut down safely. It will not automatically restart when the
power returns, unless the exhaust is still up to temperature (see “Lighting Instructions”).
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Overheating
A high temperature fan limit switch will automatically shut down the furnace if it overheats. The
furnace will need to be manually re-lit. Allow 45 minutes before re-lighting.
The circuit board is equipped with a 5 amp. Fast acting fuse. If the unit does not operate and there is
power coming into the unit, check and replace the fuse. Always replace with a fast acting fuse.
The Magnum 7500 is equipped with a fan limit control system that is installed 10” above the top of the
unit. This fan limit control must be operational and not set on manual fan operation. The fan limit
control will turn the room air blower on and off with the correct temperature and will shut the fuel feed
off if the unit overheats or there is an obstruction in the duct work.
IMPORTANT:
Make sure that the power source conforms to the requirements of the furnace. It is
highly recommended that you run a separate circuit to assure constant power. A 15 amp circuit is needed.
Disconnect the power source before performing any maintenance or electrical service work.
Plug the power supply cord into a surge protected and grounded 15-amp branch circuit. The outlet must
be checked for correct polarity. Check the outlet for a minimum 115 volts and that the branch circuit is
not overloaded with too many appliances hooked to it. Run a separate circuit if it is overloaded.
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The
Magnum 7500
can be installed with and operated by a wall-mounted thermostat. However, a
wall thermostat is not provided with the furnace. A wall thermostat can be purchased from your
reseller or at most home improvement centers or hardware stores. We recommend the Honeywell
model T87F or equivalent low voltage thermostat
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Most thermostats will have instructions with them as to where to place them in your room. Please
follow the thermostat manufacturer’s instructions carefully. Use thermostat wire (18/2).
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There are two (2) male spade terminals on the back of the control panel near the center. Connect the
two wires from the wall thermostat, one to each of these spade terminals.
Needed:
2 female ¼”
insulated terminals.
9
Make sure that the wires are routed to protect them from hot surfaces. Do not cross wires with
circuitry on board.
AUTOMATIC SAFETY FEATURES
WARNING
These automatic safety features must not be bypassed.
THERMOSTAT INSTALLATION
