13
Fig. 2: Filter rack and dimensions for the OD6 furnace
Electrical Connections
NOTICE: All field wiring must conform to local, state, and national
installation codes.
A disconnecting switch equipped with overcurrent protection rated at 15 A. (e.g. a
time delay-type fuse or inverse time, circuit breaker) should be installed in the
service line.
Since the furnace is entirely pre-wired at the factory, it is only necessary to
connect the building electrical service lines to the two (2) pigtail wires extending
from the junction box. The junction box is mounted inside the furnace burner
compartment or mounted on the front exterior of the furnace, in the case of the
horizontal / counterflow model. A ground connection must also be made in the
junction box. The service lines to the furnace should be no smaller than 14 Ga.,
insulated copper wire with a temperature rating of 60ºC, or greater.
Refer to the electrical diagrams contained in Appendix B of this manual for an
electrical schematic, a connection diagram, and operating instructions.
Room Thermostat
A room thermostat must be connected to the Oil Furnace control. This is
typically a low voltage (24 VAC) circuit. Consult the National Electrical Code,
ANSI/NFPA 70-2017, or latest edition for guidelines for proper wiring methods
and materials for this circuit. The room thermostat should be located on an
interior wall in the natural circulating path of the room air.
The thermostat should not be installed in a location where it is directly exposed
to,
cold air infiltration, i.e. drafts from outside openings such as windows and
doors,
air currents produced by supply air registers, and
heat from a nearby source, such as a fireplace, electrical appliances,
lamps, solar radiation, a wall enclosing warm air ducts, a chimney, or a
flue gas vent.
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