THB & TLB
Oil Furnaces
–
Furnace Manual
12
670-000-005/1010
5
Connect fuel oil piping
General oil piping requirements
•
Location and installation of oil tanks, oil piping and burners must
follow:
•
NFPA 31, Standard for the Installation of Oil-Burning
Equipment.
•
In Canada, CSA B139, Installation of Oil-Burning
Equipment.
•
Local codes and regulations.
•
Information provided with burner and fuel pump.
•
If any part of fuel oil tank is above level of burner, an anti-siphon
device must be used to prevent flow of oil in case of oil line
break.
•
Support oil lines as required by codes.
•
Make tank connections with swing joints or copper tubing to
prevent breaking in case the tank settles. Make swing joints so
they will tighten as tank settles. Non-hardening pipe joint
compounds should be used on all threads.
Do not use Teflon tape as an oil pipe sealant. It can
cause valves to fail, creating hazards. Use only flare
fittings. Do not use compression fittings. Failure to
comply could result in severe personal injury, death
or substantial property damage from oil leakage
and/or fire hazard.
•
Underground pipe must be run in a casing to prevent oil leaking
into ground or under floor. Check local codes for information.
Oil piping connection at burner
•
Connect oil line to burner using a flare fitting.
Use of any connection other than a flare fitting at the
oil connection to the burner could result in a fuel oil
leak, with the potential for severe personal injury,
death or substantial property damage.
•
See local codes for appropriate arrangement and piping of filter,
control valves, etc. connecting to oil tank.
•
Refer to burner manual for oil system requirements. Verify that
suction lift does not exceed stated limit. Where lift exceeds limit
for a one-pipe system, use a two-pipe system as directed in
burner manual.
6
Wire furnace & burner
Electric shock hazard. Can cause severe personal
injury or death if power source, including service
switch on furnace, is not disconnected before
installing or servicing
Wire burner
The burner harness is factory-wired to the furnace at the factory.
Plug the burner harness into the mating burner connector to wire the
burner. Refer to the wiring diagram on pages 14 and 15 for further
information.
Install and wire thermostat
Locate the room thermostat on an interior wall in the natural
circulating path of room air. Do not locate thermostat so it is exposed
to cold air infiltration, drafts from windows or doors, air currents from
supply or return air registers, behind obstructions, on a shelf, in a
closet, or in a corner.
Ensure the thermostat won’t be exposed to heat from nearby
fireplace, radio, television, lamp or rays from the sun. Do not mount
thermostat on a wall over a supply or return duct, chimney or vent.
Wire thermostat to furnace and set thermostat anticipator as shown
on wiring diagram, pages 14 and 15.
Connect power wiring
All wiring must conform to:
•
National Electrical Code, ANSI/NFPA 70, latest edition and any
additional national, state or local codes.
•
In Canada, CSA C22.1 Canadian Electrical Code Part One and
any local codes.
•
Wiring must be N.E.C. Class 1. If original wire as supplied with
furnace must be replaced, type 105
o
C wire or equivalent must
be used. Supply wiring to furnace must be sized for the load
required (see Section 12)
•
Provide electrical ground at furnace as required by codes.
Connect 120 VAC/60 Hertz, single phase separate electrical line
from the main house panel to the power leads in the furnace
electrical box as shown on wiring diagram, pages 14 and 15.
Provide a fused disconnect in the power wiring, following all local
codes.
Ensure the wire size and type are adequate for the electrical load
(see Section 12 and furnace nameplate for value).
Limit control
The furnace is equipped with a fan switch/limit control. This control
limits the air leaving the heat exchanger to 200
o
F or less. The fan
switch continues fan operation until the air drops to a preset
temperature. For most installations, set the blower ON setting at
110
o
F and blower OFF setting at 90
o
F. If a longer cool down period
is desired, lower the OFF setting.
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