Bradford White 30S Installation & Operating Instruction Manual page 15

T'stat information Continued-
If there is back draft caused by down draft, DO NOT operate the burner until
this situation is corrected. Back pressure (back draft or down draft) may also
be caused by the chimney termination being lower in elevation than
surrounding objects, such as buildings, hills, trees, rooftops, etc. Back
pressure may also be caused by an exhaust fan in the building.
IMPORTANT REMINDERS
1. Install all electrical work in strict accordance with local codes and
ordinances.
2. All unions must be of the ground seat type.
3. A check valve shall be installed in the suction line when the oil storage tank
is below the burner to prevent the return of the oil to the oil storage tank
when the fuel unit is not in operation.
4. Lubricate oil burner motor.
5. Set the draft to a range of -.02" to -.05".
6. See that the smoke pipe enters into the chimney far enough to be tight and
not so far as to reduce flue area. Its end should be flush with the inside of
the chimney.
7. Be sure that there is at least -.01" draft over the fire.
8. Be sure that there is no backpressure such as down draft or back draft.
9. Be sure that there is sufficient air in heater room for proper combustion at
all times.
10. Explain the operation of the burner to the owner -show where to oil -how
to operate controls and main cutout switch.
11. Hang burner-operating instructions as supplied with burner in prominent
place near installation.
Hydrogen gas can be produced in a hot water system served by
this water heater that has not been used for a long period of time
(generally two weeks or more). Hydrogen gas is extremely
flammable. To reduce the risk of injury under these conditions, it is
recommended that the hot water faucet be opened for several
minutes at a convenient sink before using any electrical appliance
connected to the hot water system. If hydrogen is present, there
will probably be an unusual sound such as air escaping through
the pipe as the water begins to flow. There shall be no smoking or
open flame near the faucet at the time it is open.
CAUTION:
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