Table des Matières
Publicité
Les langues disponibles
Les langues disponibles
1)
MAINTENANCE
After inspection, a complete combustion test must be
performed after each annual service of the unit to
maintain optimum performance and reliability.
WARNING
Turn off the power and fuel supplies before
performing service work. The 115 volt circuit
is a potential electrocution hazard.
1.1)
Heat exchanger :
The entire heat exchanger should be inspected
annually for soot accumulation. If the burner is
operating normally there should very little soot
accumulation. If the heat exchanger requires scale
removal, use a wire brush first to loosen the scale and
then vacuum the soot and scale that has fallen into
the secondary heat exchanger (radiator) section. You
will find that a 36" long flexible hose attachment will
be helpful to reach into the back of the radiator; a
piece of 1/2" flexible gas connector, or a piece of 1/2"
liquid-tight vinyl jacket metallic electrical conduit
works well as a makeshift device.
CLEANING THE HEAT EXCHANGER
Remove the 4-bolt flange from the front of the furnace
to reveal the clean-out port and check for soot
deposits. If there is very little soot in the radiator
section visible from the clean-out port, you will not
need to clean it. However, if you notice scaling in the
radiator, you should remove the scale.
The wrap-around radiator can now be cleaned entirely
from the front inspection port. Also the furnace has
external clean-out ports so the soot does not fall into
the fan compartment during the cleaning operation.
DO NOT VACUUM THE CERAMIC CHAMBERS—
they are easily damaged.
Soot will have collected in the first sections of the heat
exchangers only if the burner was started after the
combustion chamber was flooded with fuel oil, or if the
burner has been operating in a severely fouled
condition.
20
PART 3
MAINTENANCE
1.2)
Refractory fire pot :
Remove the burner and check the fire pot.
IMPORTANT:
cleaning of the pot is required. After firing,
the pot becomes very fragile.
If the pot is damaged, it must be replaced. A damaged
pot could lead to premature heat exchanger failure.
Cracking of the fire pot is normal, however, replace
the pot if the cracks have propagated more than 2/3
the way through the wall thickness. The average wall
thickness of the combustion chamber is 3/4".
FLOODING OF THE FIRE POT
Flooding can occur when the oil primary control has
been reset a number of times in a no-heat situation.
Each time oil is fired into the pot and does not ignite, it
is absorbed in the pot. Even if the burner is removed
and the pot is felt for wetness, it is difficult to assess
the degree of oil absorption by the pot.
IMPORTANT:
warning light on the burner, push once ONLY
to try and restart. If the burner will not start,
phone your authorized service agent. Do not
press the button again.
There is only one way to properly service a flooded
fire pot, and that is to change it.
SELF-ALIGNING COMBUSTION CHAMBER
a. The primary heat exchanger is comprised of an
upper and lower half. The lower half is essentially
a "can" that houses a self-aligning combustion
chamber. the combustion chamber will fit into the
bottom half in one orientation only.
b. A slot in the front of the combustion chamber acts
as a track that captures a burner tube sleeve that
extends into the bottom heat exchanger half. This
provides automatic rotational alignment, vertical
alignment.
c. Five tabs around the bottom and four tabs around
the top provide automatic centering of the
combustion chamber.
Use
extreme
care
If you observe the red
if
Publicité
Table des Matières
