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3
OPERATION
3.1
START-UP
Before starting up the unit, be sure to check that the following
items are in compliance:
1.
The electrical
installation,
the oil supply
system,
the
venting system, combustion air supply and ventilation;
2.
The blower access door is in place and the blower rail
locking screws are welt tightened;
3.
The Blocked Vent Shut-Off (BVSO) is installed according
to instructions (for chimney venting);
4.
The oil supply valve is open;
5.
The burner "Reset" button is welt pushed in or re-armed;
6.
The preliminary air adjustments
on the burner comply
with the technical specifications
in this manual;
7.
The
blower
speed
adjustments
for
heating
and
air
conditioning
are
appropriate
and
according
to
the
specifications
in this manual;
8.
The blower start/stop delays are satisfactory;
9.
The thermostat of the room is in the heating mode and is
set higher than the ambient temperature.
To start the unit, turn the main electrical switch on. operating
sequence oil heating mode
3.2
OPERATING
SEQUENCE
OIL HEATING
MODE
1.
The W-R contact closes;
2.
The burner motor starts up to pre-purge the combustion
chamber for a period of 10 to 15 seconds. During that time
a spark is established on the electrodes;
3.
The solenoid valve opens and a flame
is established.
Shortly after, the electrodes cease to spark;
4.
Then the blower runs up to full speed. The delay depends
on the adjustments
that were made on the electronic
board, which controls the blower motor. Refer to Sections
2.11 and 2.12, as well as the CFM tables 8 and 9 for more
details.
5.
When the call for heat is satisfied,
the solenoid valve
closes, the flame goes out and the burner motor stops
(after post purge delay, if applicable).
6.
The blower
stops shortly
after the burner.
The delay
depends
on the adjustments
that were
made on the
electronic
board
that
controls
the
blower.
Refer
to
Sections 2.11 and 2.12, as well as the CFM tables 8 and 9
for more details.
Note: A detailed
operating
sequence
of the oil burner
is
outlined in the instructions provided with the burner.
3.3
CHECKS
AND ADJUSTMENTS
3.3.1
PURGING
THE OIL LINE
Open the bleed port screw and start the burner. Allow the oil to
drain into a container for at least 10 seconds. The oil should
flow absolutely free of white streaks or air bubbles to indicate
that no air is being drawn into the suction side of the oil piping
and pump. Slowly close and tighten the bleed screw. Once
closed, the flame will light up.
3.3.2
PRESSURE ADJUSTMENT
The oil pressure
must
be adjusted
according
to the
Technical
Specifications
of this manual.
An adjustment
screw and a connection for a pressure gauge are located
on the oil pump for that purpose. Also refer to the burner
instruction manual.
3.3.3
COMBUSTION
CHECK
CAUTION
The heat exchanger metal surfaces may have oil and the
baffle insulation also contains binders. These products will
burn or evaporate when the unit operates for the first time.
Because
of that,
the smoke
reading may be skewed
during the first minutes of operation.
Therefore,
the unit
must operate during at least 60 minutes before taking any
readings to adjust the combustion quality. Let the unit cool
down before making any adjustments.
IMPORTANT
The combustion
check verification
MUST be performed
after the nozzle replacement
or the burner cleaning. After
these
manipulations,
the combustion
parameters
are
necessarily
modified. Refer also to the burner instruction
manual.
1.
Pierce a test hole in the flue pipe, approximately
18
inches from the furnace breech. Insert the smoke test
probe into the hole. For installation using a sidewall
venting, use the orifice provided on the breech plate;
2.
From a cold start, let the unit operate for about 5
minutes;
3.
Set the burner air setting until you have between 0
and 1 on the Bacharach Scale (or a "trace");
4.
Take a CO2 sample at the same test location where
the "trace"
of smoke reading was taken and make
note of it. Example: 13.8% of CO2 or 2.5% of 02;
5.
Adjust the burner air setting to obtain a CO2 reading
1.5% lower (or a 02 reading 2.0% higher) than the
reading
associated
with
the
"trace"
of
smoke.
Example: 12.3% of CO2 or 4.5% of 02;
6.
This method of adjusting the burner wilt result in clean
combustion
(Bacharach smoke scale between 0 and
a trace) and ensure
the proper functioning
of the
system.
The optimum
CO2 level is around 12% to
13% (or 3.5% to 5.0% of 02).
3.3.4
DRAFT REGULATOR
ADJUSTMENT
On chimney installations only, a barometric draft regulator
(supplied with the furnace)
must be installed, in order to
ensure proper draft through the furnace. The barometric
damper
must
be mounted
with
the hinge
pins
in a
horizontal position and the face of the damper vertical for
proper
functioning
(see
instructions
included
with the
damper.) After the furnace has been firing for at least five
minutes, the draft regulator
should be set to between -
0.025" and -0.060" W.C.
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