Weil-McLain UO-3 CV - Manual (Page 20)

6104BAFG R0

Page 19
Startup / Checkout
If the burner or control fails any of the following tests,
recheck control wiring. If the burner or control still fails
any tests, replace the control.
Check Safety Features
Safe Start Check
Place a jumper across the cad cell terminals.
Refer to the steps for “Start up burner/set
combustion” and have the system call for heat.
Burner must not start. Verify that the green light
is on continuously and that the control remains
in Standby mode.
End the call for heat and remove the cad cell
jumper.
Simulate Flame Failure and Ignition Failure
Refer to the steps for “Start up burner/set
combustion” and have the system call for heat.
After fl ame is established and the burner igniter
turns off, close the hand valve in the oil supply
line.
At fl ame loss, the control will enter Recycle
mode. Verify that the green light is fl ashing. The
control will remain in Recycle for 60 seconds.
▪
○
1.
2.
3.
4.
○
1.
2.
3.
Do not attempt to start the burner when excess
oil has accumulated in the appliance, the ap-
pliance is full of vapor, or when the combustion
chamber is very hot.
Do not attempt to re-establish fl ame with the
burner running if the fl ame becomes extin-
guished during start-up, venting, or adjustment.
Vapor-Filled Appliance: Allow the unit to cool
off and all vapors to dissipate before attempting
another start.
Oil-Flooded Appliance: Shut off the electrical
power and the oil supply to the burner and then
clear all accumulated oil before continuing.
If the condition still appears unsafe, contact the
Fire Department. Carefully follow their directions.
Keep a fi re extinguisher nearby and ready for
use.
y
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Failure to follow these instructions
could lead to equipment malfunc-
tion and result in heavy smoke
emission, soot-up, hot gas puff-
back, fi re and asphyxiation hazards.
WARNING
!
Explosion and Fire Hazard
Startup/Checkout
After the 60 second recycle period, the control
will try to restart the system.
After the 15 second lockout time, the control
will lock out the burner and the reset button will
fl ash. Verify that the burner motor and igniter
are off and that the burner oil solenoid valve (if
used) is not energized.
Open the hand valve in the oil line.
Click the reset button and verify that the red light
in the reset button shuts off and that the burner
lights.
End the call for heat.
Before leaving the installation, verify that all thermo-
stat and boiler/furnace control wiring is correct. Con-
sult heating appliance manual for directions.
Set combustion with instruments
4.
5.
6.
7.
8.
○
Allow the burner to run for approximately 5 to 10
minutes.
Set the stack or over-fi re draft to the level specifi ed
by the appliance manufacturer.
Natural Draft Applications; typically over-fi re
draft is -0.01” or -0.02” w.c.
Direct V enting; typically may not require draft
adjustment.
High Eff ciency/Positive Pressure Appliances;
also vary from traditional appliances (see manu-
facturer’s recommendations).
Follow these four steps to properly adjust the burn-
er:
Step 1: Adjust the air shutter/band until a trace of
smoke is achieved.
Step 2: At the trace of smoke level, measure the
CO
2
(or O
2
) . This is the vital reference
point for further adjustments. Example:
13.5% CO
2
(2.6% O
2
)
Step 3: Increase the air to reduce the CO
2
by
1.5 to 2 percentage points. (O
2
will be in-
creased by approximately 2.0 to 2.7 per-
centage points.) Example: Reduce CO
2
from 13.5% to 11.5% (2.6% to 5.3% O
2
).
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2.
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3.
OIL-BURNING EQUIPMENT
SHALL BE CONNECTED TO
! ! CAUTION
FLUES HAVING SUFFICIENT DRAFT AT ALL TIMES
TO ENSURE SAFE AND PROPER OPERATION OF
THE BURNER.