Weil-McLain UO-3 CV manual Startup / Checkout, Startup/Checkout, Set combustion with instruments

Startup / Checkout

!WARNING Explosion and Fire Hazard

Failure to follow these instructions could lead to equipment malfunc- tion and result in heavy smoke emission, soot-up, hot gas puff- back, fire and asphyxiation hazards.

yDo 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.

yDo not attempt to re-establish flame with the burner running if the flame becomes extin- guished during start-up, venting, or adjustment.

yVapor-Filled Appliance: Allow the unit to cool off and all vapors to dissipate before attempting another start.

yOil-Flooded Appliance: Shut off the electrical power and the oil supply to the burner and then clear all accumulated oil before continuing.

yIf the condition still appears unsafe, contact the Fire Department. Carefully follow their directions.

yKeep a fire extinguisher nearby and ready for use.

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

1.Place a jumper across the cad cell terminals.

2.Refer to the steps for “Start up burner/set combustion” and have the system call for heat.

3.Burner must not start. Verify that the green light is on continuously and that the control remains in Standby mode.

4.End the call for heat and remove the cad cell jumper.

○Simulate Flame Failure and Ignition Failure

1.Refer to the steps for “Start up burner/set combustion” and have the system call for heat.

2.After flame is established and the burner igniter turns off, close the hand valve in the oil supply line.

3.At flame loss, the control will enter Recycle mode. Verify that the green light is flashing. The control will remain in Recycle for 60 seconds.

6104BAFG R0

Startup/Checkout

4.After the 60 second recycle period, the control will try to restart the system.

5.After the 15 second lockout time, the control will lock out the burner and the reset button will flash. Verify that the burner motor and igniter are off and that the burner oil solenoid valve (if used) is not energized.

6.Open the hand valve in the oil line.

7.Click the reset button and verify that the red light in the reset button shuts off and that the burner lights.

8.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

!CAUTION OIL-BURNING EQUIPMENT SHALL BE CONNECTED TO

FLUES HAVING SUFFICIENT DRAFT AT ALL TIMES TO ENSURE SAFE AND PROPER OPERATION OF THE BURNER.

1.Allow the burner to run for approximately 5 to 10 minutes.

2.Set the stack or over-fire draft to the level specified by the appliance manufacturer.

yNatural Draft Applications; typically over-fire draft is -0.01” or -0.02” w.c.

yDirect V enting; typically may not require draft adjustment.

yHigh Eff ciency/Positive Pressure Appliances; also vary from traditional appliances (see manu- facturer’s recommendations).

3.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 CO2 (or O2) . This is the vital reference point for further adjustments. Example: 13.5% CO2 (2.6% O2)

Step 3: Increase the air to reduce the CO2 by

1.5to 2 percentage points. (O2 will be in- creased by approximately 2.0 to 2.7 per- centage points.) Example: Reduce CO2 from 13.5% to 11.5% (2.6% to 5.3% O2).

Page 19