Burnham V8 Series Instructions.pdf - Heating Help

• Close hand valve in oil supply line.• Failure occurs, device enters RecycleMode. Indicator light flashes at ¼ Hz rate2 seconds on, 2 seconds off).• Device tries to restart system afterapproximately 60 seconds.• After third Recycle Mode trial, safetyswitch locks out approximately within ssafety switch timing indicated on label andcontrol enter Restricted Mode. Indicatorlight flashes at 1 Hz rate (½ second on, ½second off). Ignition and motor stop andoil valves closes.• To reset from Restricted Mode: Press andhold the reset button for 30 seconds.When the LED flashes twice, the devicehas reset.iv. Cad Cell Check: See Figure 29.3. WARNING — Check High Limit Control —Jumper Thermostat Terminals. Allow burner tooperate until shut-down by limit. Installation is notconsidered complete until this check has been made.WARNINGJumper must be removed after this check.4. Check low water cut off control with water level atnormal water line (see Figure 1D). Raise thermostatsetting to allow burner to operate. Open boiler drainto allow water level to drop to bottom of sight glassuntil burner operation is shut-down by low watercut-off.Close boiler drain and refill to normal water line.Burner should automatically restart during fill.Lower thermostat setting.5. Check operating control on boiler equipped withtankless heaters. With burner off, draw hot wateruntil burner starts, then turn off hot water and checkburner shut-down.J. IF CONTROLS DO NOT MEETREQUIREMENTS outlined in Paragraph I., replacecontrol and repeat checkout procedures.Figure 29: Cad Cell Location• Perform cad cell resistance check asoutlined in control feature. Ifresistance is below 1600 OHMS andburner runs beyond safety cut-out time,cad cell is good.• If safety switch shuts down burner andresistance is above 1600 OHMS, open lineswitch to boiler. Access cad cell underignitor, clean face of cad cell and see thatcell is securely in socket. Check gasketaround perimeter of ignitor lid for properseal. If gasket is missing or damaged,replace gasket. Room light can effect cadcell resistance. Reset safety switch.• Close line switch to boiler. If burner startsand runs beyond safety switch cut-offtime, cell is good. If not, install new cell.v. Power Failure Check: After Flame isestablished, turn the power off to the control/burner. The burner should shut down safely.When power is restored a normal ignitionsequence should be started.51AQUASTAT SWITCHING ACTION WITHIN L8124CCONTROLThe switching action within the L8124C control hasthree settings:1. high limit2. low limit3. adjustable differentialHIGH LIMIT OPERATION —The high limit opens and turns off the burner when thewater temperature reaches the set point. The high limitautomatically resets after the water temperature drops pastthe set point and through the 10°F differential.Set the indicator at desired shut-off temperature.