28
111079-01 - 12/20
FR
Installation & Service Manual
3. CHECK OIL PRIMARY CONTROL
CAUTION
Due to the potential hazard of line voltage,
only a trained, experienced service technician
should perform the following safety checks.
This control contains no field-serviceable parts.
DO NOT attempt to take it apart. Replace entire
control if operation is not as described.
a.
Preliminary Steps
•
Check wiring connections and power
supply.
•
Make sure power is on to the controls.
•
Make sure limit control is closed.
•
Check contacts between ignitor and the
electrodes.
•
Check the oil pump pressure.
•
Check the piping to the oil tank.
•
Check the oil nozzle, oil supply and oil
filter.
b. Check Safety Features
Safe Start:
•
Place a jumper across cad cell terminals.
•
Follow procedure to turn on burner.
Burner must not start, indicator light turns
on and control remains in Idle Mode.
•
Remove jumper.
c. Simulate Ignition or Flame Failure:
•
Follow procedure to turn on burner.
•
Check cad cell resistance. If resistance
is below 1600 OHMS and burner runs
beyond safety cut-out time, cad cell is
good.
•
If safety switch shuts down burner and
resistance is above 1600 OHMS, open
line switch to boiler. Access cad cell
under ignitor, clean face of cad cell
and see that cell is securely in socket.
Check gasket around perimeter of ignitor
lid for proper seal. If gasket is missing or
damaged, replace gasket.
Room light can effect cad cell resistance.
Reset safety switch.
•
Close line switch to boiler. If burner
starts and runs beyond safety switch
cut-off time, cell is good. If not, install
new cell.
•
Close hand valve in oil supply line.
•
Failure occurs, device enters Recycle
Mode.
•
Device tries to restart system after
approximately 60 seconds.
•
After third Recycle Mode trial, safety
switch locks out within safety switch
timing indicated on label and control
enters Restricted Mode. Ignition and
motor stop and oil valves closes.
d. Power Failure Check: After Flame is
established, turn the power off to the
control/burner. The burner should shut
down safely. When power is restored a
normal ignition sequence should be started.
WARNING
Cad Cell Jumper must be removed after this
check.
4. CHECK HIGH LIMIT
a. Adjust system thermostat(s) to highest
setting.
b. Allow burner to run until boiler water
temperature exceeds high limit setting. The
burner should shut down and circulators
continue running.
c. Allow the temperature to drop below control
setting. The burner must restart.
d. Boiler installation is not considered
complete until this check has been made.
5. CHECK OPERATING CONTROL on boiler
applications equipped with tankless heater(s).
With burner off, draw hot water until burner
starts, then turn off hot water and check burner
shut-down.
J. IF CONTROLS MEET REQUIREMENT
outlined
in Paragraph I.
1. Allow boiler to operate for approximately 30
minute, confirm the boiler and system have no
leaks.
K. IF CONTROLS DO NOT MEET
REQUIREMENTS outlined in Paragraphs I-1
thru I-6, replace control and repeat checkout
procedures.
8
System Start-Up
(continued)
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