Beckett 7505 - Manual (Page 11)

11 120v GeniSys Control Installation and Operation Manual
automatically return to standby mode.
If prime is not established during the
four minute pump prime mode, return
to step 5 to re-enter Pump Prime
mode. Repeat steps 5 through 7
until the pump is fully primed and the
oil is free of bubbles.
Terminate the call for heat, and the
control will resume normal operation.
Cad Cell Resistance Measurement
If the Beckett 7505 control is equipped
with the GeniSys Display Module, part
52067U, the cad cell resistance can be
selected and read on the LCD screen.
Also, the GeniSys Contractor Tool, part
52082U, can be used for this purpose.
If these are not available, the cad cell
leads can be unplugged from the control
and the resistance measured with a
meter in the conventional way.
Conduct these tests with fl ame present.
Flame Detection Range
Normal (0 - 1600 ohms)
Limited (1600 ohms to lockout)
Resetting From Restricted or
Hard Lockout
8.
9.
Maintenance
Oil heating systems require annual
service performed by a qualifi ed,
professional service agency. The 7505
primary control should be inspected
during this service routine according to
the following checklist:
NOTE: The 7505 control has no
serviceable internal parts. Do not
attempt to remove cover.
Inspect the exterior of the control.
Replace the control if there is any
sign of impact damage, water or
corrosion.
Use a multimeter to test the line
voltage at control L1 and L2. It
should be 102 - 132 Vac.
Inspect all external wiring for secure
connections and verify insulation
integrity.
Verify the control lockout and
operation sequence, (Reference
Startup/Checkout section).
Observe a full operating cycle to
prove the sequence and timings are
correct.
Replace any control that does not
meet listed specifi cations with an
equivalent replacement unit.
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Before starting or resetting the
control from restricted lockout
state, troubleshoot the heating
system for the root cause(s) of
the lockout.
Fire & Smoke
Hazard
Make necessary repairs or adjustment to
ensure a safe start condition.
Ensure that the appliance is free of oil and oil
vapors before starting or resetting the burner.
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to limit accumulation of unburned oil in
the combustion chamber.
To reset, hold the button down for 15
seconds until the red light turns off and
the yellow light turns on.
Always verify the control functions
according to all specifi cations before
leaving the installation site.
Replace the control if it does not
operate as specifi ed.
Disable Function
Any time the burner is running, press
and hold the reset button to disable the
burner. The burner will remain off as
long as the button is held.
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If the control continues to lock out
without a satisfi ed call for heat, or
fails the motor relay check, the control
enters Hard (restricted) Lockout in order ◦