Install Instructions

36
Figure 28: Cad Cell Location
V: SYSTEM START-UP (continued)
WARNING
DO NOT attempt to start the burner when excess
oil has accumulated, when the boiler is full of
vapor, or when the combustion chamber is very
hot.
10. Cad Cell Location and Service. The burner is
supplied with a cadmium sulde ame detector
mounted at the factory, mounted on the bottom of
the electronic ignitor. See Figure 28. To service cad
cell or to replace the plug in portion, swing open the
ignitor. After service is complete, be sure to fasten
down the ignitor.
H. CHECK FOR CLEAN CUT OFF OF
BURNER.
2. Verify Oil Primary Control features using
procedures outlined in Instructions furnished with
control or instructions as follows:
a. GeniSys 7505 Control Features, see Figure 29.
i. The GeniSys 7505 is a microprocessor-
based control. The indicator light provides
diagnostic information for lockout, recycling
and cad cell status. There is a manual reset
button to exit the Lockout Mode.
ii. Pump Priming Cycle: To facilitate purging
air from the oil lines and lters, the 7505 can
be placed in a purge routine by:
• After the burner starts, press and hold the
reset button for 15 seconds until the
yellow light turns on. This indicates that
the button has been held long enough.
• Release the reset button. The yellow
light will turn off and the burner will start
up again.
• At burner start up, click the reset button
while the igniter is till on. This will
transition the control to a dedicated
Pump Prime mode, during which the
motor, igniter, and valve are powered for
four (4) minutes. The yellow light will be
on.
Figure 29: GeniSys 7505 Oil Primary Terminals,
LED's and Reset Button
1. Air in the oil line between fuel unit and nozzle will
compress when burner is on and will expand when
burner stops, causing oil to squirt from nozzle at low
pressure as burner slows down and causing nozzle
to drip after burner stops. Usually cycling the burner
operation about 5 to 10 times will rid oil line of this
air.
2. If nozzle continues to drip, repeat Paragraph H,
Step 1 above. If this does not stop the dripping,
remove cut-off valve and seat, and wipe both with
a clean cloth until clean, then replace and readjust
oil pressure. If dripping or after burn persist replace
fuel pump.
I. TEST CONTROLS.
1. Check thermostat operation. Raise and lower
thermostat setting as required to start and stop
burner.
WARNING
Before installation of the boiler is considered
complete, the operation of all boiler controls must
be checked, particularly the primary control and
high limit control.