25
110839-01 -8/20
AP-U
Installation & Service Manual
mounted on the bottom of the electronic ignitor.
See Figure 7-4. 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.
I. CHECK FOR CLEAN CUT OFF OF BURNER.
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.
Figure 7-4: Cad Cell Location
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.
J. 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.
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 7-5.
i.
The GeniSys 7505 is a microprocessor-
based control. The indicator light
provides diagnostic information for
Figure 7-5: GeniSys 7505 Oil Primary Terminals,
LED's and Reset Button
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 filters,
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 ransition 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.
• At the end of four (4) minutes, the
yellow light will turn off and the control
will automatically return to standby
mode.
7
System Start-Up
(continued)
!
Summary of Contents for AP-U AP-110U-N
Page 41: ...41 110839 01 8 20 AP U Installation Service Manual This page intentionally left blank...
Page 46: ...46 110839 01 8 20 AP U Installation Service Manual SERVICE RECORD SERVICE PERFORMED DATE...
Page 47: ...47 110839 01 8 20 AP U Installation Service Manual SERVICE RECORD SERVICE PERFORMED DATE...
Page 48: ...48 110839 01 8 20 AP U Installation Service Manual...
