25
111079-01 - 12/20
FR
Installation & Service Manual
9. CAD CELL LOCATION AND SERVICE
The burner is supplied with a cadmium
sulfide flame detector mounted at the factory,
mounted on the bottom of the electronic
ignitor. See Figure 8-2. 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.
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.
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 8-3.
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 filters,
the 7505 can be placed in a purge
routine by:
See Figure 8-1 and Table 14-1 at the rear of
this manual.
4. ADJUST DRAFT REGULATOR for a draft of
-0.02” (water gauge) over the fire after chimney
has reached operating temperature and while
burner is running.
5. READJUST THE AIR DAMPER SETTING (Air
Band/Air Shutter) on the burner for a light
orange colored flame while the draft over the
fire is -0.02”. Use a smoke tester and adjust
air for minimum smoke (not to exceed #1) with
a minimum of excess air. Make final check
using suitable instrumentation to obtain a
CO
2
of 11.5 to 13% with draft of -0.02” (water
gauge) in fire box. These settings will assure
a safe and efficient operating condition. If the
flame appears stringy instead of a solid fire, try
another nozzle of the same type. Flame should
be solid and compact. After all adjustments
are made, recheck for a draft of -0.02” over the
fire.
6. ONLY READJUST THE HEAD SETTING
if
necessary.
a. Move the setting
forward or back one
position at a time to optimize the smoke and
CO
2
readings.
b. Steps outlined in Paragraph 5 and 6 above
must be repeated every time the Head or
Air Damper Setting is readjusted.
7. Turn “OFF” burner and remove Pressure
Gauge and Bleeder Valve Assembly. Install
pressure
port/bleeder plug and tighten. Start
burner again.
WARNING
DO NOT loosen or remove any oil line fittings
while burner is operating.
8. FLAME FAILURE
The FR boiler controls operate the burner
automatically. If for unknown reasons the
burner ceases to fire and the reset button on
the primary control has tripped, the burner
has experienced ignition failure. Refer to Oil
Primary Control features, Paragraph I, Step 2 of
this Section and Section XII, Troubleshooting,
Paragraph B. If the failure re-occurs, call your
heating contractor immediately before pressing
the reset button.
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.
8
System Start-Up
(continued)
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