3
8) The boiler is shipped with a nozzle installed.
Check the nozzle and change it if a different
firing rate is desired. Connect burner to oil
s
upply. Refer to fuel unit manufacturer litera-
ture for piping, connections, lift and tank
installation.
9) Connect the electric supply to the boiler as
indicated on the wiring diagrams. The wiring
must be installed in accordance with the
National Electrical Code and any other state
and local codes.
10) One pipe oil supply line installations must be
absolutely air tight or loss of prime may
result. Maximum lift on one pipe installations
is about 8 feet. See burner literature for two
pipe installations. Install a shutoff valve and
oil filter in the oil supply line. Locate shutoff
valve close to tank with oil filter between
valve and burner.
Operational Sequence
1) Boilers with Tankless Coil - This boiler is
equipped with a combination aquastat con-
trol which has high and low limits to be set
at 180° and 160° respectively by the installer.
When room temperature falls below thermo-
stat setting, thermostat calls for heat starting
the burner and circulating pump. The burner
and pump continue to operate until room
heating requirements are satisfied (thermo-
stat setting is reached), or until boiler water
temperature reaches the high limit control
temperature setting. If the high limit control
temperature setting is reached, the burner
shuts off and the circulating pump continues
to operate until the room heating require-
ments are satisfied. If the thermostat contin-
ues to call for heat after the boiler water
temperature has dropped below the temper-
ature setting of the high limit control, the oil
burner will start again, while the circulating
pump will continue to run. The boiler water
temperature is normally maintained at 160°F
around the tankless coil by the operating
control so that an abundance of hot water is
available. If the boiler water temperature
should fall below the operating control set-
ting (160°F) the oil burner will be started
again by that control (and the circulating
pump will be prevented from operating) until
the operating control setting is satisfied. See
control manufacturers literature included in
the data package for detailed wiring, operat-
ing and safety instructions.
2) Boilers Less Tankless Coil. This boiler is
equipped with a combination aquastat con-
t
rol which has high and low limits to be set
at 180° and 120° respectively by the installer.
The control acts exactly as described for a
boiler with a tankless coil except that the low
limit is set lower since the boiler does not
need to be kept hot to provide heat to the
domestic hot water coil. By maintaining the
boiler at or above 120° the system will
remain warm enough to avoid cycles of hot
and cold that can produce condensation
which can cause deterioration of the boiler
heat exchanger.
3) A cadmium sulfide flame scanner (cad cell)
and relay are provided with the oil burner.
The cad cell will stop the oil burner within a
predetermined number of seconds if the fuel
fails to ignite or if the flame goes out during
operation. The oil burner will remain off until
the red reset button on the relay has been
pushed. RESET MUST NEVER BE
PRESSED MORE THAN ONCE DURING A
SINGLE FLAME FAILURE.
Start-Up and Check-Out Procedure
CAUTION
Only a trained, experienced serviceman should
attempt the checkout procedure outlined below.
Read the burner manufacturers instructions for
start-up for special instructions and special fea-
tures of the burner and control.
1) Combustion test equipment required for
proper burner adjustment:
a) CO
2
Analyzer
b) Draft Gauge
c) Oil Pressure Gauge 0-200 PSI
d) Stack Thermometer
e) Smoke Test Gun
f) Vacuum Gauge 0-30 in. of Hg
2) In order to take flue gas samples for com-
bustion testing a 1/4" hole must be drilled in
the flue pipe between the boiler and the
barometric draft regulator.
3) Open all shut-off valves in the oil supply line
to the burner.
4) Set thermostats substantially above room
temperature.
5) Check electrode settings and readjust air
setting if required. Electrode settings are
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