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VII. System Start-Up
A. Verify that the venting, water piping, oil piping, and
electrical system are installed properly. Refer to
installation instructions contained in this manual.
B. Conrm all electrical, water and oil supplies are
turned off at the source and that the vent is clear from
obstructions.
WARNING
Completely read, understand and follow all
instructions in this manual before attempting
start up.
C. Fill entire heating system with water and vent air from
system. Use the following procedure on a Series Loop
or multi-zoned system installed as per Figure 8 or 9.
1. Close isolation valve in boiler supply piping.
2. Isolate all circuits by closing zone valves or
balancing valves.
3. Attach a hose to hose bib located just below
isolation valve in boiler supply piping. (Note
- Terminate hose at a suitable oor drain or outdoor
area).
4. Starting with one circuit at a time, open zone valve
or valve.
5. Open hose bib.
6. Open ll valve (Make-up water line should be
located directly after isolation valve in boiler supply
piping between air scoop and expansion tank).
7. Allow water to ow into drain until discharge from
hose is bubble free for 30 seconds.
8. When zone is completely purged of air, close zone
valve or balancing valve. Open the zone valve for
the next zone to be purged. Repeat this step until
all zones have been purged. At completion, open all
zone valves or valves.
WARNING
The maximum operating pressure of this boiler is
30 psig. Never exceed this pressure. Do not plug
or change pressure relief valve.
9. Close hose bib, continue lling the system until the
pressure gauge reads 12 psig. Close ll valve.
(Note - If make-up water line is equipped with
pressure reducing valve, system will automatically
ll to 12 psig.
10. Open isolation valve in boiler supply piping.
11. Remove hose from hose bib.
D. CONFIRM that the boiler and system have no water
leaks.
E. CHECK CONTROLS, WIRING AND BURNER to
be sure that all connections are tight and burner is
rigid. Verify that all electrical connections have been
completed, fuses installed, that the oil tank is lled and
oil lines have been tested.
F. LUBRICATION. Follow instruction on burner and
circulator label to lubricate, if oil lubricated. Most
motors currently used on residential type burners
employ permanently lubricated bearings and thus do
not require any eld lubrication. Water lubricated
circulators do not need eld lubrication.
G. ADJUST CONTROL SETTINGS with burner service
switch turned “ON”.
1. SET ROOM THERMOSTAT about 10°F below
room temperature.
2. PRESS RED RESET BUTTON on R7184B Oil
Primary Control and release.
3. On BOILERS WITHOUT TANKLESS HEATERS
equipped with L7248 electronic aquastat controller,
set High Limit (HL) at 180°F. This temperature can
be varied to suit installation requirements. L7248
controller has the High Limit adjustment range
from 180°F to 240°F (82°C to 116°C). High Limit
Differential is xed at 15°F (8°C).
4. On BOILERS WITH TANKLESS HEATERS
equipped with L7224 electronic aquastat controller,
set operating control (low limit [LL]) at 190°F and
high limit (HL) at 210°F. Operating control (low
limit) setting must be a minimum of 20°F below
high limit setting.
L7224 controller has the High Limit adjustment
range from 130°F to 240°F (55°C to 116°C), and
the Low Limit adjustment range from 110°F to
220°F (43°C to 104°C). High Limit Differential is
xed at 10°F (6°C), and Low Limit Differential has
adjustment range from 10°F (6°C) to 25°F (14°C).
5. ADJUSTING AQUASTAT CONTROLLER
SETTINGS. To discourage unauthorized changing
of Aquastat settings, a procedure to enter the
ADJUSTMENT mode is required. To enter the
ADJUSTMENT mode, press the UP, DOWN, and
I buttons (refer to Figure 22) simultaneously for
three seconds. Press the I button until the feature
requiring adjustment is displayed:
• HL_ High Limit.
• LL_ Low Limit.
• Ldf Low Limit Differential.
• °F °C.