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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
. CONFIRM all electrical, water and oil supplies are
turned off at the source and that the vent is clear from
obstructions.
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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 10 or 11.
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 floor drain or outdoor
area).
4. Starting with one circuit at a time, open zone valve
or valve.
5. Open hose bib .
6. Open fill 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 flow 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.
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9. Close hose bib, continue filling the system until the
pressure gauge reads 12 psig. Close fill valve.
(Note - If make-up water line is equipped with
pressure reducing valve, system will automatically
fill to 12 psig.
10. Open isolation valve in boiler supply piping.
11. Remove hose from hose bib.
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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 filled and
oil lines have been tested.
F
. LUBRICATION. Follow instruction on burner and
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circulator label to lubricate, if oil lubricated. Most
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motors currently used on residential type burners
employ permanently lubricated bearings and thus do
not require any field lubrication. Water lubricated
circulators do not need field lubrication.
G.
ADJUST CONTROLS SETTINGS with burner service
switch turned "ON".
1. SET ROOM THERMOSTAT about 10°F below
room temperature.
2. PRESS RED RESET BUTTON on front of
burner cover (Beckett, Riello burners) hold button
for one (1) second and release to reset primary
control.
3. On WATER 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 fixed at 15°F
(8°C).
4. On WATER 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 fixed at
10°F (6°C), and Low Limit Differential has
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adjustment range from 10°F (6°C) to 25°F (14°C).
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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 19) simultaneously for
three seconds. Press the I button until the feature
requiring adjustment is displayed:
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