Check Flame Signal; Check Burner Flame; Check Flue Gas Temperature; Review With Owner - Weil-McLain -105 Manual

8a
Annual startup
Perform startup and checks
1. Start boiler and perform checks and tests specified
on pages 23 through 26 (and Control Supplement).
2. Verify cold fill pressure is correct and that operating
pressure does not go too high.
3. Complete the check-out procedure on page 26.

Check burner flame

The boiler contains ceramic fiber materials.
Use care when handling these materials per
instructions on page 29 of this manual.
Failure to comply could result in severe
personal injury.
1. Inspect flame through observation window using the
procedure on page 25.
2. If flame is unsatisfactory at either high fire or low fire,
turn off boiler and allow boiler to cool down. Then remove
burner and clean it thoroughly using a vacuum cleaner or
compressed air. Do not use compressed air to clean burner
if performed inside a building.
3. To access burner, remove the heat exchanger cover plate
following the procedure on page 33.
4. When replacing burner, ensure gasket is in good condition
and correctly positioned. After tightening the three retainer
screws, bend up the retainer tabs as shown in Figure 16 to
prevent screw rotation.
5. After servicing, replace boiler components. Retest boiler.
Figure 16 Burner assembly
32
-
GAS FIRED WATER BOILER SERIES
(continued)

Check flame signal

1. Flame signal (DC volts from low voltage terminal strip terminal 9 to ground)
2. A lower flame signal may indicate a fouled ignitor or damaged ignitor insulation.
3. See Troubleshooting in the Ultra Control Supplement for other procedures to

Check flue gas temperature

1. Place the control display in Information mode while the boiler is operating at
2. The flue gas temperature (electronic display first digit shows "5") must not be
3. If the flue temperature is higher than this, shut down the boiler, allow to cool,

Review with owner

1. Review the User's Information Manual with the owner.
2. Emphasize the need to perform the maintenance schedule specified in the
3. Remind the owner of the need to call a licensed contractor should the
4. Remind the owner to follow the proper shutdown procedure and to
2 — Boiler Manual
should be at least 4 VDC.
If cleaning the ignitor does not improve, ground wiring is in good condition,
and ground continuity is satisfactory, replace the ignitor.
deal with low flame signal.
high fire. See Ultra Control Supplement for details.
more than 60°F higher than the return water temperature (display first digit
shows "2").
and follow the procedure on pages 33 through 34 to clean the heat exchanger.
User's Information Manual (and in this manual as well).
boiler or system exhibit any unusual behavior.
schedule an annual startup at the beginning of the next heating season.
Part number 550-100-026/0404