Weil-McLain ULTRA ULTRA-105 Service Manual page 35

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GAS FIRED WATER BOILER SERIES
Boiler maintenance procedure
Perform ALL of the (
(You must have the correct maintenance kit to proceed. See page 33 for details.)
Order Procedure
Clean the burner.
5
Replace combustion
6
chamber cover plate
insulation and gaskets.
Clean the heat exchanger
7
heating surface.
8 Remove, clean and re-
install condensate trap.
Part number 550-100-029/0810
—
1 & 2
14
) procedures listed in the following, in the ORDER SHOWN.
Description
See Figure 20, page 37 for burner access and assembly.
Remove the burner retaining hardware and remove burner from cover plate.
Brush the exterior of the burner with a nylon-bristle brush (DO NOT use a wire brush).
Use a vacuum cleaner or compressed air to clean the interior of the burner. When using compressed air,
wear protective eye gear. Compressed air should only be used when cleaning the burner outdoors.
Reassemble the burner to the cover plate (see Figure 20, page 37).
Replace cover plate insulation and gaskets on cover plate.
Set aside until the heat exchanger has been cleaned as described below.
Use a vacuum cleaner to remove any accumulation
on the heating surfaces. Do not use any solvent.
If the vacuum cleaner is unable to clean completely,
wash the heating surfaces with clean, warm water.
If further cleaning is necessary, use the Heat ex-
changer cleaning tool (see illustration at right) or a
piece of 20-gauge or lighter sheet metal ¾" wide by
about 18 inches long to loosen deposits.
Slide the cleaning tool between the pins as shown,
from three directions. Continue until all sediment
on pins is removed.
After using the cleaning tool as shown, spray water
downward from above the pins to flush remaining
sediment.
Remove sediment from the bottom of the heat
exchanger.
Then disconnect the condensate line at the bottom
of the heat exchanger.
Loosen the hose clamps at both ends of the con-
densate line.
Remove the line and place a pan under the trap con-
nection.
Spray water into the bottom of the heat exchanger to flush remaining sediment to the condensate
outlet.
Spray water through the condensate line to clean it thoroughly.
Remove pan and re-install the condensate line.
NOTE: Series 1, Ultra-155 or Ultra-230 only — Examine plug seals. If there is evidence of weeping,
replace all plugs using Weil-McLain plug kit, part number 383-500-345.
If not already removed in the previous step, disconnect the condensate line at the bottom of the heat
exchanger.
Spray water through the condensate line to clean it thoroughly.
Fill with fresh water and re-install condensate line.
(continued)
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