Weil-mclain ULTRA 230 Bedienungsanleitung PDF herunterladen (Seite 39)

Part number 550-100-029/0810

GAS-FIRED WATER BOILER SERIES 1 & 2 —

Control supplement & Service guide

Combustion testing and adjustment (continued)

Measure natural gas input:7.

Operate boiler 10 minutes.a.

Turn off other appliances.b.

At natural gas meter, measure time (in seconds) required to c.

use one cubic foot of gas.

Calculate gas input:d.

3600 x 1000

number of seconds from step c

= Btuh

Btuh calculated should approximate input rating on boiler e.

rating label.

Press and hold the Ultra control panel “Mode” and “-” buttons 8.

simultaneously until the display shows “L”.

The “L” in the ﬁrst digit means the boiler will operate at low ﬁre 9.

when the blower speed reaches minimum.

Look at the ﬂame through the ﬂame inspection window. The low 10.

ﬁre ﬂame should be stable and evenly distributed over burner

surface with a uniform orange color.

Test for CO11.

(or O

) and for CO. The CO

values must be within

1.0% of the values listed in Figure 24, page 40.

If results are acceptable, proceed to step .a.

IF NOT, follow the instructions under b. “Throttle screw adjust-

ment procedure”, page 40, to set the throttle screw position.

See WARNING below.

If combustion at either high or low ﬁre is outside

the range given in Figure 24, page 40, follow the

procedure given on page 40 for adjusting the throttle

screw on the venturi. If throttle screw adjustment

does not correct the problem, then shut down the

boiler and contact your local Weil-McLain repre-

sentative. Throttle screw adjustment must be done

only by a qualiﬁed technician, using calibrated test

instruments. Failure to comply could result in severe

personal injury, death or substantial property dam-

age.

If combustion test results at high ﬁre and low ﬁre are correct, press 12.

and hold the “+” and “-” buttons to return boiler to automatic

ﬁring.

Re-install the ﬂue gas temperature sensor. When inserting the 13.

sensor, remove the rubber grommet from the probe. Insert the

rubber grommet into the ﬂue pipe, then insert the probe into the

rubber grommet.

You must re-install the ﬂue gas temperature sensor to

prevent ﬂue gas spillage into the boiler enclosure. Failure

to comply could result in severe personal injury, death

or substantial property damage.

Re-install boiler jacket front door after servicing. The

boiler front door must be securely fastened to the boiler

to prevent boiler from drawing air from inside the boiler

room. This is particularly important if the boiler is lo-

cated in the same room as other appliances. Failure to

keep the door securely fastened could result in severe

personal injury or death.

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LOCATION/.,9FORUSEBYAQUALIlED

TECHNICIANUSINGCALIBRATEDCOMBUSTION

TESTINSTRUMENTS

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