Weil-McLain Series 2 Manual page 85

® S
ERIES
Startup — fi nal checks
If combustion at either high or low fi re is
outside the range given in Figure 96, page 86 ,
follow the procedure given on page 84 or
page 86 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
representative. Throttle screw adjustment must
be done only by a qualifi ed technician, using
calibrated test instruments. Failure to comply
could result in severe personal injury, death or
substantial property damage.
Throttle screw adjustment
ECO 110 ONLY
DO NOT attempt to adjust the throttle screw
unless by a qualifi ed technician, and with the
use of calibrated combustion test instruments.
Adjust the throttle screw only as needed to meet
the combustion values given in Figure 96 .
1. Throttle screw adjustment is
elsewhere in this manual or if combustion tests indicate the
need, as explained under "❏ Check fl ame & combustion
with instruments," page 82.
2. Boiler behavior that might indicate a need to check
combustion values at high fi re (as per page 82 ) to verify
boiler is in adjustment include: diffi culty igniting, poor
fl ame stability at low fi re, combustion noise or high carbon
monoxide values.
3. Combustion readings must be taken at both high fi re and low
fi re. DO NOT attempt an adjustment of the throttle screw
at low fi re. Just check the combustion values.
4. See Figure 94 for location of the
Adjust the throttle screw in small movements.
5. See page 73 and Figure 84, page 74 . Make sure the Max fi ring
rate is set to the maximum given in the table. If not, adjust
as necessary. Then navigate to DIAGNOSTICS — Manual
test mode (see Figure 87, page 76 ) and force the fi ring
rate to HIGH (high fi re). After the boiler has had time to
stabilize, take a CO reading. If result is not acceptable, do
2
the following:
a. If the CO is HIGH, turn the throttle screw CLOCKWISE
2
to lower the input. Allow the boiler to stabilize and take
another reading. Continue until the desired CO
is achieved.
b. If the CO is LOW, turn the throttle screw
2
COUNTERCLOCKWISE to increase the input. Allow
the boiler to stabilize and take another reading. Continue
until the desired CO
6. Lock the boiler into low fi re. Check the combustion readings.
If results are acceptable at low fi re, verify high fi re readings
again. Restore fi ring rate to AUTO. DO NOT adjust throttle
on low fi re.
7. Consult your local Weil-McLain representative if acceptable
results cannot be obtained for both high and low fi re.
Part number 550-142-190/1218
2
-
G
AS FIRED WATER BOILER
if specifi ed
only necessary
ECO 110 throttle screw.
2
value is achieved.
2
— Boiler Manual
(continued)
Figure 94 ECO 110
by a qualifi ed technician, using calibrated
combustion test instruments)
Throttle adjustment screw
Re-check the Maximum and Minimum CO
CO rate
1. Turn off the boiler and then turn it back on and put in Test
Mode at maximum. Ensuring the CO
remained unchanged and confi rm that CO is within limits.
2. Reduce to minimum and re-check the minimum rate output
ensuring the CO
confi rm that CO is within limits.
3. In the event that the CO
contact your Weil-McLain representative.
4. Should you require any assistance during the set up procedure
contact your Weil-McLain representative if the problem
cannot be addressed with the information provided in this
manual.
❏ Check ignition system safety shutoff device
1. After the boiler has been installed, turn off the boiler.
value
2. Shut off the manual gas valve located on the gas line to stop
fl ow of fuel to the boiler.
3. Turn on the boiler. It will start the ignition sequence, but will
not light. After some time, the boiler will lockout, the display
screen will turn red, and the Control will fl ash "Ignition Fault".
It means that the boiler tried to ignite without success for fi ve
(5) times and went into Lockout mode. This means that the
ignition system safety device worked properly.
4. Clear the Lockout condition by selecting "Manual Reset" in
the Diagnostic Menu.
5. Open the manual gas valve located on the gas line to resume
fuel supply to the boiler.
Throttle screw (ONLY for use
Gas inlet
pressure
test port
setting level has
2
setting level has remained unchanged and
2
and CO cannot be obtained, please
2
and
2
85