Weil-McLain SlimFit 2 Series Manual page 83

SlimFit ® Series 2
Startup procedure
If combustion at either high or low fire is out-
side the range given in Figure 75, follow the
procedure given for adjusting the throttle
screw on the gas valve. 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 qualified technician, using calibrated
test instruments. Failure to comply could
result in severe personal injury, death or
substantial property damage.
Figure 75
Acceptable CO
High fire
Boiler
%CO CO
2
ppm
Note 1
SF1000 9 00 < 60
SF1500 9 00 < 60
SF2000 9 00 < 60
The high fire CO
Note 1 may vary with conditions, but must not be
lower than 8.5% nor higher than 10.0%.
The low fire CO
may vary with conditions, but must not be
Note 2
higher than the high fire CO
0.5% less than the high fire CO
Figure 76
Gas valve adjustment locations
for use by a qualified technician,
using calibrated combustion test
instruments)
Throttle screw
adjustment (high fire)
Offset adjustment
(low fire)
Part number 550-100-561/0224
commercial condensing gas
(continued)
and CO values
2
Low fire
%CO CO
2
ppm
Note 2
8 75 < 60
8 75 < 60
8 75 < 60
listed is typical. The value
2
listed is typical. The value
2
nor more than
2
.
2
(ONLY
Solenoid indicator
lights (V1 & V2)
- — Boiler Manual
fired water boiler
5. Use a T40 Torx driver to adjust the setting. Rotate clockwise to increase
CO , rotate counterclockwise to decrease CO
2
screw when completed.
6. Consult your local Weil-McLain representative if acceptable results
cannot be obtained for both high and low fire.
Adjust and test boiler controls
1. Follow instructions in this manual to set and verify operation of the
boiler controls.
Check ignition system safety shutoff device
1. After the boiler has been installed, turn off the boiler.
2. Shut off the manual gas valve located on the gas line to stop flow
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 flash "Ignition Fault". It means that the
boiler tried to ignite without success for five (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.
Figure 77
Gas valve test pressure tapping
Use tapping P on gas valve body for pressure connection
after gas valve 1 or between the gas valve seats.
Gas valve leakage testing
DO NOT connect a manometer to the manual gas valve or
the automatic gas valve. The high vacuum from the blower
could pull fluid into the gas line, possibly damaging the gas
valves.
1. Refer to the gas valve manufacturer's instructions for the procedure
to test the valve.
2. To operate the two valve solenoids independently, navigate to the
Valve Test Screen on the Control (see Figure 57, page 65 for ac-
cess sequence).
3. When in the Gas Valve Test Screen, you will see two options:
a. Open Gas Valve 1
b. Open Gas Valve 2
4. To open only gas valve 1, highlight it and press enter/save.
. Re-install the cover
2
Use manual gas valve
side tapping for pressure
connection after gas valve 2.
83