Freestyle 2 Series Manual page 81

FreeStyle
®
2
series
33 Startup — final checks
‰
Propane boilers — verify conversion
1. Verify boiler has been converted for propane. See page 10 for
FreeStyle
® 80, 120 or 155.
DO NOT attempt to mea-
sure gas valve outlet pres-
sure
DO NOT adjust or attempt to measure gas valve outlet
pressure. The gas valve is factory-set for the correct outlet
pressure. This setting is suitable for natural gas and propane,
requiring no field adjustment.
Attempting to alter or measure the gas valve outlet pressure
could result in damage to the valve, causing potential severe
personal injury, death or substantial property damage.
FreeStyle® boilers are shipped ready to fire natural gas
ONLY.
Failure to comply could result in severe personal injury,
death or substantial property damage.
‰
Check flame & combustion with instruments
1. Enter into the "TEST" Mode to check combustion on High
Fire and Low Fire.
2. To operate the boiler in test mode, press the CH "-" and
"+" keys together for 5 seconds (See Figure 104, page 79)
to activate the "TEST" mode.
3. The boiler lights at the maximum heating 100% rate displayed
on the LCD display.
4. The high fire (large) flame symbol will be displayed once the
boiler has lit.
5. Use DHW "_" button to drop firing rate to low fire.
6. To exit the "TEST" mode, press the CH keys (Items 3 and
4 Figure 80, page 62) together for 5 seconds, or leave the
boiler to automatically switch off after 15 minutes or stop-
ping DHW flow.
7. This TEST procedure is used to check/adjust combustion
CO and CO per specifications Figure 107, page 82 and
2
Figure 110, page 83.
8. Insert combustion analyzer probe
fittings/turn to remove (see Figure 43, page 33) from the flue
pipe and insert a combustion test probe.
9. Test for CO (or O ) and for CO. The CO
2 2
with Figure 107, page 82 or Figure 110, page 83. If results are
acceptable, proceed to step 7.
on page 82 to set the throttle screw position. See
below.
10. Measure natural gas input for High and Low Fire:
a. Operate boiler 10 minutes. Turn off other appliances.
b. At natural gas meter, measure time (in seconds) required
to use one cubic foot of gas.
Part number 550-142-950/0122
-
wall mount gas fired water boiler
— Remove the flue access
values must comply
2
, follow the instructions
IF NOT
WARNING
–
(continued)
If combustion at either high or low fire is
outside the range given in Figure 107, page 82
or Figure 110, page 83, follow the procedure
given on below, "Setting the Air/Gas Ratio
Valve" 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 Williamson-Thermoflo
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.
c. Calculate gas input:
3600 x 1000
number of seconds from step b
d. Btuh calculated should approximate input rating on boiler
rating label.
11. Use the FreeStyle® control display to navigate to Manual
Test mode (see Figure 104, page 79) and force the firing rate
to LOW (low fire). Push DHW "-" button only to drop to
low fire.
12. Look at the flame through the flame inspection window. The
low fire flame should be stable and evenly distributed over
burner surface with a uniform orange color.
13. If combustion testing in low fire meets the specification
range - Exit "TEST" Mode by pressing the CH "+" and "-"
keys together for 5 seconds.
14. Reinstall the flue access fittings, (see Figure 43, page 33) used
for combustion analyzer probe and lock it in closed position.
You must reinstall the flue access fittings to the flue
adapters, to prevent flue gas spillage from the vent
adapter test ports . Failure to comply could result in
severe personal injury, death or substantial property
damage.
Table 2
Gas rate Combi and Heating Only boilers.
Boiler
model
FS-80
FS-120
FS-155
boiler manual
= Btuh
Gas Rate (Natural Gas)
After 10 minutes from cold
Maximum rate Minimum rate
ft /h
3
78.4
117.6
151.9
ft /h
3
7.8
11.8
15.2
81