Check System And Boiler - Weil-McLain Ultra Commercial Installation And Start-Up Manual

COMMERCIAL GAS
Startup — final checks

Check system and boiler

Check water piping
1. Check system piping for leaks. If found, shut down boiler and
repair immediately. (See WARNING on page 70 regarding failure
to repair leaks.)
2. Vent any remaining air from system using manual vents. Air in the
system will interfere with circulation and cause heat distribution
problems and noise.
Check vent piping and air piping
1. Check for gas-tight seal at every connection and seam of air piping
and vent piping.
Venting system must be sealed gas-tight to prevent flue
gas spillage and carbon monoxide emissions which will
result in severe personal injury or death.
Check gas piping
1. Check around the boiler for gas odor following the procedure of
page 49 of this manual.
If you discover evidence of any gas leak, shut down the
boiler at once. Find the leak source with bubble test and
repair immediately. Do not start boiler again until cor-
rected. Failure to comply could result in severe personal
injury, death or substantial property damage.
Propane boilers — verify conversion
1. Verify propane orifice has been installed per Propane Conversion
instructions.
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 adjust-
ment. 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.
Ultra boilers are shipped ready to fire natural gas
ONLY. You must install the propane orifice if the
boiler will be connected to propane. See page 9.
Failure to comply could result in severe personal
injury, death or substantial property damage.
Part number 550-100-086/0809
-
FIRED WATER BOILER
(continued)
— Boiler Manual
Check flame & combustion with
instruments
1. Initiate a call for heat on one of the heat demand in-
puts.
2. Access the U-Control installer menus by pressing and
holding the UP and DOWN arrow keys for five sec-
onds.
3. Use the U-Control display to navigate to Manual test
mode (see Figure 65, page 63) and force the firing rate
to MAX (high fire).
4. Look at the flame through the flame inspection win-
dow. The high fire flame should be blue and should
be stable. The burner surface should be covered with
orange dots.
5. Remove the flue temperature sensor from the flue pipe
and insert a combustion test probe., using a calibrated
combustion test instrument.
6. Test for CO (or O
2
be within 1% of the values listed in Figure 68. If results
are acceptable, proceed to step 7. IF NOT, follow the
instructions under "Gas valve adjustment procedure" on
page 74 to set the CO
If combustion at either high or low fire is
outside the range given in Figure 68, fol-
low 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 represen-
tative. 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.
Acceptable CO
must be within 1.0% of these values)
550
750
These values are for altitudes up to 5,500 feet. For higher
altitudes, CO may be slightly lower and CO slightly higher.
2
) and for CO. The CO values must
2 2
values. See WARNING below.
2
and CO values (CO
2
2 2
2
73