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S
4
®
ERIES
Startup — fi nal checks
To start the boiler
1. Turn OFF the boiler ON/OFF switch.
2. Re a d a n d f o l l ow t h e O p e r a t i n g In s t r u c t i o n s ,
Figure 38, page 39 .
3. The U-Control display will show installed sensors when fi rst
powered. Make sure the right sensors are detected. If not,
determine the cause and correct before proceeding.
If boiler does not start correctly
1. Check for loose connections, blown fuse or service switch
off?
2. Is external limit control (if used) open? Is boiler water tem-
perature above 200 °F?
3. Is thermostat set below room temperature?
4. Is gas turned on at meter or boiler?
5. Is incoming gas pressure less than 5" w.c. for natural gas or
4" w.c. for propane?
6. Are parameters set correctly in this manual?
7. Is the warm weather shutdown activated?
8. If none of the above corrects the problem, refer to Trouble-
shooting, beginning on page 115 .
❏
Check system and boiler
❏
Check water piping
9. Check system piping for leaks. If found, shut down boiler
and repair immediately. (See WARNING on page 35 regard-
ing failure to repair leaks.)
10. 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
fl ue gas spillage and carbon monoxide emissions
which will result in severe personal injury or death.
38
-
GAS
FIRED WATER BOILER
— Boiler Manual
(continued)
❏
Check gas piping
1. Check around the boiler for gas odor following the proce-
dure of page 29 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 corrected. Failure to comply
could result in severe personal injury, death or
substantial property damage.
❏
Propane boilers — verify conversion
1. Verify propane orifi ce has been installed per Propane Con-
version instructions.
DO NOT adjust or attempt to measure gas
valve outlet pressure. The gas valve is factory-
set for the correct outlet pressure. This set-
ting is suitable for natural gas and propane,
requiring no fi eld 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.
Ultra boilers are shipped ready to fi re natu-
ral gas ONLY. Exception: The Ultra-80LP is
factory-equipped to fi re propane. You must
install the propane orifi ce if the boiler will be
connected to propane. See page 48 .
Failure to comply could result in severe per-
sonal injury, death or substantial property
damage.
Part number 550-100-400/0717
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