Start The Boiler - Lochinvar 81 - 286 Installation And Operation Manual

10
Start-up
Final checks before starting the boiler
 Read the Knight Boiler Service Manual to familiarize
yourself with SMART SYSTEM control module
operation. Read this manual, page 58 for proper steps to
start boiler.
 Verify the boiler and system are full of water and all
system components are correctly set for operation.
 Verify the preparation procedures of Section 10, pages 55
and 56 have been completed.
 Fill the vent condensate trap with water (removing the
retaining screw in order to remove the 2 inch PVC cap
with the switch located at the top of the trap). Replace
the cap. Press the cap onto the trap until the cap makes
contact with the drain. Replace the retaining screw.
 Verify electrical connections are correct and securely
attached.
 Inspect vent piping and air piping for signs of deterioration
from corrosion, physical damage or sagging. Verify air
piping and vent piping are intact and correctly installed
per this manual.

Start the boiler

1. Read and follow the Operating instructions in FIG. 10-2,
page 58.
If boiler does not start correctly
1. Check for loose connections, blown fuse or service switch
off?
2. Is boiler water temperature 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 4 inches w.c.?
If none of the above corrects the problem, refer to the
Troubleshooting Section of the Knight Boiler Service Manual.
Check system and boiler
 Check water piping
1. Check system piping for leaks. If found, shut down
the boiler and repair immediately. (See WARNINGS
on pages 55 and 56 (startup) regarding failure to repair
leaks.)
2. Vent any remaining air from the system using manual
vents. Air in the system will interfere with circulation
and cause heat distribution problems and noise.
(continued)
Installation & Operation Manual
 Check vent piping and air piping
1. Check for gastight seal at every connection, seam of air
piping, and vent piping.
Venting system must be sealed gastight
WARNING
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 on page 46 of this manual (connecting gas supply
piping).
If you discover evidence of any gas leak,
WARNING
shut down the boiler at once.
leak source with a bubble test and repair
immediately. Do not start the boiler again
until corrected.
result in severe personal injury, death, or
substantial property damage.
 Propane boilers – verify conversion
1. Verify propane conversion has been completed per the
Propane Conversion instructions.
DO NOT adjust or attempt to measure
WARNING
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.
Knight boilers are typically shipped ready
WARNING
to fire on natural gas. Check boiler rating
plate to determine which fuel the boiler is set
for. If set to natural gas, it may be converted
to LP by installing an orifice (see page 13).
In order to operate on LP gas, an orifice
MUST BE installed. Failure to comply could
result in severe personal injury, death, or
substantial property damage.
Check flame and combustion
1. Turn the main power off to the boiler by placing the "On/
Off" switch in the OFF position.
2. Remove the flue temperature sensor from the flue pipe
connection. NOTE: Combustion measurements will be
made at this point.
3. Turn the main power on to the boiler by placing the "On/
Off" switch in the ON position.
Find the
Failure to comply could
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