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Installation & Operation Manual
47
10 Start-up (continued)
Final checks before starting the boiler
Read the Knight Wall Mount Service Manual to
familiarize yourself with SMART SYSTEM control
module operation. Read this manual, page 48 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
45 and 46 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 48.
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
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 Wall Mount 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 45 and 46 (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.
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 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 36 of this manual (connecting gas supply
piping).
If you discover evidence of any gas leak, shut
down the boiler at once. Find the leak source
with a bubble test and repair immediately.
Do not start the 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 conversion has been completed per the
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 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.
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.
ƽ WARNING
ƽ WARNING
ƽ WARNING
ƽ WARNING
Knight wall mount boilers are typically
shipped ready 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 11). 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.