Lochinvar Kight XL 400-801 - Manual (Page 35)

35
7
Start-up
(continued)
Final checks before starting the boiler
 Read the Outdoor Knight XL Service Manual to
familiarize yourself with SMART SYSTEM control
module operation. Read this manual, page 33 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 7, pages 33
and 34 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.
Start the boiler
1. Read and follow the Operating instructions in FIG. 7-2,
page 36.
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 (93°C)?
3. Is thermostat set below controlling sensor temperature?
4. Is gas turned on at meter or boiler?
5. Is incoming gas pressure less than 4 inches w.c. (.99 kPa)?
If none of the above corrects the problem, refer to the
Troubleshooting Section of the Outdoor Knight XL 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 33 and 34 (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 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,
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 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 fi
eld adjustment. Attempting to
alter the gas valve outlet pressure could
result in damage to the valve, causing
potential severe personal injury, death, or
substantial property damage.
Check fl ame and combustion
1. Turn the main power off to the boiler by placing the
“On/Off” switch in the OFF position.
2. Combustion measurements will be made from exhaust
opening.
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 Outdoor Knight XL boilers are typically
shipped ready to fi re 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 orifi ce or by making a gas
valve adjustment (see page 12). In order
to operate on LP gas, an orifi ce MUST
BE installed or a gas valve adjustment
MUST BE made. Failure to comply could
result in severe personal injury, death, or
substantial property damage.
Outdoor Knight XL Installation & Operation Manual