62
Installation & Operation Manual
10
Start-up
Check for gas leaks
Before starting the boiler, and during
initial operation, smell near the floor and
around the boiler for gas odorant or any
unusual odor. Remove the top access
panel and smell the interior of the boiler
enclosure. Do not proceed with startup
if there is any indication of a gas leak.
Use an approved leak detection solution.
Repair any leaks at once.
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 field 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.
Propane boilers only – Your propane
supplier mixes an odorant with the propane
to make its presence detectable. In some
instances, the odorant can fade, and the
gas may no longer have an odor. Before
startup (and periodically thereafter), have
the propane supplier verify the correct
odorant level in the gas.
Check thermostat circuit(s)
1. Disconnect the two external wires connected to each
of the heat/loop demand terminals on the connection
board.
2. Connect a voltmeter across these two incoming wires.
Close each thermostat, zone valve, and relay in the
external circuit one at a time and check the voltmeter
reading across the incoming wires.
3. There should NEVER be a voltage reading.
4. If a voltage does occur under any condition, check and
correct the external wiring. (This is a common problem
when using 3-wire zone valves.)
5. Once the external thermostat circuit wiring is checked
and corrected if necessary, reconnect the external
thermostat circuit wires to the connection board.
Inspect condensate system
Inspect/check condensate lines and fittings
1. Inspect the condensate drain line, condensate fittings
and condensate trap to ensure the trap is properly
installed and connected to the condensate pipe under
the boiler. Reference
Section 9: Condensate Disposal
for
installation instructions.
WARNING
WARNING
WARNING
Final checks before starting the boiler
Read the Knight Wall Hung Fire Tube Boiler Service
Manual to familiarize yourself with SMART SYSTEM
control module operation. Read this manual, pages 66 and
67 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 60
thru 63 have been completed.
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.'s 10-2
and 10-3, pages 66 and 67.
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 Wall Hung Fire Tube
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
60 thru 63 (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.
