2
Maintenance
(continued)
29
Service Manual
Follow the Service and maintenance procedures given throughout this manual and in component literature
shipped with the boiler. Failure to perform the service and maintenance could result in damage to the boiler or
system. Failure to follow the directions in this manual and component literature could result in severe personal
injury, death, or substantial property damage.
The boiler should be inspected annually only by a qualified service technician. In addition, the maintenance
and care of the boiler designated in Table 2-1 and explained on the following pages must be performed to assure
maximum boiler efficiency and reliability. Failure to service and maintain the boiler and system could result in
equipment failure.
Electrical shock hazard – Turn off power to the boiler before any service operation on the boiler except as noted
otherwise in this instruction manual. Failure to turn off electrical power could result in electrical shock, causing
severe personal injury or death.
Address reported problems
1. Inspect any problems reported by the owner and correct
before proceeding.
Inspect boiler area
1. Verify that boiler area is free of any combustible materials,
gasoline and other flammable vapors and liquids.
2. Verify that air intake area is free of any of the contaminants
listed in Section 1 of the Knight Wall Mount Installation
and Operation Manual. If any of these are present in the
boiler intake air vicinity, they must be removed. If they
cannot be removed, reinstall the air and vent lines per
this manual and the Knight Wall Mount Installation and
Operation Manual.
Inspect boiler interior
1. Remove the top access cover and inspect the interior of the
boiler.
2. Vacuum any sediment from inside the boiler and
components. Remove any obstructions.
Eliminate all system or boiler leaks.
Continual fresh makeup water will reduce
boiler life. Minerals can build up in sections,
reducing heat transfer, overheating heat
exchanger, and causing heat exchanger
failure. Leaking water may also cause severe
property damage.
1. Inspect all water and gas piping and verify to be leak free.
2. Look for signs of leaking lines and correct any problems
found.
3. Check gas line using the procedure found in Section 7 - Gas
Connections of the Knight Wall Mount Installation and
Operation Manual.
Check all piping for leaks
WARNING
WARNING
WARNING
WARNING
Inspect condensate trap
Monthly inspection:
1. The condensate trap should be inspected monthly to
ensure the trap is properly installed and connected to the
condensate pipe under the boiler, see FIG. 2-1.
2. The condensate line should be inspected monthly for
obstructions, making sure it allows free flow for condensate
to drain.
3. Inspect the neutralizing kit (if installed) monthly to ensure
the condensate is draining properly, and there is still an
adequate amount of neutralizing agent available.
Annual cleaning:
1. The condensate trap should be cleaned at least once
annually, or at the end of each heating season, by removing
the bottom cap and cleaning out any sediment that exists.
2. The provided condensate trap is equipped with a ball that
acts as a seal against harmful flue gases escaping in case
there is no condensate in the trap. If this ball is not present,
flue gases may be able to pass through the trap when there is
no condensate present, resulting in an unsafe environment.
It is important to check and make sure the ball is still
located in the trap, acting as a seal against flue gases at least
once annually and after every cleaning.
It is in the best interest of the end user
to make sure the ball is present and the
condensate trap is filled with water during
all times of boiler operation to avoid flue
gas emission from the condensate drain
line. Failure to have the ball present or to
fill the trap could result in severe personal
injury or death.
WARNING
IMG00046
CONDENSATE DRAIN
FLOAT BALL
BOTTOM CAP
Figure 2-1 Condensate Trap
3. After the condensate trap is cleaned or serviced, it must be
checked to ensure that it is installed and draining properly.
Summary of Contents for WH 399
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