Weil-McLain 2 Series Manual page 89

®
SlimFit Series 2
Annual startup
Flue vent system and combustion air
piping
1. Visually inspect entire flue gas venting system (and air piping, if
installed) for blockage, deterioration or leakage. Repair any joints
that show signs of leakage in accordance with vent manufacturer's
instructions. When air is ducted to boiler, verify that air inlet pipe
is connected and properly sealed.
Failure to inspect for the above conditions and have
them repaired can result in severe personal injury or
death.
Check water system
1. Verify all system components are correctly installed and opera-
tional.
2. Check the cold fill pressure for the system. Verify it is correct
(usually around 12 psig).
3. Watch the system pressure as the boiler heats up (during testing)
to ensure pressure doesn't rise too high. Excessive pressure rise
indicates expansion tank sizing or performance problem.
4. Inspect automatic air vents and air separators. Remove air vent
caps and briefly press push valve to flush vent. Reinstall caps. Make
sure vents do not leak. Replace any leaking vents.
5. Check system water chemistry (inhibitor concentration, pH and
hardness). See page 79.
Check boiler relief valve
1. Inspect the relief valve and lift the lever to verify flow as in the following
warnings, excerpted from a relief valve manufacturer's warning label.
Before operating any relief valve, ensure that it is piped with
its discharge in a safe area to avoid severe scald potential. Read
manual section 3, page 12, before proceeding further.
2. If the relief valve weeps or will not seat properly, replace the relief
valve. Ensure that the reason for relief valve weeping is the valve
and not over-pressurization of the system due to expansion tank
waterlogging or under-sizing.
Safety relief valves should be reinspected AT LEAST
ONCE EVERY THREE YEARS, by a licensed plumb-
ing contractor or authorized inspection agency, to
ensure that the product has not been affected by cor-
rosive water conditions and to ensure that the valve
and discharge line have not been altered or tampered
with illegally. Certain naturally occurring conditions
may corrode the valve or its components over time,
rendering the valve inoperative. Such conditions are
not detectable unless the valve and its components
are physically removed and inspected. This inspection
must only be conducted by a plumbing contractor or
authorized inspection agency — not by the owner.
Failure to reinspect the boiler relief valve as directed
could result in unsafe pressure buildup, which can result
in severe personal injury, death or substantial property
damage.
Part number 550-100-180/0917
COMMERCIAL CONDENSING GAS
(continued)
- — Boiler Manual
FIRED WATER BOILER
Following installation, the valve lever must be operated
AT LEAST ONCE A YEAR to ensure that waterways
are clear. Certain naturally occurring mineral deposits
may adhere to the valve, rendering it inoperative. When
manually operating the lever, water will discharge and
precautions must be taken to avoid contact with hot
water and to avoid water damage. Before operating
lever, check to see that a discharge line is connected
to this valve directing the flow of hot water from the
valve to a proper place of disposal. Otherwise severe
personal injury may result. If no water flows, valve is
inoperative. Shut down boiler until a new relief v
has been installed.
Check expansion tank
1. Expansion tanks provide space for water to move in and out as the
heating system water expands due to temperature increase or con-
tracts as the water cools. Tanks may be open, closed or diaphragm
or bladder type. See section 3 of this manual for suggested best
location of expansion tanks and air eliminators.
Open-type — located above highest radiator or baseboard
unit, usually in the attic or closet. Has a gauge glass and over-
flow pipe to a drain.
Closed-type — welded gas tight and located above boiler.
Tank is partially filled with water, leaving an air cushion for
expansion.
Make sure this type of tank is fitted with a tank fitting,
such as the B & G Tank-Trol or Taco Taco-Trol. This fit-
ting reduces gravity circulation of air-saturated tank water
back to the system and prevents the air from bubbling up
through the water as it returns from the system.
Do not use automatic air vents in systems with closed-
type tanks. The air will escape from the system instead of
returning to the tank. Eventually, the tank will waterlog
and no longer control pressurization. The boiler relief
valve will weep frequently.
Diaphragm- or bladder-type
rubber membrane to separate the tank pressurizing air and
the water. May be located at any point in the system, but most
often found near the boiler.
Systems with this type of expansion tank require at least
one automatic air vent, preferably located on top of an air
eliminator, as shown in examples in this manual.
2. If relief valve has tended to weep frequently, the expansion tank
may be waterlogged or undersized.
Closed-type tank
a tank fitting if not already installed. Then check fill level per
fitting manufacturer's instructions. If fill level is correct, check
tank size against manufacturer's instructions. Replace with a
larger tank if necessary.
Diaphragm- or bladder-type
sure it is large enough for the system. If size is too small, add
additional tank (or tanks) as necessary to provide sufficient
expansion. If tank size is large enough, remove tank from sys-
tem and check charge pressure (usually 12 psig for residential
applications). If tank won't hold pressure, membrane has been
damaged. Replace tank.
— welded gas tight with a
— tank is most likely waterlogged. Install
— first, check tank size to be
alve
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