Specifications

Part number 550-100-090/0809
109
g a s -f i r e d w a t e r b o i l e r — Boiler Manual
MAINTENANCE & SPECIFICATIONS
Maintenance
Cleaning the heat exchanger — pin
side when required
The boiler contains ceramic fiber materials.
Use care when handling these materials per
instructions on page 93 of this manual. Fail-
ure to comply could result in severe personal
injury.
Shut down boiler:1.
Follow “To Turn Off Gas to Appliance” instructions a.
on boiler and Lighting instructions.
Do not drain boiler unless it will be exposed to freez-b.
ing temperatures. If using freeze prevention fluid in
system, do not drain.
Allow time for boiler to cool to room temperature if it 2.
has been firing.
Remove jacket front door by removing two knurled 3.
head screws at lower front. Lift door away from boiler
to remove.
Follow the applicable procedures under 4. “Accessing
& cleaning exchanger: Ultra-80 and Ultra-105 Only,”
page 110 or “Accessing & cleaning exchanger: Ultra-155,
-230, 299 and -399 Only,” page 111.
Clean the cast aluminum heat exchanger
when required — water side
In order for the efficiency of boilers to increase beyond 1.
the condensing limit, new materials have been intro-
duced for the heat exchanger, including aluminum.
Aluminum has excellent heat transfer characteristics 2.
and is light in weight.
These new materials also require cleaning solutions 3.
that differ from those used in conventional cast iron
and steel boilers.
One common cleaning method that CANNOT
be used with systems containing aluminum is
a solution of trisodium phosphate, commonly
referred to as “TSP.”
The reason that trisodium phosphate cannot
be used is that the cleaning solution has a very
high pH level — while removing the scale in
the system, it also removes the natural pro-
tective oxide layer from the aluminum. The
oxide layer will reform, but if small amounts
of the trisodium phosphate remain in the
system, the chemical will continue to remove
the protective oxide layer, leading to reduced
heat exchanger life.
Use ONLY the cleaning product available from Weil-4.
McLain, Sentinel X400. See the Repair Parts section at
the end of this manual for ordering information.
General maintenance
Oil motor in system requiring regular oiling.1.
See Oiled bearing circulators for motor oiling procedures.2.
Oiled bearing circulators
The circulator shipped with the Ultra boiler is water-lubricated. 1.
No oiling is required.
Check other circulators in the system. Oil any circulators requiring 2.
oil, following circulator manufacturer’s instructions. Over-oiling
will damage the circulator.
Disconnect power
Electrical shock hazard — Disconnect all electrical
power to the boiler before attempting maintenance
procedures. Failure to complete could result in se-
vere personal injury, death or substantial property
damage.
Install boiler jacket front door after
startup or servicing
Reinstall boiler jacket front door after start-up or
servicing. The boiler front door must be securely
fastened to the boiler to prevent boiler from drawing
air from inside the boiler room. This is particularly
important if the boiler is located in the same room
as other appliances.
Inspect boiler jacket door gaskets. Gaskets must be
in good condition, with no tears or gaps. Replace if
necessary.
Failure to keep the door securely sealed and fastened
could result in severe personal injury or death.
Perform start-up and check/out
Removing and reinstalling components can change
boiler behavior. After any maintenance procedure,
you must prove the boiler is operating correctly. To
do so, follow the complete procedure for boiler and
system start-up, beginning on page 31. Failure to
comply could result in severe personal injury, death
or substantial property damage.