Excelsior DK4EXA075, Установка, эксплуатация и обслуживание

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do not install valve between boiler and
controls manifold. This would isolate safety
and controls from the boiler. A shut off
valve may be installed after the manifold to
facilitate LWCo probe removal.
DANGER
!
It is important to physically remove the probe from the
LWCO tapping annually and inspect that probe for ac-
cumulation of scale or sediment. Follow these steps
to inspect, clean and / or replace the probe:
Turn off electric service to the boiler controls.
1.
Drain boiler water to a level below the tapping for the
2.
probe.
Remove the low water cut-off control from the probe.
3.
Unscrew the probe from the LWCO tapping.
4.
Inspect that portion of the probe that is exposed to the
5.
water for a scale or sediment buildup.
Light deposits may be removed by wiping the probe
6.
with a damp cloth. Wiping the probe with a cloth
soaked in vinegar will remove more tenacious lime
deposits.
Clean the pipe threads of the probe to remove old,
7.
hardened pipe dope and other foreign matter.
Apply a moderate amount of good quality pipe dope
8.
to the pipe threads on the probe, leaving the two end
threads bare.
do not use PTFe (Teflon) tape.
Screw the probe into the LWCO tapping.
9.
Mount the low water cut-off control on the probe.
10.
Reconnect the control to probe wiring.
11.
Fill the system with water and purge.
12.
Add boiler water treatment compound as needed.
13.
Restore electric service to the boiler.
14.
Fire burner to bring the water in the boiler to a boil to
15.
drive off free oxygen.
WARNING – BEFORE RETURNING BOILER TO
16.
SERVICE: Follow the low water cut-off check out
procedure in the
Boiler start-up
section.
MAINTENANCE
BoiLeR And sysTeM CLeAninG insTRuCTions
FoR TRouBLe FRee oPeRATion
In a hot water heating system, the boiler and entire
1.
system (other than the expansion tank) must be full
of water for satisfactory operation. Water should be
added to the system until the boiler pressure gauge
registers 12 psi. To insure that the system is full, wa-
ter should come out of all air vents when opened.
Boiling Out of Boiler and System. The oil and grease
2.
which accumulate in a new hot water boiler can be
washed out in the following manner:
Ideally, shut off valves have been installed between A.
the boiler return manifold and the rest of the system,
to minimize the amount of system draining.
Drain the boiler to a level below the relief valve tapping. B.
Remove relief valve using extreme care to avoid C.
damaging it.
Add an appropriate amount of recommended boil out D.
compound.
Replace relief valve. E.
Fill the entire system with water and purge. F.
Start firing the boiler.
G.
Circulate the water through the entire system. H.
Vent the system, including the radiation. I.
Allow boiler water to reach operating temperature, if J.
possible.
Continue to circulate the water for a few hours. K.
Stop firing the boiler.
L.
Drain the system in a manner and to a location that M.
hot water can be discharged with safety.
Remove plugs from all available returns and wash N.
the water side of the boiler as thoroughly as pos-
sible, using a high-pressure water stream.
Refill the system with fresh water.
O.
Add Appropriate Boiler water treatment compounds
3.
as recommended by your qualified water treatment
company.
Testing the pH / Alkalinity After boiler and system
4.
have been cleaned and refilled as previously de
-
scribed, test the pH of the water in the system. This
can easily be done with a pH test kit. The pH should
be higher than 7 but lower than 11. Add appropriate
water treatment chemicals, if necessary, to bring the
pH within the specified range. With this lower level of
protection, care must be exercised to eliminate all of
the free oxygen in the system.
Boiler is now ready to be put into service.
5.