Safety Check For Control Systems; Protection From Freezing/Water Treatment; Keeping Area Clear - Slant/Fin SENTINEL SE-70 Installation And Operating Instructions Manual

12
JACKET TOP
FLUE COLLECTOR
BRUSH
Figure 13.
boiler water temperature to reach high limit control set-
ting. When this temperature is reached, the high limit
switch should open, and the main gas valve should
close automatically. If the high limit does not operate to
close the main gas valve, the valve, the high limit or the
wiring is faulty. Repair or replace immediately.
B. Gas valve safety shutdown test:
1. For boiler equipped with constant burning pilot, with
main burners firing, disconnect the thermocouple or
thermopile generator from the gas valve. The gas
valve should Immediately shut off the main burners
and the pilot.
2. For boilers equipped with Honeywell S8600 inter-
mittent pilot system, with main burners firing, discon-
nect the ignition cable from the S8600 IGNITOR BOX.
The gas valve should shut off the main burners.
C. Check for gas leaks from valve and gas piping to burn-
ers and pilot. If leaks are found, repair or replace as
required.
5. PROVIDING PROTECTION FROM FREEZING
A. Anti-freeze is sometimes used in hydronic heating
(FLUE COVER)
BOILER
CLEANING
The ceramic combustion chamber in the burner box contains
crystalline silica.
Wear proper dust mask and gloves when servicing combustion
chamber of burners.
Crystallilne silica has been identified as a carcinogenic or possibly
carcinogenic to humans.
systems to protect against freeze-up in the event of
power failure or control shutdown when the building is
unoccupied. It should be recognized that unless the
building is kept above freezing temperature by some
means, the plumbing system is not protected.
Two types of anti-freeze may be used: ETHYLENE GLY-
COL, has desirable properties, but is toxic. Its use may
be prohibited when system water/glycol solution is in
contact with a potable water vessel (as with a tankless
heater). PROPYLENE GLYCOL is used in the quick-
freeze food industry; it is practically non-toxic. Its use
may be permitted when tankless heaters are used. When
anti-freeze must be used, inhibited propylene glycol is
recommended. Useful information on the characteristics,
mixing proportions, etc. of glycol in heating systems is
given in Technical Topics No. 2A, available from the
Hydronics Institute 34 Russo Place, Berkeley Heights,
NJ 07922. Consult glycol manufacturers for sources of
propylene glycol.
B. Water Treatment:
A good water treatment program will not only extend the
useful life of this boiler but it will also save much of the
time and expense of repairs made necessary by pre-
ventable occurrences.
A reputable water treatment company should be con-
sulted to evaluate and determine the best overall treat-
ment program for your boiler equipment.
6. KEEP THE BOILER AREA CLEAR AND FREE FROM
COMBUSTIBLE MATERIALS, GASOLINE, AND OTHER
FLAMMABLE VAPORS AND LIQUIDS.
WARNING:
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