Sussman SSB 12-18 Installation, Operation And Maintenance Manual - page 11
Installation, Operation & Maintenance Manual
11
Maintenance
HAZARD OF ELECTRIC SHOCK.
DISCONNECT ALL ELECTRICAL POWER BEFORE WORKING
ON BOILER.
S
ussman Electric Steam Boilers are designed for years of trou-
ble-free performance. To establish a good preventative mainte-
nance program, we suggest that the facility maintenance per-
son or engineer familiarize themselves with these simple rules.
1. Daily blowdown at pressure is essential for ideal boiler
performance. Extended periods of operation may require
more frequent blowdown. If the boiler is not equipped
with an automatic blowdown, in order to safeguard the
heating elements, it is recommended to turn both the main
disconnect switch and the boiler switch to the off position
before manually blowing down the boiler.
2. The sight glass should be checked frequently to assure the
boiler has adequate water.
3. The sight glass should be checked daily for damage (i.e.
scratches, erosion, leaks etc.) The sight glass should be
replaced if damaged. (See insert.)
4. A monthly inspection should be made of the internal wiring.
Open the access door and check all electrical connections
for tightness. Replace any wires that show signs of damage.
NOTE: The electrical power MUST be shut off during this
maintenance procedure.
7. Heating element mounting bolts should be checked and
tightened to a torque of 22 ft.-lbs. If there are indications
of steam leaks from an element, replace the element
gasket.
8. A monthly check for leaks should be made; any loose or
damaged fittings should be tightened or replaced.
9. Every four months the boiler float control should be checked
for proper operation. The lower equalization column can
be examined visually and manually to see if is clear and
clean. If there are signs of scale or mineral deposit buildup
the float control must be disassembled and cleaned.
One of the lower heating elements should be removed. If
scale or mineral deposits have begun to form all elements
should be removed cleaned and reinstalled using new
element gaskets.
Operating and high limit pressure control operation should
be checked. Pressure controls should be removed and
cleaned if necessary. Water feed supply check valves should
be inspected and replaced if necessary.
10. If the boiler is equipped with an electronic auxiliary low
water cut-off every four months the probe should be
removed and checked for deposits. The probe should be
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C A U T I O N
cleaned and reinstalled.
11. Replace probe every 10 years. More frequent
replacement of the probe is required if it is used
in locales where significant water treatment is
required.
12. Replace the auxiliary low water cut-off board
every 15 years.
13. Perform low water condition test every 12 months
and confirm auxiliary low water cut-off is
operating as intended.
AUXILIARY LOW WATER CUT-OFF TEST
1. To test the auxiliary low water cut-off,
simulate the failure of the primary low water
cutoff:
2. Turn off boiler power and control electric
supplies.
3. Drain boiler.
4. Close water feed supply valve.
5. Open Mercoid level control cover to access its
switches and terminal blocks.
6. Turn on boiler control voltage only.
7. Verify there is voltage at the yellow wire.
8. Manually work the upper switch to disable
pump.
9. Manually work the lower switch to engage
the heaters.
10. Pilot light near reset button will indicate low
water after 30 seconds.
11. Release the switches.
12. Open water feed supply valve.
13. Allow boiler to fill at proper level.
14. Push manual reset button to energize
contactors.
15. Install level control cover.