Boiler Maintenance - Smith Cast Iron Boilers 28HE Installation & Operating Instructions Manual

SERIES 28HE BOILER INSTALLATION AND OPERATION INSTRUCTIONS
Page 24

BOILER MAINTENANCE

WARNING: Servicing, inspection and adjustment
of the boiler must be done by a trained
technician in accordance with all applicable
local and national codes. Improper servicing or
adjustment can result in property damage,
severe personal injury or death!
The boiler should be cleaned and inspected once a year,
before each heating season.
Heat Exchanger Cleaning
A flue temperature over 550 F, 288 C , indicates that the
boiler needs to be cleaned.
1. Shut off the electrical power and the fuel supply to
the boiler.
2. Remove the left side jacket panels.
3. Remove the cleanout covers, Figure 8.
4. Remove the heat transfer rods, Figure 7, and clean
them with a wire brush if they're dirty.
5. Clean each flue passage with a wire brush.
6. If heavy deposits are present, pull the burner and
vacuum out the combustion chamber.
7. Vacuum out the burner base and clean and inspect
all of the components. Replace any damaged or
badly corroded parts.
8. Install the heat transfer rods in the correct order,
Figure 7.
9. Inspect the cleanout cover insulation and rope seal.
If damaged or deteriorated replace them.
10. Install the clean out covers and reseal them with a
silicone caulk rated for 500 F, 260 C .
11. Install the left jacket panels and remount the burner.
12. Restore electrical power and fuel to the boiler.
Vent System
Thoroughly inspect the vent system for any signs of
blockage, corrosion or leakage.
Immediately replace any unsound vent system piping.
Controls
1. Low water cutoff devices must be serviced per the
manufacture's instructions.
2. The relief valve should vent water when the test
lever is lifted. It should not weep or discharge water
at normal system pressure.
WARNING: Never try to clean or repair the relief
valve! If the valve fails to operate properly,
replace it! Failure to comply with this warning
can result in an explosion causing extensive
property damage, severe personal injury or
death!
3. Use a combustion analyzer to ensure that the
burner is adjusted properly, see BOILER
OPERATION.