Boiler Checking & Adjustment - Smith 28HE Series Installation & Operating Instructions Manual

SERIES 28HE STEAM BOILER INSTALLATION AND OPERATION INSTRUCTIONS
Page 20
CAUTION: If the fl ue gas temperature exiting the
smoke hood is less than 320°F, 160°C at full rated
input, the number of heat transfer rods in the boiler
must be reduced. Failure to protect the boiler from
low fl ue gas temperatures will shorten the life of the
boiler and breeching and void the warranty!
Flue Temperature Adjustment
1. Shut the boiler off and remove the left side jacket
panels and cleanout covers, Figure 8.
2. Remove the bottom heat transfer rod from each fl ue.
3. Replace the cleanout covers and fi re the boiler for
at least 15 minutes.
Figure 25 - Recommended Overfl ow Trap Piping
4. Check the flue temperature. If it's greater than
320°F, 160°C, reseal the cleanout covers and install
the left side jacket panels.
5. If the flue temperature is still less than 320°F,
160°C, repeat steps 1 through 4.
BOILER CHECKING & ADJUSTMENT
CAUTION: Never increase the input to the boiler
above that for which it is rated. Doing so can cause
premature failure of the boiler!
Low Water Cutoff
Ensure that the low water cutoff device(s) function(s)
properly. Test in accordance with the manufacturer's
instructions included with the device(s).