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SERIES 28HE BOILER INSTALLATION AND OPERATION INSTRUCTIONS
CAUTION: If the flue 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 flue 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 flue.
3. Replace the cleanout covers and fire the boiler for
at least 15 minutes.
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).
HI Limit
The aquastat high limit controls the maximum water
temperature in the boiler. It is adjustable from 140°F,
60
°
C
to 240°F,
116
°
C
. If the water temperature reaches
the set temperature before the demand for heat has
been met, the aquastat high limit should shut the boiler
off. The water temperature should never exceed the
maximum set point of 240°F,
116
°
C
. The aquastat high
limit cannot be repaired. If it fails to function properly
replace it.
Figure 25 - Recommended Overflow Trap Piping