SERIES 28A BOILER INSTALLATION AND OPERATION INSTRUCTIONS | Page 23 |
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 24 - Recommended Overflow Trap Piping
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 7.
4.Clean each flue passage with a wire brush.
5.If heavy deposits are present, pull the burner and vacuum out the combustion chamber.