Slant/Fin EH-M2 - Manual (Page 9)

EH-M2-40 Boiler Operation and Installation Instructions 9
Appendix A
Thermostat Heat Anticipator Settings
Fixed anticipator thermostats are not adjustable. Adjustable anticipator thermostats, depending on thermostat model, may be adjustable
from a . 18 to a .9 setting by moving a pointer on the anticipator.
The higher the anticipator setting (towards .9) the longer it will take for the thermostat to respond to a change in room temperature. Too
high a setting and the boiler will be slow to respond to a temperature change in the room. This can cause the room temperature to drop to
an uncomfortable level before the boiler starts. This may generate homeowner complaints.
The lower the anticipator setting (toward .18) the faster the thermostat will respond to a change in room temperature. Too low a setting and
the boiler will short cycle. Boiler short cycling will cause unnecessary wear on the equipment and in the case of oil boilers it can lead to
poor combustion and more frequent cleaning of the combustion area.
It is important to understand what the thermostat is controlling and then determine the amp rating of that relay, gas valve, zone valve or
control. This information is usually stamped somewhere on the component. A properly set anticipator will allow the system to operate at its
maximum effectiveness.
Appendix B
Accumulation of foreign deposits in heat exchanger
Recent investigations of boilers which were installed in hard water areas, revealed that mineral deposits had accumulated in the heat
exchanger. In addition, sludge, scale and other solid contaminants were present in boilers installed in older systems or where the water
was supplied from a well. This accumulation creates an insulating layer that drastically may affect boiler efficiency.
THE TERMS OF THE BOILER WARRANTY WILL NOT APPLY TO FAILURES ENCOUNTERED UNDER THESE CIRCUMSTANCES.
RECOMMENDATIONS:
On all installations in hard water areas:
1. The system should be thoroughly inspected for leaks which must be repaired
however minor they may be.
2. The initial water charge of the system must be treated to reduce its hardness
to an acceptable level.
In addition to the aforementioned, older systems and those supplied from wells may require that a filter or strainer be incorporated in the
circuit at some point on the return line closest to the boiler. Suitable water treatment filters are commercially available for this purpose.
WE STRONGLY RECOMMEND THAT YOU CONVEY THIS VITAL INFORMATION TO ALL PARTIES CONCERNED.
Water Treatment
A good water treatment program will not only extend the useful life of this boiler but it will also save much of the time and expense of
repairs made necessary by preventable occurrences. A reputable water treatment company should be consulted to evaluate and determine
the best overall treatment program for your boiler equipment.
Appendix C
Replacement of Electric Heaters and gaskets
When replacing heating elements replace the gasket at the same time. It is not recommended to re-use an old gasket as it may have
become damaged or brittle. To prevent binding and leaks when installing a new gasket wet the gasket with water or coat it with talcum
powder to allow it to move into position properly without binding.
Appendix D
Use of Non-oxygen Diffusion Barrier Underfloor Tubing
The boiler warrenty does not cover leaks resulting from corrosion caused by the use of underfloor plastic tubing without an oxygen diffusion
barrier. Systems must have the non-oxygen diffusion barrier tubing separated from the boiler with a heat exchanger. Slant/Fin recommends
the use of underfloor plastic tubing with an oxygen diffusion barrier. Other systems components may also require protection from oxygen
permeation.