Appendix B, C & D - Slant/Fin INTREPID TRDV-30-0.85 Installation And Operation Instructions Manual

14
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.
Recent investigations of boilers which were installed in hard
water areas, revealed that mineral deposits had accumulated
at the bottom of 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 ( observed to be 2 - 2-1/2" or more )
creates an insulating layer that drastically affects boiler
efficiency by reducing the transmission of heat through this
primary transfer surface and causes extreme metal
temperatures that eventually crack heat exchanger.
Note: DOMESTIC TANKLESS HOT WATER COILS ARE HIGHLY
SUSCEPTIBLE TO THIS CONTAMINATION
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 repairedhowever minor they may be.
The boiler warranty 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
APPENDIX B
Thermostat Heat Anticapator Settings
APPENDIX C
APPENDIX D
Use of non-oxygen diffusion barrier underfloor tubing
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.
2. The initial water charge of the system must be treated to
reduce its hardness to an acceptable level.
3. Where a continuous fresh supply of hard water is fed to the
system as with process or steam boilers, it is essential that:
a) The feed water is treated to reduce the level of hardness to
a point where no significant deposition occurs in the boiler.
OR
b) The treated boiler water circulates through a closed circuit
heat exchanger which in turn will heat the distribution sys-
tem water.
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 com-
mercially available for this purpose.
WE STRONGLY RECOMMEND THAT YOU CONVEY THIS VITAL
INFORMATION TO ALL PARTIES CONCERNED.
with a heat exchanger, Slant/Fin recommends the use of
underfloor plastic tubing with an oxygen diffusion barrier.
Other system components may also require protection from
oxygen permeation.
INTREPID TRDV