Table of Contents
Advertisement
TR Series
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 tempera-
ture. 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 64 mm (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 the 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 with a heat exchanger, Slant/Fin
THERMOSTAT HEAT ANTICIPATOR SETTINGS
USE OF NON-OXYGEN DIFFUSION BARRIER UNDERFLOOR TUBING
SLANT/FIN LTD/LTEE, 6450 Northam Drive, Mississauga, On L4V 1H9
Phone: (905) 677-8400 / FAX: (905) 677-1829 Order Desk Fax: (905) 677-9015
www.slantfin.ca
APPENDIX B
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 C
WATER QUALITY
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 system water.
In addition to the aforementioned, older systems and those
supplied from wells may require that a filter or strainer be incorpo-
rated 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.
APPENDIX D
recommends the use of underfloor plastic tubing with an oxygen
diffusion barrier. Other system components may also require
protection from oxygen permeation.
E-mail: orderdesk@slantfin.ca info@slantfin.ca
16
Advertisement
Table of Contents
