18
THERMOSTAT OPERATION
The following section (pages 19 to 27) highlights important information about operating and maintaining your sys-
tem. It contains information on using your thermostat, homeowner maintenance including a recommended sched-
ule, and troubleshooting. If you can’t fi nd the answer to your question here, contact your WaterFurnace dealer.
General Thermostat Information
The main control (or interface) between you and your WaterFurnace unit is the thermostat. Page 19 shows the
more common thermostats used. However, other thermostats are available. To fi nd the specifi c instructions for your
thermostat, refer to page 19. Due to space limitations, some thermostat information may not be listed in this manual.
Each thermostat comes with its own instruction guide for additional information.
Electronic thermostats are widely used in today’s heating and cooling systems, replacing old electro-mechanical
models containing mercury. In addition to providing more precise temperature control, electronic thermostats can
also include many more features and options, along with a more aesthetically-pleasing look. Although these thermo-
stats are signifi cantly more high tech, you’ll fi nd that they are easy to operate.
Note: Most thermostats have an automatic minimum tempera-
ture separation (in degrees) from the heating setpoint to the
cooling setpoint. This is necessary so the unit cannot continu-
ously switch back and forth between heating and cooling when
the thermostat is set in the automatic changeover mode. This
separation is called the “dead band”, and is usually 2 degrees
F. For example, if you place your cooling setpoint at 72, your
heating setpoint cannot be higher than 70. If you would then
increase your heating setpoint from 70 to 72, your cooling
setpoint would automatically increase by that same 2 degrees
to 74.
Your electronic thermostat is designed to provide precise comfort. To
get the best comfort from your system it is recommended that you
resist the temptation to frequently adjust the thermostat. Simply fi nd
a comfortable setting for heating and cooling, and let the system do
the rest to provide you with many years of energy savings without
sacrifi cing comfort. Most homeowners prefer setpoints in heating
from 70 to 72, and from 73 to 75 during cooling.
THERMOSTAT OPERATION