Robertshaw 300-206 - Manual

Your new Robertshaw thermostat has been designed to provide
accurate control and display of the room temperature. In addition, it
will also display all relevant information pertaining to your system.
The clearly marked buttons and informative display make it
extremely easy to understand and simple to use.
Please take a few moments to read the brief instructions and
familiarize yourself with the various functions in order to obtain
maximum benefit from this truly unique electronic control.
GENERAL INFORMATION
The thermostat normally displays room temperature, mode of
operation and whether cooling or heating is currently on. The
six buttons on the front of the unit allow complete control of
your equipment.
You may select different heating and cooling setpoints for the
system to maintain, e.g., 70° in heating and 75° in cooling.
Raising or lowering the setpoints in heating or cooling is as sim-
ple as pushing a button. In addition, you may choose to display
the temperature in °F or °C.
The thermostat also allows you to select continuous fan operation
(useful when using an air cleaner) or have the fan come on with
the equipment.
BUTTON FUNCTIONS
Outdoor Press to display the outdoor temperature (optional)
Mode Press to select cool only, heat only, auto (cool and
heat) or off
Fan Press for continuous fan or auto fan
Day/Night Press to alternate between day and night
temperature setpoints
USER CONTROLS
MODE
Select the desired mode of operation by repeatedly pressing the
MODE button.
COOLING

Controls the cooling system only. Select the temperature you
want while in the cooling mode by pressing and holding the
¨ or § buttons. The word COOL and the temperature setting is
displayed for 5 seconds.
HEATING

Controls the heating system only. Select the temperature you
want while in the heating mode by pressing and holding the
¨ or § buttons. The word HEAT and the temperature setting is
displayed for 5 seconds.
FAN 
The fan will come on automatically when the system is operating.
To select continuous fan operation, press the FAN button and the
display will show
 . This is recommended for electronic air
cleaners and continuous ventilation requirements.
OFF
To turn off the heating or cooling system, press the MODE button
until the word OFF appears on the LCD. Avoid using the OFF
mode during extremely cold weather to prevent damage to the
equipment from freezing.
USER CONTROLS (cont)
LIMITED OVERRIDE
When the keyboard is locked (switch #2 LOCKED), the user may
override the temperature setpoint for 1 hour by pressing either the
§ or ¨ button. The range of temperature override is ± 3° F or ±
3° C from the programmed daytime setpoint.
OUTDOOR BUTTON
If your thermostat has been installed with an electronic outdoor
remote sensor (Uni-Line Part #529), you may view the outdoor
temperature simply by pressing the OUTDOOR button. Upon
releasing the button, the thermostat will once again display the
indoor temperature. If the option is not connected, the thermostat
will display ---
(
.
DAY/NIGHT BUTTON
2©
When the thermostat is installed initially, the display will show the
2
symbol for your day temperature. By pressing the DAY/NIGHT
button you may select an alternate setback or night
©
temperature
(the thermostat will remember this setpoint). Simply press the
DAY/NIGHT button to alternate between temperature settings.
CELSIUS / FAHRENHEIT
Simultaneously press ¨ and § to switch between Celsius (C) and
Fahrenheit (F) temperature display.
REMOTE SENSOR (OPTION)
RS1 – RS2 – RS+V
The thermostat is designed to accept the electronic remote sen-
sor (Uni-Line Part #528) which will allow you to locate your ther-
mostat in an area away from view.
CLOCK TERMINALS (OPTION) CLK1 – CLK2
Your thermostat is equipped with remote clock terminals. By
connecting a remote clock timer, the thermostat can be alternat-
ed between the day and night (setback) temperature setpoints
automatically.
TEMPERATURE ACCURACY
Full temperature accuracy will only be realized after the thermo-
stat has been installed and powered for at least one (1) hour.
POWER FAILURES
Your thermostat employs the latest in solid state electronic
technology.
One of the unique features of your thermostat is that no battery is
required to maintain your selected setpoints in the event of a
power loss as the memory is unaffected by power failures of
any duration.
When power is restored, the thermostat will continue operating as
if the power had never been off.
INSTALLATION INSTRUCTIONS
LOCATION
To ensure proper operation, the thermostat should be mounted on
an inside wall in a frequently occupied area of the building. In
addition, its position must be at least 18" (46cm) from any outside
wall, and approximately 5' (1.5m) above the floor in a location
with freely circulating air of an average temperature. You should
avoid the following locations:
– behind doors or in corners where freely circulating air is
unavailable;
– where direct sunlight or radiant heat from appliances might
affect control operation;
– on an outside wall;
– adjacent to, or in line with, conditioned air discharge grilles,
stairwells, or outside doors;
– where its operation may be affected by steam or water pipes or
warm air stacks in an adjacent partition space, or by an area
behind the thermostat which is not climate controlled;
– where its operation will be affected by the supply air of an adja-
cent climate control HVAC device; and
– near sources of electrical interference such as arcing relay
contacts
CAUTION
THIS DEVICE SHOULD BE INSTALLED BY A
QUALIFIED TECHNICIAN WITH DUE REGARD
FOR SAFETY, AS IMPROPER INSTALLATION
COULD RESULT IN A HAZARDOUS CONDITION
Operating Instructions
Digital Heating/Cooling Thermostat
Model 300-206
111-135B