STEP 1    Definitions

Interval:  The interval is the number of fifteen (15) minute periods that ThermGuard will wait between turning on the fan.

Duration: The duration is number of minutes that the fan will be turned on.

STEP 2   ThermGuard Familiarization
   
  On the ThermGuard there are the following items:
   
A red LED indicator labeled Duration.
A green LED indicator labeled Interval.
A programming button.
An ON/OFF switch.
Two wires coming from the top of the unit.

STEP 3   Turn on ThermGuard

bullet

Once ThermGuard is installed, turn the ON/OFF switch to the ON position.  ThermGuard will start by repeating the last programmed state.  It will first blink the green LED to represent the number of fifteen minute periods between turning on the fan.  This time period is also known as the interval.  It will then blink the red LED to represent the number of minutes that the fan will be on.  This time period is also known as the duration.

bullet

Once the program has been displayed as described above, ThermGuard will begin to time the number of fifteen minute periods last programmed, or interval.  When it has completed counting the interval, it will turn on your fan for the number of minutes, or duration, last programmed.  ThermGuard comes pre-programmed for an interval of two fifteen minute periods or ½ an hour and a duration of five minutes.  This means that when ThermGuard is first turned on, it will turn on your fan for five minutes every ½ hour.

 STEP 4   Changing the Program

bullet

To program press and hold the program until the green LED lights up (about 3 seconds).  This is your signal that ThermGuard is ready to accept the interval programming.  If you hold the button down too long and the red LED lights up, just release the button and wait about three seconds.  ThermGuard will restart by repeating the last program and be ready for another try.

bullet

Once the green LED lights up, release the button momentarily.  To program the interval you want ThermGuard to wait before turning on your heating system, simply press the button for the number of fifteen minute periods you want to wait. In other words, press the button four  times to set ThermGuard for a one-hour interval.  The maximum interval is 96 presses, or 24 hours.  Once you have tapped in the interval, release the button until the red LED lights up.  This is your signal that ThermGuard is ready to accept duration programming.

bullet

When the red LED lights up, tap in the number of minutes you would like ThermGuard to operate your fan.  The maximum duration is 24 taps, or 24 minutes.  When you have tapped the button for the desired duration, release the button and wait for ThermGuard to repeat your program back to you.

bullet

ThermGuard will repeat the program back to you by blinking the green and red LEDs to correspond with the number of fifteen minute periods and minutes you’ve chosen for your interval and duration.

STEP 5 Verify operation

bullet

Once ThermGuard has been installed and programmed, the proper operation can be verified without actually waiting for the interval to go by.

bullet

Turn the ON/OFF switch to the OFF position.

bullet

Press and hold the programming button while moving the ON/OFF switch to the ON position.  Then, release the programming button.

bullet

ThermGuard will repeat the last program by flashing the green and red LEDs to correspond with the interval and duration you’ve chosen.

bullet

The green LED will flash about once a second for a period of one minute.  After a minute, the red LED will flash once a second for a period of one minute. This indicates that you are in the special verification mode.  When the red LED is flashing, ThermGuard should be circulating hot water.

 

IMPORTANT

Verify that ThermGuard flashes the green and red LEDs for about one minute each and repeats this cycle.  If the green LED flashes for a minute and the red LED does not flash for a minute (it may flash for a short period of time), ThermGuard needs to be adjusted for your system.  Turn off ThermGuard and skip to step 6 to adjust ThermGuard’s settings to your system.

 

 

IMPORTANT

Go to your furnace and verify that there is no unusual rapid clicking noises that may be coming from the fan relay.  If there is a rapid clicking noise ThermGuard needs to be adjusted to your system.  Turn off ThermGuard and skip to step 6 to adjust ThermGuard’s settings to your system.

 

bullet

If the fan is operating and there are no rapid clicking noises in the from the furnace, then ThermGuard is working properly and you are done!  Congratulations, you have successfully installed your ThermGuard unit.

bullet

The last task is to ensure the existing thermostat functions properly.  Turn up the temperature on the thermostat and ensure the system operates.  When operation is verified, set the thermostat to the appropriate level for your home.  When the thermostat cycles your furnace, ThermGuard will re-initiate the interval countdown once the furnace is turned off.  In this way, ThermGuard will not turn on the fan if the furnace  has just been running.

STEP 6 ThermGuard adjustment to your system

This step is called “ThermGuard adjustment” and once ThermGuard is adjusted, it will not need to be adjusted againThermGuard will retain the setting even if power is removed from the unit.  This step is only required if ThermGuard is not operating properly with the factory settings and is usually only required when ThermGuard is connected to some high-impedance input electrical modules.

There are four configurable power settings for ThermGuard.  These steps will try each setting as required until proper operation is verified.

bullet

Turn ThermGuard ON/OFF switch OFF then ON.

bullet

Press and hold the programming button for about 6 seconds or until the RED (not green) LED lights up. 

bullet

Release the button and tap it two times.  This configures ThermGuard to the second power setting.

bullet

Release the button and wait for ThermGuard to repeat the last program by flashing the LEDs.

bullet

Repeat step 5 to verify operation.

bullet

If the operation is successful, you are done. 

bullet

If the operation fails turn the ThermGuard ON/OFF switch OFF then ON.

bullet

Press and hold the programming button for about 6 seconds or until the RED (not green) LED lights up. 

bullet

Release the button and tap it three times.  This configures ThermGuard to the third power setting.

bullet

Release the button and wait for ThermGuard to repeat the last program by flashing the LEDs.

bullet

Repeat step 5 to verify operation.

bullet

If the operation is successful, you are done. 

bullet

If the operation fails turn the ThermGuard ON/OFF switch OFF then ON.

bullet

Press and hold the programming button for about 6 seconds or until the RED (not green) LED lights up. 

bullet

Release the button and tap it four times.  This configures ThermGuard to the fourth power setting.

bullet

Release the button and wait for ThermGuard to repeat the last program by flashing the LEDs.

bullet

Repeat step 5 to verify operation.

bullet

If the operation is successful, you are done. 

bullet

If there is still a problem, please call the Bear Mountain Design customer support (406) 587-2478.

STEP 7 Choosing your Interval and Duration

Each home and situation is different and this information is presented as an example.  Bear Mountain Design has no way of knowing every situation and therefore created ThermGuard as a user programmable device.  ThermGuard comes with a default interval of 30 minutes and a default duration of five minutes.  If your home needs more heat distributed from your stove, you can decrease the interval to 15 minutes and increase the duration.

If at any time you wish to know the current interval and duration settings, momentarily press the programming button the ThermGuard will blink the LEDs corresponding to the current interval and duration.  ThermGuard will restart the interval timing in response to a button press.

Tips and Suggestions

Multiple unit synchronization

If multiple ThermGuard units are installed in one home, they can be synchronized so that the boiler is heated only once for multiple heating loops.  Simply switch all the units off and turn them all back on within a minute of each other.

This step may need to be repeated occasionally since each time one of the thermostats cycle, the ThermGuard attached to the thermostat will restart it’s timing cycle.

Send mail to webmaster@bearmountaindesign.com with questions or comments about this web site.
Last modified: 11/19/09