Frequently Asked Questions
Can't find the answer to your question? Contact your Local Representative for technical support.
-
How can I find the instruction manual for a tekmar control?
Each tekmar product has a three-digit product number. Most controls have the product number on the front; thermostats will have the three-digit product number inside the wiring area. If you are not sure, use this page to locate the product number of your control. Once you have your product numbe…
-
I have a tekmar boiler control installed and the building is too cool. How can I turn up the heat?
Boiler controls have a ROOM setting that selects the approximate temperature in the building. The boiler control does not measure the actual room temperature so the ROOM setting is simply the approximate desired temperature in the building. To get more heat, increase the ROOM temperature setting in…
-
I have a tekmar thermostat that shows OPN or OPEN. What does this mean?
OPN or OPEN means that there is an open electrical circuit on an auxiliary temperature sensor input. In the wiring area, check to see if an auxiliary sensor has been connected to the thermostat. If there are no wires connected to the auxiliary sensor terminals, the SENSOR setting in the ADJUST MENU…
-
My building is under heating, especially when it’s cold outside.
On the display the boiler control will show the outdoor temperature reading in the View menu. In some cases, the outdoor temperature is reading much warmer than the actual ambient outdoor air temperature. This results in the heating system using cooler water temperatures to heat the building. The…
-
I have a boiler control and the building is too hot during mild outdoor weather (50 to 65ºF, 10 to 20ºC). How can I turn down the heat?
During mild outdoor weather, the building can get too hot because the boiler must maintain a minimum temperature while operating to prevent damage. The control has an automatic warm weather shut down that turns off the boiler. Lowering the warm weather shut down setting will reduce or prevent over h…
-
Why won’t my boiler(s) fire? I wired the control with power and connected my boiler to it but it is not turning on the boiler(s). The boiler does fire when I press the test button.
Classic series tekmar controls require a call for heat, or demand, to be applied to the control. Check the display to see if a boiler demand is present, you may not have provided a demand to the control. Use the building thermostat, or end switches from zone valves or zone pump relays to apply eithe…
-
I have a mixing control and it shows a mixing demand but it will not open the mixing valve or the variable speed injection pump.
Mixing controls are designed to provide boiler return protection. On the control display, check the boiler temperature measurement in the View menu. Then enter the Adjust menu and check the BOILER MIN setting. If the measured boiler temperature is below the boiler minimum setting, the mixing control…
-
I have two controls on my system, can I connect them both to one outdoor sensor?
No, for classic series controls each control requires its own outdoor sensor. Example: Two 356 mixing controls, each require their own outdoor sensor 070. However, professional and designer series communicating controls use a network to share information such as the outdoor temperature. Once a si…
-
I have a Boiler staging control and a couple of mixing controls (classic series). It doesn’t seem as if the mixing controls are providing enough heat and the building is under heating.
Both the Boiler staging controls and the Mixing controls have a ‘Boiler Minimum’ setting to protect the boiler(s). The boiler and mixing controls are reading the boiler temperature at different locations, supply vs. return. Therefore, you must set the ‘Boiler Minimum’ setting on the mixing controls…
