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Tekmar tekmarNet 552 User Manual

Made by: Tekmar
Type: User Manual
Category: Thermostat
Pages: 13
Size: 1.33 MB


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User Manual



 Thermostat 552

Replaces: New


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 © 2011 

  U 552 - 08/11


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© 2011 

  U552 - 08/11 

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This brochure will provide you with the information you need to benefit the most 
from your tekmarNet


 thermostat. Please visit www.tekmarcontrols.com for more 

detailed information on this or any other tekmar product. 

This thermostat provides heating for one zone in your building. It will maintain your 
air temperature with an on board room sensor. Floor temperature control may also 
be enabled in this thermostat when a floor sensor is installed. This thermostat can 
lower its temperature setting at night or when you are away from the house.


the Time.

Adjust the



 Thermostat 552 Home Screen

Display the Floor, 
Outdoor or Set 
Room Temperature.



While on 


Turn the 

Heat on 

or Off.

Return to the 
‘Home’ Screen 
from any menu.

Adjust the Temperature.




Display of the time, schedule and the away key on the home screen is optional and 
can be turned on or off in the programming menus.

To enter the programming menus, press and hold the Home button for 3 

Touchscreen Adjustments

The touchscreen of this thermostat makes it easy to change commonly used settings. 
Touch any item to adjust it’s setting. You will hear a “tick” sound each time you touch 
the display. When you are finished making changes, touching the home button will 
return to the home screen. If you do not touch the screen for 3 seconds, the home 
screen is automatically displayed.


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Display Symbols

This thermostat will display symbols on its screen in order to indicate what mode it 
is in, what temperature it is operating at, or what equipment it is trying to turn on. 
This section describes each of those symbols. 


Heat is turned on.


Operating at the occupied (day) temperature.


Operating at the unoccupied (night) temperature.



Communication is present.


Indicates an error is present.


Adjust the displayed setting.


Operating at Away temperature.


Hold for 3, 6, 9 or 12 hours.


The outdoor air temperature is above the Warm 
Weather Shut Down setting which shuts off the 
boiler for heating.


Radiant floor cooling system is on.





Reached the room minimum or maximum.





Reached the floor minimum or maximum.


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Adjust the Temperature - Temporary Hold

Temporary hold allows a user to change the temperature for a period of time and then 
automatically return to the permanent temperature setting. This is especially useful 
in commercial buildings that are in use for short amounts of time. When selected, 
touching the up or down arrows changes the temperature for either 3, 6, 9 or 12 
hours. If the thermostat is using a schedule, ‘Schd’ provides a temporary hold until 
the next schedule event time. After the temporary hold time expires, the thermostat 
returns to normal operation. By default, the temporary hold feature is off.

Adjust the Temperature

To change the set temperature, touch the   or   arrows to select a preferred 
temperature setting. Press the home button to accept the setting or leave the screen 
untouched for several seconds. This thermostat is capable of controlling the floor or 
air temperature. When set to control the floor temperature alone, the large display 
will say “Floor” instead of “Room”.


The temperature is not adjustable if the thermostat is in the Away scene, the Off 

mode or has been set to the “Limited” or “Secure” access level by the installer. 



When the temporary 
hold feature is enabled, 
touching the up or 
down arrow displays 

Use the Up or Down 

arrow to select a 


Tap the hour 
setting until 
the preferred 
length of time 
is displayed.

Cancel the 



‘HOLD’ is displayed while the 
thermostat is operating at the 

temporary hold temperature.


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Adjust the Time

Secondary Temperature Display

This thermostat can display the outdoor, floor or room set temperature in the smaller 
number area at the top right of the screen. To toggle the item currently displayed, 
touch the secondary temperature. Display of the floor or outdoor temperature 
requires a connection to an external floor or outdoor air sensor.

To change the current time, touch the clock on the display.

Use the   or   arrow to change the minutes, hour 
and day.

Touch “NEXT ITEM” to advance to the next item or 
“BACK” for the previous item.

To store the new time and date, press the home button, 
or leave the screen untouched for several seconds.


The time is not visible when the thermostat is in 

the Away scene or if the clock display is turned off in the 
Time menu.


Mode Heat or Off

Heating operation can easily be turned off by selecting the “Off” mode. Touch the 
Mode key on the screen to change between Heat and Off. The temperature is not 
adjustable while the thermostat is off. 


 If near freezing temperatures are detected the system will operate to maintain 

40°F (4.5°C), even in the Off mode.



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This thermostat is capable of running at a lower temperature setting when you are 
asleep or out of the building. When the schedule setting is on, day 

 and night   

temperature settings will display on the screen. If you adjust the temperature while 
the sun is displayed, the day setting changes. If you adjust the temperature while 
the moon is displayed, the night setting changes.

To adjust the times when the day and night temperature start, touch the sun 


moon   on the screen. “Schedule Menu” will display followed by the first adjustable 
schedule event time.

Programmable Schedule - Day 

 and Night 

Use the   or   arrow to adjust the time for each event.

Touch ‘NEXT ITEM’ to advance to the next event or 
‘BACK’ for the previous event.

To accept the settings, press the home button, or leave 
the screen untouched for several seconds.

This thermostats schedule can be set to 2 or 4 events 
per day repeating on a 24 hr or 7 day cycle. These 
schedule settings are detailed later in this brochure.

Going Away Setting

This thermostat can save additional energy while you are 
away by operating at a lowered temperature. To enable 
this feature, touch “Going Away” on the screen. This is 
only available when the Away Key has been turned on 
in the Scene menu.

Select PERM (permanent) or a number of days using 
the   or   arrow.

Press the home button to accept the setting or leave 
the screen untouched for several seconds.

“Scene Away” is displayed on the home screen until 
the number of days expires.

Touch “Cancel Away” to cancel at any time.


The temperature is not adjustable while the 

thermostat is in Away.

Access Levels

This thermostat has access levels. It will typically be installed and programmed by a 
heating professional and then locked in a “User”, “Limited”, or “Secure” access level. 
System critical settings will not be available for adjustment. For more information on 
these settings, please consult your installing contractor or this product’s Installation 
and Operation Manual. This brochure focuses on settings available to the “User”.



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Program Menu Settings

Press and 
hold for 3 
seconds to 
access the 

To Enter the Programming Menus



Press and hold the Home button for 3 seconds to enter the programming menus.

Select a Programming Menu



Touch “NEXT” to advance (clockwise in the illustration below) to the next menu.
Touch “BACK” to go backwards (counterclockwise in the illustration below) through 
the menus.
Touch “ENTER” to enter a menu.

Setting Items



Touch   or   arrow to adjust the setting if required.
Touch “NEXT ITEM” to advance to the next item within the menu.
Touch “BACK ITEM” to go backwards to the previous item within the menu.
To return to the parent menu after changing a setting, press and release the home button.
To return to the home screen, press and release the home button twice or wait 30 
seconds to automatically return to the home screen.


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Screen Clean Menu

Entering the Screen Clean menu gives you 30 seconds to clean the thermostat and 
display with a moist cloth. Do not use solvents to clean the thermostat.

Set Temp Menu

Entering the Set Temp menu allows you to permanently change both the day 


and night   temperature settings for the room and / or floor.

If your thermostat is being used for radiant floor heating, a floor sensor can be 
connected to it. Radiant floors heat the air by raising the floor temperature. Setting 
a floor temperature is a way of enhancing the comfort of your living space. There 
are two methods to operating the thermostat using a floor sensor.

Floor Temperature Only



If the air sensor has been disabled, the thermostat will only maintain floor temperature 
and ignore air temperature. This operation is recommended for areas such as 
bathrooms to ensure that tile floors are warm to the touch.

Floor and Air Temperature 



If the air sensor is turned on and a floor sensor is connected, the thermostat will 
maintain your desired air temperature as well as a minimum floor temperature.

This operation is recommended for areas with large windows that allow the sun to 
shine into a room and keep it warm without the need for heat. This can allow the 
floors to cool off during the afternoon. When the sun goes down, it can take a long 
time for the floors to get warm again. This may cause the room to cool off too much in 
the early evening. A floor minimum setting can help with this condition by maintaining 
a floor minimum temperature. Keep in mind the floor minimum temperature will 
override the air temperature, and if set too high, may overheat the room.

This operation is also recommended for rooms with hardwood floors. The floor 
maximum setting prevents damage to the wood floor from overheating.

90°F (32°C)
Feels hot to the touch

80 to 85°F (26 to 30°C)
Feels warm to the touch

70°F (21°C)
Feels cool to the touch

40 to 45°F (5 to 7°C)
Feels cold to the touch

Suggested maximum for all floor 
types other than wood.

Bathrooms and kitchens. Suggested 
maximum for wood floors.

Rooms with large windows preventing 
under heating in the evening.

Freeze protection for garages.


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Time Menu Settings

Set date, month and year

Required for daylight savings time.

Daylight Save

Automatic daylight saving time update for the spring and fall.

Time Mode

Select either 12 or 24 hour time format.


Select on to display the time clock in the Home menu (available when schedules 
are not used).

Schedule Menu Settings

Lowering the room temperature setting reduces the amount of fuel required to heat 
the building resulting in energy savings. 
When operating on a programmable schedule, a   or a   symbol is shown in the 
home menu. The   or   indicates the current operating temperature.

All schedules are stored in permanent memory and are not affected by a 
loss of power.



Day temperature

Night temperature

This thermostat can operate on a programmable schedule in order to automatically 
lower the room temperature setting. Options include:

Turning off the schedule (OFF)
Operate a schedule that applies only to this thermostat zone (ZONE)
The ability to operate one of the four system-wide schedules as a master (Schedule 
Master 1 through 4*)
Join one of the four system-wide schedules as a member (Schedule Member 
1 though 4*)

*Requires the thermostat to be connected to a tekmarNet



Once the type of schedule has been selected, the thermostat can support schedules 
that have either:

2 events per day
4 events per day

Schedules with four events per day are common for residential use while two events 
per day are common for commercial installations.


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Scene Menu Settings


Scenes provide system-wide overrides to save energy. Select whether scenes are 
not used (none) or if the away scene is available.

Away Key

If scenes are available, select if the away key is available or not.


When used in conjunction with a tekmarNet


 system control to operate the 

heating appliance, the domestic hot water tank is not heated while in away scene.

Display Menu Settings


Select temperature units in degrees Fahrenheit or Celsius.

Backlight Options

Select how the display backlight operates.

ON = The display is always at full brightness.
DIM = When thermostat is not in use, the display is dim but is at full brightness 
when touched.
DIM   = When the thermostat is not in use, the display is dim while the schedule 
or scene is  . The display backlight is off when the schedule or scene is  . The 
thermostat display is at full brightness when touched.
ON   = When the thermostat is not in use, the display is at full brightness when 
the schedule or scene is  . The display backlight is off when the schedule or 
scene is  . The thermostat display is at full brightness when touched.
OFF = The display backlight is always off.

Secondary Item

Select whether the outdoor or floor temperature is shown in the upper right hand 
corner in the Home menu.

The schedules can be repeated every:

24 hours
7 days (week)

A 7 day schedule allows a unique time to be set to change the temperature for each 
day of the week.

The schedule also includes a “SKIP” option that allows the programmable schedule 
to skip a temperature change and remain at the previous temperature setting. The 
“SKIP” setting can be found between 11:50 PM (23:50 hours) and 12:00 AM (0:00 

When a programmable schedule is selected, there is a time delay for the room to 
warm up from the   temperature to the   temperature. The thermostat has the 
option to use Optimum Start to predict the heat up rate of the room. When Optimum 
Start is set to On, the heating is started in advance to allow the room to reach the 
Set Room   temperature at the time set in the programmable schedule.

Schedule Menu Settings (Continued)


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Monitor Menu

The monitor menu allows you to view the following temperatures and running 

Outdoor temperature highs and lows
Room temperature highs and lows
Floor temperature highs and lows (requires floor sensor to be installed)
Heat W1 = Number of hours the thermostat is actively heating the room
Cool W1 = Number of hours the thermostat is actively cooling the room (available 
in select radiant floor cooling installations)

To clear the temperature highs and lows or the running hours:

1. Touch the temperature or running hours.

2. Display will show “


3. Touch Enter. 

Toolbox Menu

This menu is provides advanced level information.


Change the access level on the thermostat.

Status Info

Displays the current status of the thermostat including any overrides from the tekmarNet



system control. Toggles between “Status Info” and the current status.

System Normal = Thermostat is operating normally.
Override W1 = The tekmarNet


 system control is either forcing the heating W1 

relay on or off.
Cooling Floor = Floor cooling is in effect.
WWSD = Warm Weather Shut Down is in effect.
Air Group Master Cool = Heating is off while the cooling system is on.
Optimum Start = Heating is started early in order to  meet   temperature setpoint 
at Event 1 or Event 3.
Floor Max = The floor has reached its maximum temperature. Some under heating 
could occur.
Floor Min = The floor is operating at its minimum temperature. Some over heating 
could occur.
Baseload On = Baseload heating is on even though the room temperature is 
satisfied. Reduces heat up time when the sun sets in the evening.

Software Version and Type Number

Display the software “SW”  and the “TYPE” number.


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All specifications are subject
to change without notice

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U 552 - 08/11.

tekmar Control Systems Ltd., Canada
tekmar Control Systems, Inc., U.S.A.

Head Office: 5100 Silver Star Road
Vernon, B.C. Canada V1B 3K4
(250) 545-7749  Fax. (250) 545-0650
Web Site: www.tekmarcontrols.com

Product design, software and literature
are Copyright © 2011 by:
tekmar Control Systems Ltd. and tekmar
Control Systems, Inc.

More Information

Frequently Asked Questions

This User Brochure contains standard information on how to make adjustments 
to an installed product. More detailed information can be found in this product’s 
Installation and Operation Manual (D552) at www.tekmarcontrols.com


Look for...

Corrective Action

No heat

 indicates heat is on. If the 


is displayed and there is no heat, contact 
your heating professional.


The thermostat is in the Off mode. Touch 
the mode key to change to Heat.

No   or   key

Touch the ‘Cancel Away’ key on the display.

Heat on before 
scheduled time


Optimum Start is on and has turned on the 
heat in advance of your schedule change.


 key does 

not increase 



There may be a maximum room temperature 
set. Consult your heating professional.


The floor has reached the floor maximum 
setting. Consult your heating professional.


Warm weather shut down is in effect. 
Adjustable from your system control.

key does not 


There may be a minimum floor temperature 
set. Consult your heating professional.


The floor has reached the floor minimum 
setting. Consult your heating professional.


Floor cooling is in effect. Locate the heat-cool 
thermostat to set the cooling temperature.