Congratulations on the purchase of your new tekmar thermostat.
This manual will step through the complete installation, programming and sequence
of operation for this control. At the back, there are tips for control and system
troubleshooting.
Installation
Caution
Improper installation and operation of this control could result in damage to the
equipment and possibly even personal injury or death. It is your responsibility
to ensure that this control is safely installed according to all applicable codes and
standards. This electronic control is not intended for use as a primary limit control.
Other controls that are intended and certified as safety limits must be placed into
the control circuit.
the back of the thermostat.
Use screws in the screw holes to fasten the
•
Thermostat
Base
Stud
thermostat to the wall. At least one of the
screws should enter a wall stud or similar
rigid material.
3
2
/8”
(60 mm)
screwhole
Wall
Mounted on wallboard
Thermostat Wiring
The thermostat operates a single heating system zone.
Power and communication are provided to the thermostat by connecting the tN2
terminals on the thermostat to the tN2 terminals on a tN2 Wiring Center, House Control,
Zone Manager or Expansion Module. tN2 terminals are not polarity sensitive.
Connect the optional auxiliary sensor wires to the sensor terminals 3 and 4.
For instructions see brochure
Use at least 65°C conductors
If the thermostat display turns on, this indicates that the thermostat is operating
correctly and there are no electrical issues. In the event that the display is off, or
the display is cycling on and off:
1. Remove the tN2 wires from the thermostat.
2. Use an electrical meter to measure DC voltage between the tN2 terminals.
If the DC voltage is 0 V (dc) for 20 seconds, then there is an open or short circuit
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in the tN2 wires.
If the DC voltage is 0 V (dc) for 10 seconds and then is 23 to 24 V (dc) for 5
•
seconds, this indicates the wiring is correct.
3. Connect the thermostat to the tN2 wires connected to a zone on a House Control,
Wiring Center, or Zone Manager.
4. If the thermostat display is off, or is cycling on and off, move the thermostat to the
next available zone on the House Control, Wiring Center, or Zone Manager.
If the thermostat display remains permanently on, there may be a fault with the
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previously tried zone on the House Control, Wiring Center, or Zone Manager.
If the thermostat display continues to be off, or is cycling on and off, there may
•
be a fault on the thermostat.
If a fault is suspected, contact your tekmar sales representative for assistance.
Testing the Heat Zone Output
1. Press the button and set the heating temperature above the current room
temperature. Make sure the display does not show “WWSD” or “Floor Max”.
2. When the H1 symbol appears on the display, use an electrical meter to check
for voltage on the House Control, Wiring Center, or Zone Manager relay. The
voltage is 24 V (ac) for zone valves, and 120 V (ac) for zone pumps when
operating correctly.
The thermostats’s exterior can be cleaned using a damp cloth. Moisten the cloth
with water and wring out prior to wiping the control. Do not use solvents or cleaning
solutions.
Switch Settings
528
Switches are set to “On”
position from the factory, and
do not require changing for
most applications.
For instructions see brochure
Use at least 65°C conductors
No Power
tN21tN2
Sensor
2
34
tNt 528
One Stage Heat
ON
Switch Settings:
1023-02
Scene
Setback
Off
Off
1234
12 34
Lock
Unlock
Not used
Not used
Mmm YYYY
Lot # 12345
Meets Class B:
Canadian ICES
FCC Part 15
Switch
1
2
3
4
Position
ON
OFF
ON
OFF
ON
OFF
ON
OFF
Action
SETBACK
The thermostat follows a programmable setback schedule
as a schedule member if available. Requires the installation
of a Timer 033 to use this feature.
OFF
The thermostat does not follow a programmable setback
schedule.
SCENE
The thermostat responds to changes in the scene (system
wide manual overrides). Requires the installation of a User
Switch 479 to use this feature.
OFF
The thermostat does not respond to scenes.
LOCK ACCESS LEVEL
Locked to ‘User’ access level. Set to Lock when installation
completed.
UNLOCK ACCESS LEVEL
Unlock to allow ‘User’ and “Installer’ access level. Set to
Unlock during installation process.
tekmarNet® reset control must also be set to Unlocked
(Installer access level).