Installation and Operation Manual

6 of 40© 2011 D 552 - 08/11
Testing the Power
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 thermostat front.
2. Use an electrical meter to measure DC voltage between the tN2 terminals.
If the DC voltage is 0 V (dc) for at least 20 seconds, then there is an open or
short circuit 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
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.
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Testing the Thermostat Wiring
Testing tekmarNet
®
2 Wiring
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Wiring - Stand Alone to Switching Relay or Zone Valve Control
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---------
W
(T)(T)
R
24 V
W
(T)(T)
R
HNXX HNHN NL
Com
Switching Relay
Zone 1 Zone 2 Zone 3
W
(T)(T)
R
C
tN2
tN4
tN2
R
Rh W1
No Power
S1 S2
Com
Optional Sensor 1
Optional Sensor 2
Install field jumper
wire R to Rh
Zone Pump
N
L
Compatible Sensors
The thermostat is compatible with Indoor Sensor type 076, 077, 084, Floor Sensor type
072, 073, 079, and Outdoor Sensor type 070.