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Testing the Control Wiring
Testing the Power --- - ----------------------- ----
- - - --- -- -- -- -- --- -- -- -- --- -- ---
If the control display does not turn on, check the Input Power
wiring terminals using an electrical multimeter. The voltage
should measure between 21.6 to 26.4 V (ac). If the voltage
is below this range, measure the line voltage side of the
transformer. The voltage should measure between 103.5 to
126.5 V (ac).
Testing the Thermostats ------------------------
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, follow this procedure.
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 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 from 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.
User Test - -- -- - - -- - - -- ----------- ------ ---- ------
- -- - - - -- - -- - -- -- -- -- -- -- --- -- -- --- -- -- --
The User Test is found in the Toolbox menu of the control.
Press the Menu button to access the Toolbox Menu. Press
the Item button to locate the User Test.
Start the test sequence by going to the User Test item and
pressing the 'Up' arrow button.
Pause the test sequence by pressing the Item button. To
advance to the next step, press the Item button again.
If the test sequence is paused for more than five minutes,
the control exits the entire test routine and returns to normal
operation.
To advance to a particular step, repeatedly press and release
the Item button to display the appropriate device.
User Test Sequence
Step 1 Zone 1 turns on for 10 seconds.
Step 2 Zone 2 turns on for 10 seconds.
Step 3 Zone 3 turns on for 10 seconds.
Step 4 Zone 4 turns on for 10 seconds.
Step 5 The Mix 1 device ramps up to 100% over 30 seconds
or according to the motor speed setting.
Step 6 The Mix 1 device ramps down to 0% over 30 seconds
or according to the motor speed setting.
Step 7 The mix system pump turns on for 10 seconds.
Step 8 The tank system pump turns on for 10 seconds.
Step 9 The O/B contacts are closed for 10 seconds.
Step 10 The HP loop pump turns on for 10 seconds.
- -- -- --- -- -- -- -- -- --- -- -
Step 11 The HP loop pump turns on and the Y1 contacts are
closed for 10 seconds
Step 12 The HP loop pump turns on and the Y2 contacts are
closed for 10 seconds if HP TYPE = ROT.
The HP loop pump turns on and the Y1 and Y2
contacts are closed for 10 seconds if HP TYPE =
2STG.
Step 13 The Backup contacts are closed for 10 seconds if
BACKUP = AUX.
Step 14 The transfer pump turns on for 10 seconds if
BACKUP = XFER.
Step 15 The variable speed pump turns on for 10 seconds if
BACKUP = VAR.
Step 16 The DHW pump turns on for 10 seconds if
WATERTEMP = T+B or T+MB and DHW Mode ≠
OFF.
Step 17 The boil system pump turns on for 10 seconds if
WATERTEMP = T+B or T+MB.
Step 18 If WATERTEMP = T+B or T+MB The boil system
pump turns on, and the tN2 zones, transfer pump,
variable speed pump (20%), and tank pump turn on
if necessary.
•
If the Boil Type is 1 Stage, the backup relay is closed for 10
seconds and then opened.
•
If Boiler Type is modulating 0-10 or 4-20, the backup relay is
closed for 10 seconds and the modulating output operates
at 50 % [5 V (dc) or 12 mA].
Step 19 Control returns to normal operation.
Testing the Zone Output -- -- -- -- ---- -- --- -- - -- --
Activate the User Test sequence and pause at Step 1 by pressing
the Item button once Zone 1 turns on. Using an electrical meter,
measure the voltage between the zone valve and the common
(C) terminals. The voltage should measure between 21.6 V
(ac) and 26.4 V (ac). Repeat for Zones 2, 3, and 4.
Testing the Variable Speed Pump --- - -- --- -- -- --
Activate the User Test sequence and pause at Step 5 or Step
15 by pressing the Item button once the variable speed pump is
operating at 100%. Using an electrical meter, measure the voltage
between the variable speed pump and a neutral. The voltage
should measure between 103.5 V (ac) and 126.5 V (ac).
Testing the Mix System Pump - -- -- ---- -- -- -- -- --
Activate the User Test sequence and pause at Step 7 by
pressing the Item button once the mix system pump turns on.
Using an electrical meter, measure the voltage between the
mix system pump and a neutral. The voltage should measure
between 103.5 V (ac) and 126.5 V (ac).
Testing the Tank System Pump - -- -- --- -- -- --- -- -
Activate the User Test sequence and pause at Step 8 by
pressing the Item button once the tank system pump turns on.
Using an electrical meter, measure the voltage between the
tank system pump and a neutral. The voltage should measure
between 103.5 V (ac) and 126.5 V (ac).
Testing the O/B Contact -- --- -- -- -- -- -- -- -- -- - -- -
Activate the User Test sequence and pause at Step 9 by
pressing the Item button once the O/B contact turns on. Using
an electrical meter, measure for continuity between the O/B
and Rc1 terminals.
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© 2011
D 406 - 12/11
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