Testing the control – tekmar 374 Universal Reset Control User Manual

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The control has a built-in test routine that is used to test the main control
functions. The control continually monitors the sensors and displays an
error message whenever a fault is found. See the following pages for a
list of the control’s error messages and possible causes. When the Test
button is pressed, the

Test light is turned on. The individual outputs and

relays are tested in the following test sequence.

Testing the Control

TEST SEQUENCE

Each step in the test sequence lasts 10 seconds.

During the test routine, if a demand from the system is present, the test sequence may be paused by pressing the Test button.
If the Test button is not pressed again for 5 minutes while the test sequence is paused, the control exits the entire test routine. If
the test sequence is paused, the Test button can be pressed again to advance to the next step. This can also be used to rapidly
advance through the test sequence. To reach the desired step, repeatedly press and release the Test button until the appropriate
device and segment in the display turn on.

Step 1 – The mix 1 device ramps up to 100% or full open for 10 seconds.

Step 2 – The mix 1 device ramps down to 0% or closes fully for 10 seconds.

Step 3 – The mix 1 pump turns on for 10 seconds then shuts off.

Step 4 – The mix 2 device ramps up to 100% or opens fully for 10 seconds.

Step 5 – The mix 2 device ramps down to 0% or closes fully for 10 seconds.

Step 6 – The mix 2 pump turns on for 10 seconds then shuts off.

Step 7 – The primary pump turns on and remains on and remains on.

Step 8 – Boiler 1 fires if set to automatic.

Step 9 – Boiler 2 fires if set to automatic.

Step 10 – Both Boilers are shut off.

– If DHW MODE is set to 1 or 2, the primary pump is shut off and the DHW Pmp/Vlv contact is closed.

– If DHW MODE is set to 3 or 4, the primary pump stays on and the DHW Pmp/Vlv contact is closed.

Step 11 – The control exits the test sequence.

MAX HEAT

The control has a function called Max Heat. In this mode, the control
turns on and operates the system up to the maximum set temperatures
as long as there is a demand for heat. The control continues to operate
in this mode for up to 24 hours or until the Item, Menu or Test button
is pressed. This mode may be used for running all circulators during
system start-up in order to purge air from the piping. To enable the Max
Heat feature, use the following procedure.

1) Press and hold the Test button for more than 3 seconds. At this point,

the control flashes the MAX segment and displays the word OFF

2) Using

the

▲ or ▼ buttons, select the word On. After 3 seconds, the

control turns on all outputs. However, the max heat mode is still

limited by the

BOIL MAX setting.

3) To cancel the Max Heat mode, press the Item, Menu, or

Test button.

4) Once the Max Heat mode has either ended or is cancelled, the

control resumes normal operation.

Menu

Item

Menu

Item