tekmar 365 Mixing Control - Manual (Page 13)

Copyright © D 365 - 06/00 13 of 16
Indicator lights
There are fourteen LEDs on the front of the control that will aid in testing and troubleshooting. During normal operation, these lights
indicate the following functions:
Power light on • the 120 Vac power supply has been connected and the control is energized.
Heat Demand light on • the control is receiving a 24 or 120 Vac external heat demand signal at terminals Heat Dem — Heat Dem
(1 and 2) or from a 10K Zone Control or the heat demand selector switch is in the "Permanent Heat
Demand " position.
WWSD light on • the control has calculated that the outdoor temperature is warm enough to not require heat.
Unoccupied light on • the terminals Uno Sw —Com Sen (13 and 14) are shorted together, switching the control into the
Unoccupied (setback) mode.
Min. Return light on • the control is operating the mixing valve (4-20 mA) or variable speed pump (Var Pmp) to satisfy the
minimum boiler return temperature requirement.
Max. or Setpoint light on • the control is operating the mixing valve (4-20 mA) or variable speed pump (Var Pmp) to prevent
maximum supply temperature overshoot, or the control is operating in the setpoint mode.
Boiler light on • the boiler relay is on, closing the contacts between the Boiler (8 and 9) terminals.
Pump light on • the system pump relay is on, closing the contacts between the System Pmp (5 and 6) terminals.
% of full output lights on • the control is displaying the output level of both the 4-20 mA output (from terminals 10 and 11) and the
Variable Speed Pump output (from terminals 3 and 7) in incremental % levels.
Test light on • the control is going through the programmed test routine.
Step Seven Operational test of control functions - Test button
Testing the Control Functions
Test button
When the settings are made and the terminal plugs firmly seated, power up the control. For approximately 5 seconds, all the red
LED status lights and the yellow "% of full output" lights are turned on. If a fault in a sensor exists, the LED lights will flash an error
message until the fault is located and corrected. The error messages are listed on page 15.
If there are no flashing error messages, the control will enter the operating mode. To initiate the test routine, press the Test button.
All lights on (except Pump, Boiler) Test Starts Power-up for 5 seconds
90
70
50
30
10
Power WWSD
UnOcc.
Switch
Min.
Return
Boiler
Heat
Demand
Max. or
Setpoint
Pump
% of full
output
Test
90
70
50
30
10
Power WWSD
UnOcc.
Switch
Min.
Return
Boiler
Heat
Demand
Max. or
Setpoint
Pump
% of full
output
Test
Push Test Button
90
70
50
30
10
Power WWSD
UnOcc.
Switch
Min.
Return
Boiler
Heat
Demand
Max. or
Setpoint
Pump
% of full
output
Test
Power light on — Test light on — all "% of full output" lights on — System pump on
Once 100% output on the 4-20 mA and variable speed injection pump has been reached,
the control will then begin to ramp down the output and turn the system pump on.
During this 10 second step, if there is a heat demand signal, and the Test button is
pressed once, the test routine will be halted and the system pump will remain on. The
"Test" light will flash, and the control will be held in a pause mode for 5 minutes, after
which time it will automatically exit the test routine and cycle into normal operating mode.
Pushing the Test button during the 5 minute pause will allow the control to resume the
test routine at the next step.
Power light on — Test light on — Increasing "% of full output" lights on
The control ramps the variable speed pump and the 4-20 mA output
up to 100% together, in the time set by the "Motor Speed/ Pump
Response" dial.
If the Test Button is pushed once during this step, the "Test" light will
flash and the control will be held in a pause mode for 5 minutes, after
which time it will automatically exit the test routine and return to
normal operating mode. Pushing the Test button during the 5 minute
pause will allow the control to resume the test routine at the next step.
90
70
50
30
10
Power WWSD
UnOcc.
Switch
Min.
Return
Boiler
Heat
Demand
Max. or
Setpoint
Pump
% of full
output
Test
90
70
50
30
10
Power WWSD
UnOcc.
Switch
Min.
Return
Boiler
Heat
Demand
Max. or
Setpoint
Pump
% of full
output
Test
90
70
50
30
10
Power WWSD
UnOcc.
Switch
Min.
Return
Boiler
Heat
Demand
Max. or
Setpoint
Pump
% of full
output
Test
90
70
50
30
10
Power WWSD
UnOcc.
Switch
Min.
Return
Boiler
Heat
Demand
Max. or
Setpoint
Pump
% of full
output
Test
90
70
50
30
10
Power WWSD
UnOcc.
Switch
Min.
Return
Boiler
Heat
Demand
Max. or
Setpoint
Pump
% of full
output
Test
90
70
50
30
10
Power WWSD
UnOcc.
Switch
Min.
Return
Boiler
Heat
Demand
Max. or
Setpoint
Pump
% of full
output
Test