tekmar 422 Universal Reset Module - Manual (Page 14)

© 2007 D 422 - 08/07 14 of 32
IF the tN4 DIP switch is set to Mix 2:
Step 4 The Mix 2 device ramps up to 100% over 10
seconds or according to the motor speed
setting.
Step 5 The Mix 2 device ramps down to 0% over
10 seconds or according to the motor speed
setting.
Step 6 The Mixing 2 pump on the mixing module turns
on for 10 seconds then shuts off.
Step 1 The Mix 1 device ramps up to 100% over 10 seconds
or according to the motor speed setting.
Step 2 The Mix 1 device ramps down to 0% over 10
seconds or according to the motor speed setting.
Step 3 The Mixing 1 pump turns on for 10 seconds then
shuts off.
IF the On-Off / Modulating DIP switch is set to Modulating
or the tekmar Stager / Off DIP switch is set to tekmar
Stager:
Step 9 When a demand is present, the modulation
output ramps up to 100%.
Step 10 When a demand is present, the modulation
output ramps down to 0%.
Testing the Control
HAZARD
Access to the Test button requires the removal of the
front cover and exposes hazardous voltage while the
control is powered. Only trained, qualified and competent
personnel should operate the Test button.
The control has a built-in test routine that tests the main
control functions. The control continually monitors the
sensors and displays an error message whenever a fault
is found. The individual outputs and relays are tested using
a test sequence.
Test Sequence
Each step in the test sequence lasts 10 seconds.
•
• Start the test sequence by pressing the Test button.
•
• Pause the test sequence by pressing the Test button
again. To advance to the next step, press the Test button
again.
• • If the test sequence is paused for more than five minutes,
the control exits the entire test routine.
• • To advance to a particular step, repeatedly press and
release the Test button to display the appropriate
device.
Test Press and Hold
for 1 second
Step 7 The primary pump turns on and remains on for
the rest of the test sequence.
Step 8 The boiler contact is closed to fire an on-off boiler
for 10 seconds or enable a modulating boiler.
The boiler contact is opened and the boiler is
shut off.
Step 11 If DHW MODE is set to 1 or 2, the primary pump is
shut off and the DHW Pump contact is closed.
If DHW MODE is set to 3 or 4, the primary pump
stays on and the DHW Pump contact is closed.
The control exits the test sequence.
If a device fails to operate during the test sequence, refer
to the W 422 Wiring Brochure to check the operation
of the control. If the control works properly, refer to any
troubleshooting information supplied by the equipment
manufacturer.