Heat Link 31360, Manual

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HeatLink
®
Mixing Valve Reset Control Stk# 31360
®
Link Heat
www.heatlinkgroup.com
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Troubleshooting
When troubleshooting any heating system, it is always a good idea to establish a set routine to follow. By following a consistent routine, many
hours of potential headaches can be avoided. Below is an example of a sequence that can be used when diagnosing or troubleshooting problems
in a hydronic heating system.
Establish the problem.
Get as much information from the customer as possible about the problem. Is there too much heat, not enough heat, or no heat? Is the problem
only in one particular zone or area of the building, or does the problem affect the entire system? Is this a consistent problem or only intermittent?
How long has the problem existed for? This information is critical in correctly diagnosing the problem.
Understand the sequence of operation of the system.
If a particular zone is not receiving enough heat, which pumps or valves in the system must operate in order to deliver heat to the affected zone?
If the zone is receiving too much heat, which pumps, valves, or check valves must operate in order to stop the delivery of heat?
Use the Test Routine
Press the Test button on the control and follow the control through the test sequence as described in the Testing section. Pause the control as
necessary to ensure that the correct device is operating as it should.
Sketch the piping of the system.
This is a relatively simple step that tends to be overlooked, however, it can often save hours of time in troubleshooting a system. Note flow
directions in the system paying close attention to the location of pumps, check valves, pressure bypass valves, and mixing valves. Ensure correct
flow direction on all pumps. This is also a very useful step if additional assistance is required.
Document the control for future reference.
Before making any adjustments to the control, note down all of the items that the control is currently displaying. This includes items such as
error messages, current temperatures and settings, and which devices should be operating as indicated by the LCD. This information is an
essential step if additional assistance is required to diagnose the problem.
Isolate the problem between the control and the system.
Now that the sequence of operation is known and the system is sketched, is the control operating the proper pumps and valves at the correct
times? Is the control receiving the correct signals from the system as to when it should be operating? Are the proper items selected in the menus
of the control for the device that is to be operated?
Test the contacts, voltages and sensors.
Using a multimeter, ensure that the control is receiving adequate voltage to the power terminals and the demand terminals as noted in the
technical data. Use the multimeter to determine if the internal contacts on the control are opening and closing correctly. Follow the instructions
in the Testing the Wiring section to simulate closed contacts on the terminal blocks as required. Test the sensors and their wiring as described
in the 10K Sensors L630070.
Testing & Troubleshooting
North American & European Versions