Installation

ManualsBrandstekmar ManualsSensors364 Universal Reset Control

When troubleshooting any heating system, it is 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 troubleshoot-

ing problems in a hydronic heating system.

Troubleshooting

Establish the problem. Get as much information from the customer as possible about the prob-

lem. Is there too much heat, not enough heat, or no heat? Is the problem only in one zone 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 valve 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 delivery of heat?

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 the 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 indi-

cated 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 the closed contacts

on the terminal blocks as required. Test the sensors and their wiring as described in the sensor

Data Brochures.

Monitor the system over a period of time. Select the applicable items in the Monitor menu of the

control and reset them to zero. Allow the system and the control to operate over a known period

of time and then record the Monitor items. Use the information to help diagnose any remaining

problems.

Establish the

Problem

Understand

the Sequence

of Operation

Use the Test

Routine

Sketch the

Piping in the

System

Document the

Control

Isolate the

Problem

Test the

Contacts

Voltages &

Sensors

Monitor the

System