99
Operating the Boiler
11.4.6 Diagnosing the Boiler System
To run a series of test procedures for a system diagnosis, press the
Back button (
) and the Menu button (
) simultaneously for 3
seconds, and then select “6. Test Mode”.
Rotate the Command dial (
) to switch between the test
procedures. Press the Command dial (
) to run a test procedure.
Press the Back button (
) to return to the previous screen or
menu.
Item
Description
1. Fan Motor
Test the fan operation by manually
changing the fan speed.
●
From a stopped state, the fan speed
gradually increases and reaches
the top speed, and then the fan
speed decreases until the fan stops
operating.
●
Rotate the Command dial (
) to run
or stop the fan test.
2. Boiler Pump
Test the boiler pump operation.
●
The boiler pump is turned on as soon
as you enter the test mode.
●
Press the Command dial (
) to
toggle the pump operation (On ->
Off / Off -> On).
3. Zone 1 Pump
Test the Zone 1 pump operation.
●
The Zone 1 pump is turned on as
soon as you enter the test mode.
●
Press the Command dial (
) to
toggle the pump operation (On ->
Off / Off -> On).
Item
Description
4. Zone 2 Pump
Test the zone 2 pump operation.
●
The zone 2 pump is turned on as
soon as you enter the test mode.
●
Press the Command dial (
) to
toggle the pump operation (On ->
Off / Off -> On).
●
This option is available only when
the “Zone Pump System” is active.
5. Zone 3 Pump
Test the Zone 3 pump operation.
●
The Zone 3 pump is turned on as
soon as you enter the test mode.
●
Press the Command dial (
) to
toggle the pump operation (On ->
Off / Off -> On).
6. 3 Way Valve Output
Test the 3 Way valve operation.
●
The 3 Way valve is turned on as soon
as you enter the test mode.
●
Press the Command dial (
) to
toggle the valve operation (On -> Off
/ Off -> On).
7. Flow Control Valve
Output
Test the Flow control valve operation.
Rotate the valve from its current
position to fully open (0%), then fully
closed (100%) and then back to the
starting position while checking
feedback.
●
Display of the valve close ratio %
●
Display of “FEEDBACK” when
detecting the feedback
8. Mixing Valve
Output
Test the Mixing valve operation. Rotate
the valve from its current position
to fully open (0%), then fully closed
(100%) and then back to the starting
position while checking feedback.
●
Display of the valve close ratio %
●
Display of “FEEDBACK” when
detecting the feedback
9. Dual Venturi
Test the dual venturi operation.
●
The dual venturi is turned on as soon
as you enter the test mode.
●
Press the Command dial (
) to
toggle the dual venturi operation (On
-> Off / Off -> On).
10. Recirc. Pump
Test the recirculation pump.
●
The recirculation pump is turned on
as soon as you enter the test mode.
●
Press the Command dial (
) to
toggle the recirculation pump (On ->
Off / Off -> On).
Summary of Contents for NFC-175
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