40 System Details
4.4.8.5 Setting the Special Operation Modes
To operate the boiler in special operation modes, press the Back
button (
) and the Menu button (
) simultaneously for
3 seconds, and then select “5. Special Operations”.
Press the Up button (
) or the Down button (
) to switch
between the operation modes. Press the OK button (
) to
select an operation mode.
The boiler resumes operation in normal operation mode if no
input is detected for 3 hours.
Press the Back button (
) to return to the previous screen or
menu.
Item
Description
1. Normal
Set the boiler to run in normal
operation mode.
2. 1st MIN
Set the boiler to run in 1st stage
minimum operation mode.
3. 1st MAX
Set the boiler to run in 1st stage
maximum operation mode.
4. CH 2nd MAX
Set the boiler to run in 2nd
stage central heating maximum
operation mode.
5. DHW 2nd MAX
Set the boiler to run in
2nd stage DHW maximum
operation mode.
6. 2nd MIN
Set the boiler to run in 2nd
stage minimum operation
mode.
Item
Description
1. Fan Motor
Test the fan operation.
From a stopped state, the fan
speed gradually increases and
reaches the maximum speed
at 6500 RPM, and then the fan
speed decreases until the fan
stops operating.
Note
Except for the Power
button (
), the
buttons do not work
during fan motor test
mode.
2. Circ Pump (Heating)
Test the boiler pump operation.
On (10 seconds) -> Off (5 seconds)
-> On (10 seconds) for 5 boiler
pump operation cycles
Note
Except for the Power
button (
), the
buttons do not work
during boiler pump
test mode.
3. 3 Way Valve
Test the 3 way valve operation.
●
The 3 way valve is turned on
as soon as you enter the test
mode.
●
Press the OK button (
) to
toggle the valve operation
[On (DHW) -> Off (CH)/Off
(CH) -> On (DHW)].
4. Dual Venturi
Test the dual venturi operation.
Press the OK button (
)
to toggle the dual venturi
operation [On (DHW) -> Off (CH)
-> On (DHW)].
5. Flow control Valve
Test the flow control valve
operation. Rotate the valve
from its current position to fully
(0%), then fully closed (100%)
and then back to the stating
position.
6. Mixing Valve
Test the mixing valve operation.
Rotate the valve from its current
position to fully (0%), then fully
closed (100%) and then back to
the stating position.
7. Recirc Pump (DHW)
Test the recirculation pump
(DHW) operation. Press the
OK button (
) to toggle the
pump operation [On -> Off ->
On].
Summary of Contents for NCB-700-2S+/42K
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