Viewing Input And Output Status; Setting The Operation Parameters - Navien NFC-175 Service Manual

4.9.2 Viewing Input and Output Status

To view the boiler's input and output status, press the Back button
( ) and the Menu button (
then select "2. Input/Output Status".
Rotate the Command dial (
items. Press the Command dial (
information.
Press the Back button (
menu.
Item
1. SH1 Themostat
Status
2. SH2 Themostat
Status
3. SH3 Themostat
Status
4. Recirc. Input Status
5. Boiler Pump Status
6. Zone1 Pump Status Zone 1 pump output status
7. Zone2 Pump Status Zone 2 pump output status
8. Zone3 Pump Status Zone 3 pump output status
9. 3 way V/V Status
10. Fill Valve Status
11. Ext Recirc. Pump
Status
12. HTL Input Status
13. Dual Venturi
Status
Version 1.0
) simultaneously for 3 seconds, and
) to switch between the information
) to select an item and view the
) to return to the previous screen or
Description
Space heating thermostat 1 input
status
Space heating thermostat 2 input
status
Space heating thermostat 3 input
status
External Recirculation thermostat input
status
Boiler pump output status
3 way V/V output status
AWS V/V output status
External Recirculation pump output
status
HTL input status
Dual Venturi output status
Item
14. LWCO Input
LWCO input status
Status
15. Air Handler
Interface Output Air Handler Interface output status
Status

4.9.3 Setting the Operation Parameters

To set the boiler's operation parameters, press the Back button
( ) and the Menu button (
and then select "3. Parameter Settings".
CAUTION
Parameters must be set by a qualified professional with
an extensive understanding of the boiler system. Setting
parameters improperly may lead to property damage or injury.
In the password screen, rotate the Command dial (
numbers and places, and press the Command dial (
the password.
The factory default password is "1234".
After entering the parameter setting screen, rotate the Command
dial ( ) to switch between the parameters or to increase/
decrease setting values. Press the Command dial (
parameter or to confirm after making changes.
Description
) simultaneously for 3 seconds,
) to change
) to enter
) to select a
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