119
Operating the Boiler
Item
Description
10. Zone V/V
2 status
Zone 2 valve output status
11. Zone V/V
3 status
Zone 3 valve output status
12. 3 way V/V
Status
3 way V/V output status
13. Fill Valve
Status
AWS V/V output status
14. Ext Recirc.
Pump Status
External Recirculation pump
output status
15. HTL Input
Status
HTL input status
16. Dual
Venturi Status Dual Venturi output status
17. LWCO
Input Status
LWCO input status
18. Air
Handler
Interface
Output Status
Air Handler Interface output status
11.6.3 Setting the Operation
Parameters
To set the boiler’s operation parameters, press the
Back button (
) and the Menu button (
)
simultaneously for 3 seconds, 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.
11.6.2 Viewing Input and Output Status
To view the boiler’s input and output status, press
the Back button (
) and the Menu button (
)
simultaneously for 3 seconds, and then select “2.
Input/Output Status”.
Rotate the Command dial (
) to switch between
the information items. Press the Command dial (
)
to select an item and view the information.
Press the Back button (
) to return to the previous
screen or menu.
Item
Description
1. SH1
Thermostat
Status
Space heating thermostat 1 input
status
2. SH2
Thermostat
Status
Space heating thermostat 2 input
status
3. SH3
Thermostat
Status
Space heating thermostat 3 input
status
4. Recirc.
Input Status
External Recirculation thermostat
input status
5. Boiler Pump
Status
Boiler pump output status
6. Zone1
Pump Status
Zone 1 pump output status
7. Zone2
Pump Status
Zone 2 pump output status
8. Zone3
Pump Status
System/Zone3 pump Status
9. Zone V/V
1 status
Zone 1 valve output status
Summary of Contents for NFC-250/175H
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