100 Operating the Boiler
Item
Description
1. SH1 Thermostat
Input
Space heating thermostat 1 input
status
2. SH2 Thermostat
Input
Space heating thermostat 2 input
status
3. SH3 Thermostat
Input
Space heating thermostat 3 input
status
4. DHW Thermostat
Input
DHW thermostat 1 input status
5. Boiler Pump
Output
Boiler pump output status
6. Zone1 Pump
Output
Zone 1 pump output status
7. Zone2 Pump
Output
Zone 2 pump output status
8. Zone3 Pump
Output
Zone 3 pump output status
9. HTL Input
HTL input status
10. Dual Venturi
Output
Dual Venturi output status
11. LWCO Input
LWCO input status
12. Air Handler
Output
Air Handler Interface output status
13. DHW Priority
Output
DHW priority output status
Item
Description
8. Δ T Limit - No. of
times
Number of times supply return
temperature limit control has activated
9. Supply Limit - No.
of times
Number of times Recirculation supply
temperature limit control has activated
10. Δ T High - No. of
times
Number of times combustion stopped
due to supply return temperature
11.6.2 Viewing Input and Output Status
To view the boiler’s input and output status:
1. Tap the Set button (
) >
Service
.
2. Tap
Open
on the In/Out Status menu.
Summary of Contents for NHB Series
Page 120: ...120 Appendixes 12 6 Component Assembly Diagrams and Part Lists 12 6 1 Case Assembly NFB 301C...
Page 122: ...122 Appendixes 12 6 2 Case Assembly NFB 399C...
Page 124: ...124 Appendixes 12 6 3 Heat Exchanger and Waterway Assembly NFB 301C...
Page 126: ...126 Appendixes 12 6 4 Heat Exchanger and Waterway Assembly NFB 399C...
Page 128: ...128 Appendixes 12 6 5 Combustion Parts Assembly NFB 301C...
Page 131: ...131 Appendixes 12 6 6 Combustion Parts Assembly NFB 399C...
Page 134: ...Memo...
