40
£
Option 2.7 - Maximum permissible leakage rate (0 - 99.9 l/h)*
This is the maximum permissible leakage rate allowed during the valve leak test (in liters per hour).
this value must be set according to the installation and local regulations. Refer to “Valve Prove Test
Sequence” page 26.
Option 2.8 - Vent valve select (0 - 2)*
This option parameter is used to select the operation of the vent valve.
Option 2.9 - Fuel Valve Proof of Closure select (0 -3)*
This option parameter is used to select the proof of closure function. Use option 10 to map digital
outputs.
Option 3.0 - Flame detection device (0 - 2)*
Depending on the application, one of three different flame detection options must be chosen.
Option 3.1 - False flame detection time
This option parameter is only applicable to the UL only product (NX3100, 4100). NX3000, 4000 is
always less than 3 seconds.
Option 3.2 - Flame failure response time
This option parameter is only applicable to the UL only product (NX3100, 4100). NX3000, 4000 is
always less than 1 second.
Option 3.5 - Fan establish time (0 -120 sec)*
This option delays the opening of the valve and damper servos for the time entered in this option, this
aids blower start-up. The timing in T1 (prove air pressure) is adjusted to include this delay.
0
No vent valve used. Use main valve 2 to vent into the boiler, when using V.P.S.
1
Vent valve used, output energized to open valve (used for V.P.S.).
2
Vent valve used, output energized to close valve, (powered at sequence 5).
0
Deselected, no proof of closure function selected
1
Gas main valve 2 checked
2
Oil valve checked
3
Both main gas valve 2 and oil valve checked
0
IR detector
1
Ultraviolet (UV) detector, non self-checking.
2
Ultraviolet (UV) detector, self-checking use with 45UV5-1009
0
False flame detection time < 3 seconds
1
False flame detection time < 30 seconds
0
Flame failure response time < 1 second (0 left to retain compatibility with CE product)
1
Flame failure response time < 1 second
2
Flame failure response time < 2 seconds
3
Flame failure response time < 3 seconds
