19
®
value exceeds the high control limit, the unit returns to status
3 (or status 13 if a post purge has been selected using option
parameter 09.1).
The high/low initiate input (PC11) is ignored.
If any selected drive deviates from its profile setpoint, the
unit will change to status 2 with a drive positioning fault.
13
MOVING TO POST
The safety shutdown output (PC1-2) is closed but the
PURGE
controlled shutdown output (PC3-4) is open, preventing
the burner from firing.
All selected air and option drives are driven to their purge
(P1) positions.
All fuel drives are driven to their close (P0) positions.
The unit will proceed to status 14 when the air and option
drives have stopped moving.
The burner select input (PC12), fuel select inputs (PC13, 14
and 17) and the high/low initiate input (PC11) are ignored.
14
POST PURGE
The safety shutdown output (PC1-2) and the controlled
shutdown output (PC3-4) are both closed.
All selected air and option drives are driven to their purge
(P1) positions.
All fuel drives are driven to their close (P0) positions.
The unit will return to status 3 when the post purge time has
expired (see option parameter 09.1).
The burner select input (PC12), fuel select inputs (PC13, 14
and 17) and the high/low initiate input (PC11) are ignored.
If the measured air or option drive positions do not match P1,
the unit will change to status 2 with a drive positioning fault.
Startup sequence
Safety shutdown O/P (PC1-2)
Controlled shutdown O/P (PC 3-4)
Ignition prove output (PC 5-6)
Purge prove output (PC 5-7)
HI / LO initiate input (PC 11)
Burner on input (PC 12)
Fuel drive(s)
Air and option drive(s)
- Energized\active
- Don't care
0/1
2
3
4
5
6
7
8
9
10 11 12 13
14
Fuel select inputs (PC13, 14, 17)
