20
Stage
no.
Stage name
Description
2.
Wait for purge
(EK5)
(EK11-14)
(EK31)
The ‘controlled shutdown’ output on PE3 will be switched on, to tell
the burner controller there is a call for heat.
This control waits for a fuel/profile select signal on one of the (line
voltage) terminals PE9, PE10, PE11 or PE12 and a purge request
(HIGH input, PA9 - PA11 closed. This input is low voltage). This
would normally come from the burner controller.
If the fuel/profile select input is removed (PE9, 10, 11 or 12), the
control will immediately move to status 1.
3. & 4.
N/A
Not Applicable to PPC6000
Note : Statuses 3 and 4 are reserved for a gas valve proving system
and are not implemented on this control. This control will advance
directly to status 5 once the conditions above have been met.
5.
Prove closed
positions
(EK80-89)
The fuel and air motors are moved down until they are stopped by the
‘closed position’ micro-switches in the servos. The final positions are
compared with the closed positions stored in memory, and must be
within
r
5º of the stored values otherwise the control will lockout.
Variable frequency drives must read zero. (4 mA)
When all drives have stopped moving, the control will advance to
status 7. The ‘HIGH’ input (PA9 to PA11)still must be made during
this time.
If the fuel/profile select input is removed (PE9, 10, 11 or 12), the
control will immediately move to status 1.
6.
N/A
Not Applicable to PPC6000
Note : Status 6 is reserved for air pressure detection, and is not
implemented in this control. This function must be provided by the
burner controller.
7.
Moving to Purge
The selected motors are moved up towards the purge position. When
the drives have all stopped, the control moves to status 8.
If the fuel/profile select input is removed (PE9, 10, 11 or 12), the
control will immediately move to status 1.
Summary of Contents for PPC6000 Series
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