14698_r00
9/18
PART REFERENCES
Type
TC340(1).(2)(3).(4).(5) option (6) (7) (8) (9) (10) (11) (12) (13) (14) (15) (16) (17) (18) (19) (20) (21) (22) (23) (24) (25) (26)
Type description
Type of application
A:
device for fan-assisted hot air generators
P:
device for premix hot air generators
(1)
P1:
device for premix burners with or without modulation
(2)
Customer's identification letter(s)
(3)
Progressive number identifying the type of board for a specific customer
(4)
Revision number of the microcontroller software with safety functions
(5)
Revision number of the microcontroller software with temperature adjustment functions
Options description
Ignition mode
No letter:
the ignition spark operates for the whole TSP (TS-1) time. Standard mode
A:
the ignition spark operates for the whole TS time
(6)
B:
the ignition spark switches off as soon as a flame signal is detected
Ignition voltage of the inbuilt ignition transformer
No letter:
15 kV for TC340A; not available for TC340 (P-P1). Standard mode
(7)
H:
18 kV
Spark repetition rate of the inbuilt ignition transformer
No number:
25 Hz. Standard mode
(8)
nn:
see “Inbuilt ignition transformer” section in “
TECHNICAL DATA” paragraph
Lockout due to extraneous light
No letter:
not available (the unit remains in permanent waiting/pre-purge status). Standard mode
K:
immediate lockout
(9)
Knn:
lockout with delay settable upon request (see
“OPERATING CYCLE VARIATIONS” paragraph)
Insufficient or no air flow at start-up
No letter:
the unit remains in stand-by status. Standard mode
(10)
Qnn:
lockout with delay settable upon request (see
“OPERATING CYCLE VARIATIONS” paragraph)
Insufficient or no air flow during ignition or in running status
No letter:
recycling without lockout. Standard mode
(11)
R:
immediate lockout (see
“OPERATING CYCLE VARIATIONS” paragraph)
Flame failure in running status
No letter:
recycling. Standard mode
(12)
V:
immediate lockout
Post-purge of the burner motor (EF)
No letter:
no post-purge. Standard mode
Pnn:
the post-purge is settable upon request and cannot be interrupted in case of heat demand restoration (see
“OPERATING CYCLE VARIATIONS” paragraph)
(13)
PTnn:
the post-purge is settable upon request and can be interrupted in case of heat demand restoration (see
“OPERATING CYCLE VARIATIONS” paragraph)
Recycling attempts after an ignition failure
No letter:
single ignition cycle after a safety shutdown. Standard mode
(14)
Ynn:
multiple recycling attempts upon request (see
“OPERATING CYCLE VARIATIONS” paragraph)
Inter-waiting or inter-purge time
No letter:
no inter-waiting or inter-purge time. Standard mode
(15)
Inn:
inter-waiting or inter-purge time settable upon request (see
“OPERATING CYCLE VARIATIONS” paragraph)
Air pressure switch checking
- For TC340A versions:
No letter:
air pressure switch checking available. Standard mode
G:
no air pressure switch checking (see
“OPERATING CYCLE VARIATIONS” paragraph)
Note:
option “G” is available for the control units designed for special applications where checking the air flow is not required by the reference
standard.
- For TC340 (P – P1) versions:
No letter:
no air pressure switch checking. Standard mode
(16)
GP:
air pressure switch checking at start-up and during pre-purge
Pre-ignition
No letter:
no pre-ignition. Standard mode
(17)
Jnn:
pre-ignition settable upon request (see
“OPERATING CYCLE VARIATIONS” paragraph)
Safety thermostat
No letter:
function carried out by BRAHMA double NTC safety probe type ST16. Standard mode
T:
device with contact safety thermostat control
(18)
NT:
device without safety thermostat control
