14698_r00 9/18
PART REFERENCES
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 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
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
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