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Eclipse Veri-Flame Instruction Manual 818-2/02
For modulation models: the modulation feature incorporates a high fire purge
time and a low fire purge time into the purge sequence. This feature allows the
Veri-Flame to sequence internal dry contacts which can be used by the customer
requiring a high fire purge of the combustion chamber before ignition.
The high fire and low fire purge times are selectable by means of DIP switches
(see Section 3, “DIP Switch Settings” on page 12):
SW4 ................................15 seconds SW6 ................................60 seconds
SW5 ................................30 seconds SW7 ............................. 120 seconds
The selected times are additive and apply to both the high fire and low fire purge
times (that is, high and low fire times are always identical).
The modulation terminals will sequence as follows:
The Automatic step occurs when the burners are operating and allows the
burner firing rate to be controlled by an automatic temperature controller.
High to Low Fire Purge
Modulation Capability
with High to Low Fire
Position Switch Interlocks
Sequence Step
Internal Contact Connections
Power Off Terminal 10 (Common) Terminal 11 (Auto)
Power On, Limits Open Terminal 10 (Common) Terminal 12 (Low Fire)
Purge To High Fire Terminal 10 (Common) Terminal 13 (High Fire)
Purge To Low Fire Terminal 10 (Common) Terminal 12 (Low Fire)
Automatic Modulation Terminal 10 (Common) Terminal 11 (Auto)
Alarm and Lockout Terminal 10 (Common) Terminal 12 (Low Fire)
System Errors &
Lockout Conditions
(Continued)
4) Low fire fail (for modulating model)–low fire switch open prior to trial
for ignition.
5) High fire fail (for modulating model)–high fire switch is not closed at the
end of high fire purge.
The following situations will result in a lockout condition:
6) Air failure (for purge and modulation models) – loss of combustion air
anytime during the operational cycle. The Air Failure LED will be on for this
condition. (See “Recycle Mode”).
7) Pilot flame fail (for all models) loss of flame during the trial for pilot ignition
period. The Flame Failure LED will be on for this condition.
8) Main flame fail (for all models) loss of flame during the main burner trial for
ignition or run period (recycling not selected). The Flame Failure LED will be
on for this condition.
The following result in lockout conditions after 30 seconds, the system error
light blinks about 14 times and then remains on:
9) If a flame is detected out of sequence, which may be caused by:
a) a faulty scanner (for all models);
b) electrical interference on the sensor wiring (for all models);
c) a flame exists in the burner or in the line of sight of a scanner, due to
a gas leak, product fire or other condition (for all models).
10) Air flow switch closed before start-up (for purge and modulation models).