Flame relay
IFW T-N
- For signaling flame
- For multi-burner control during intermittent
operation in conjunction with automatic burner
control IFS 110 IM UV-detector or ionization control
with flame rod - Potential free contacts Integrated “ON” lamp
- FM approved
Application
To detect and signal an existing flame using
flame rod or UV-detector. Used for multi-
burner control together with the IFS 110 IM
automatic burner control or wherever a fully
automatic control is not required.
Function Description
The flame relay is immediately operational once the
operating voltage is applied. When a flame is present,
the active dc signal switches relay B. Depending on the
application at hand, the contacts of this relay B can be
used for control functions.
Multi-burner Control
Theoretically, there is no limit to the number of burners
which can be controlled. There must be assurance,
however, that all burners can be ignited within the trial
for ignition period for the automatic burner control (3;5 or
10 sec). Very long gas lines might result in delayed
ignition of a burner and cause a shutdown of the entire
system. Experience demonstrates that a number of
automatic burner controls should be used when systems
with more than 10 burners are involved.
The flame signal feeder line to the automatic burner
control is run via terminals 8 and 9 (normally open
contact). The normally closed contact is connected to
terminals 7 and 11 on the automatic control (see
connection diagrams and terminal connection diagram).
In the flame monitored by an IFW 15 T-N goes out during
operation, the flame signal to the automatic control is
interrupted and all other burners are switched off within
one second. If an outside light is detected before the
ignition (simulation of a flame), the system goes to
lockout.
Method of Operation of
Multi-Burner Control (Fig. 2)
The principle of the multi-burner control is that a
number of burners are controlled as one.
A type IFS 110 IM automatic burner control, which
can also monitor the first burner (only where
ionization control is used), is utilized for the overall
control function.
Each of the remaining burners of this group are
monitored by one IFW 15 T-N flame
Multi-Burner Control (Fig. 2)
The principle of the multi-burner control is that a
number of burners are controlled as one.
A type IFS 110 IM automatic burner control, which
can also monitor the first burner (only where
ionization control is used), is utilized for the overall
control function.
Each of the remaining burners of this group are
monitored by one IFW 15 T-N flame
Technical Data
Operating voltage: 110 VAC/120 VAC + 101-15%,
50/60 Hz
Power consumption: 12 VA
Output voltage for ionization sensor: 220 VAC
Sensor curent: > 1 pA DC
Output signal: Potential free contacts, one NC, one
NO contact
Contact rating: max. 2 A
Flame signal: lamp in device
Ambient temperature: —4 “F to 140 °F (—20 °C to
+60 °C)
Cable gland: Five openings for external wire
connection
Terminals: 2 x AWG 16 (2 x 1 .5 mm2)
Mounting position: any
Weight: 0.8 lbs (0.37 kg)
Operating voltage: 110 VAC/120 VAC + 101-15%,
50/60 Hz
Power consumption: 12 VA
Output voltage for ionization sensor: 220 VAC
Sensor curent: > 1 pA DC
Output signal: Potential free contacts, one NC, one
NO contact
Contact rating: max. 2 A
Flame signal: lamp in device
Ambient temperature: —4 “F to 140 °F (—20 °C to
+60 °C)
Cable gland: Five openings for external wire
connection
Terminals: 2 x AWG 16 (2 x 1 .5 mm2)
Mounting position: any
Weight: 0.8 lbs (0.37 kg)
Products - Burner Controls - Flame Relay