SECTION 19: E
LECTRICAL
97 of 154
1.
Operatin
g
Control
- This indicator is on
w
hen
po
w
er is present at terminals #1 and #7 of the
flame safeg
u
ard.
2.
Air Flow
- This indicator comes on at the same
time as the one abo
v
e. This is beca
u
se the
act
u
al circ
u
it is not
u
sed and is j
u
mped o
u
t. It
can be
u
sed as a tro
u
bleshooting g
u
ide, that
po
w
er is present to terminals #6 and #8 in the
flame safeg
u
ard.
3.
PTFI
- This acronym stands for Pilot Trial For
Ignition. This indicator is on only d
u
ring the trial
for ignition period. It indicates that terminal #3
(pilot
v
al
v
e) and terminal #4 (ignition mod
u
le),
in the flame safeg
u
ard, ha
v
e been t
u
rned on.
4.
Flame On
- This indicator comes on after the
flame safeg
u
ard has pro
v
en o
u
t the flame sig-
nal. It also sho
w
s that the main
v
al
v
es ha
v
e
been acti
v
ated in the eq
u
ipment. On the safe-
g
u
ard control, terminal #5 is po
w
ered
u
p.
5.
Alarm
- This indicates that a safety locko
u
t has
occ
u
rred,
w
hether by loss of flame signal or
fail
u
re to ignite.
19.14.2.1 Fireye
®
M4RT1 Flame Safe
g
uard Opera-
tion (ANSI, FM < 2.5MBH and XL < 1MBH)
The follo
w
ing
w
ill describe the internal operation of a
flame safeg
u
ard and the external f
u
nctions that
w
ill
take place. We
w
ill j
u
st trace the electromechanical
steps and not the electronic net
w
ork.
• All interlocks, control relays and safety limits are
closed. Po
w
er is s
u
pplied to terminal #7 of the
flame safeg
u
ard.
• The Operating Control LED ill
u
minates.
• The electronic net
w
ork is no
w
po
w
ered
u
p
w
hich
ill
u
minates the Air Flo
w
LED.
NOTE:
The airflo
w
circ
u
it of the safeg
u
ard control is
not
u
sed and is j
u
mped. This is
w
hy the Air Flo
w
LED
ill
u
minates
w
ith the Operating Control LED.
• Follo
w
ing a short time delay period (p
u
rge cycle)
determined by the j
u
mpers,
See Page 98, Figure
70
and Page 98, Table 33
. The electronic net
w
ork
closes a contact that po
w
ers
u
p terminal #3 and
terminal #4 in the safeg
u
ard control.
• Terminal #3 po
w
ers
u
p the eq
u
ipment's pilot gas
solenoid
v
al
v
e
w
hich opens allo
w
ing gas to flo
w
.
• Terminal #4 po
w
ers
u
p the ignition mod
u
le
creating the spark at the b
u
rner.
• This lasts for 10 seconds. This cycle is called trial
for ignition. D
u
ring this time period, the PTFI LED
is ill
u
minated.
• When the flame sensor detects a pilot flame, the
signal is sent back to the safeg
u
ard control. The
electronic net
w
ork ill
u
minates the FLAME LED.
• It closes a contact,
w
hich po
w
ers
u
p terminal #5
in the control. This terminal po
w
ers
u
p the main
gas
v
al
v
es allo
w
ing the main b
u
rner to come on.
• At the same time the electronic net
w
ork opens a
contact
w
hich remo
v
es po
w
er from terminal #4.
This sh
u
ts off the po
w
er to the ignition mod
u
le,
w
hich stops the spark at the b
u
rner. The
safeg
u
ard control at this point monitors the flame.
NOTE:
If a pilot flame is not detected d
u
ring the 10
second trial for ignition, the pilot gas solenoid
v
al
v
e
and the ignition mod
u
le are t
u
rned off. A safety
locko
u
t occ
u
rs
w
hich sh
u
ts do
w
n the electronic
net
w
ork. The only LED that
w
ill be ill
u
minated at this
time
w
ill be the OPERATING CONTROL. 30 seconds
after the locko
u
t occ
u
rs, the alarm circ
u
it is po
w
ered
u
p, ill
u
minating the ALARM LED. Man
u
al reset is
no
w
req
u
ired. Wait 10 seconds before resetting the
control to allo
w
the locko
u
t s
w
itch to cool do
w
n.
NOTE:
If the flame signal is lost
w
hile the b
u
rner is
on, the ignition mod
u
le
w
ill be t
u
rned back on. A 10-
second re-light trial for ignition is started. The PTFI
LED
w
ill ill
u
minate d
u
ring this time.If a flame signal is
detected, the main gas
v
al
v
es
w
ill t
u
rn back on and
the ignition mod
u
le
w
ill t
u
rn off. If a flame is not
detected d
u
ring this re-light trial, the pilot gas
solenoid
v
al
v
e and ignition mod
u
le
w
ill sh
u
t off. A
safety locko
u
t occ
u
rs
w
hich sh
u
ts do
w
n the
electronic net
w
ork. The only LED that
w
ill be
ill
u
minated at this time
w
ill be the OPERATING
CONTROL. Thirty seconds after the alarm locko
u
t
happens the alarm circ
u
it is po
w
ered
u
p, ill
u
minating
the ALARM LED. Man
u
al reset is no
w
req
u
ired. Wait
10 seconds before resetting the control to allo
w
the
locko
u
t s
w
itch to cool do
w
n.
19.14.2.2 Fireye
®
M4RT1 Flame Safe
g
uard (FM ≥
2.5MBH and XL ≥ 1MBH)
If the eq
u
ipment is ordered
w
ith a FM compliant
Manifold eq
u
al or o
v
er 2.5M BTU or XL compliant
eq
u
al to or o
v
er 1M BTU, certain seq
u
ences m
u
st be
pro
v
ided in the flame safeg
u
ard control. There is a
specified time for pre-p
u
rge, trial for ignition, and non
recycle.
Summary of Contents for 4044
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