10
C
A
U
T
IO
N
H
I-V
O
LT
A
G
E
G
ro
u
n
d
V
a
lv
e
A
la
rm
ACL Manufacturing
Ignition Module
1
2
vd
c
+
ignition wire
Meter
Leads
Red
Black
2.0
m
A DC
High Voltage
Ignition Wire
Meter
Ceramic
Insulator
Metal Strain
Relief
Adjustable
Bracket
sst Pilot
Nozzle
1/8 " Gap Setting
to inside edge
of Nozzle
Ignitor/Flame Rod
Ground Lug.
ACL M50
Mixer
1/8" Gas
Connection
Air Shutter
Test
Harness
Flame Signal Test Procedure
1. Turn power off to ACL controller
2. Remove High-Voltage Ignition wire from Ignition Module and
insert meter leads with test harness as shown
3. Turn on power and initiate start sequence
4. Meter will give erratic readings during ignition period but
should settle down between 1-2
µ
A reading on meter
5. Adjust air shutter on pilot mixer and adjust pressure on
regulator to achieve a flame signal close to 2
µ
A which is optimum
ACL 5500 Combustion Safety Controller
ACL 5500 Combustion Safety Controller
