Flame Current Tester/Simulator - American Standard *UD Series Operation Manual

White-Rodgers Flame Current Tester/Simulator
To Be Used With The Following
White-Rodgers Control Models:
50E47-060, 50A50 and 50A51 series
May be used on other ignition modules that have
a separate (remote) flame current sensor rod.
Note 1
Remember – System lock out is normal if line voltage,
115V.A.C., leads are not connected to the furnace
module correctly. Hot leg to hot line and neutral line
to neutral terminal.
2 Flashes – System Locked Out – White-Rodgers Control
Series number 50A50 or 50A51
To Measure Flame Current
1. Unhook white wire from flame sensor probe.
2. Connect white wire removed in Step 1 to the white
lead on the tester.
3. Connect the black lead to the flame sensor probe.
4. Plug in a digital V.O.M. into the jacks on the
tester. Set V.O.M. to the D.C. volt scale. Meter must
be a minimum of 10 megohms resistance on the
D.C. volt scale.
5. Repower furnace and put in a call for heat.
6. Read the V.O.M. Voltage read equals microamps,
or 2 volts equals 2 microamps.
To Simulate Flame Current
1. Hook up tester and meter as above.
2. White-Rodgers Control number 50E47-060
Connect the green wire to "TR" terminal at the
White-Rodgers Control. White-Rodgers Control
number 50A50 Series or number 50A51 Series
connect the green wire to the Burner Frame.
3. Connect the red wire to the gas valve
hot lead, normally the red wire on current
furnaces. Use a V.O.M. to determine which
lead is the hot lead, if in doubt.
4. Repower furnace and put in a call for heat.
Push red button down on the tester until
the light comes on. Release the button at
this time. If light will not come on, gas valve is
not receiving 24 VAC power, go to Step 5.
5. Does the furnace continue to heat?
Yes/No
Yes
W.R. Module is OK, check:
1. Flame sensor
2. Burner ground
3. Rusty burner
4. Burner not making good
electrical connection.
5. Flame not burning on
flame sensor rod.
BURNER FRAME
50A50 OR 50A51
CONTROLS
RED
TO GAS VALVE
HOT LEAD
TESTER
SWITCH
DIGITAL VOLT METER
SIDE VIEW
DC VOLTS
+
26
No
Did light on tester come on? Yes/No
Yes
1. Check gas valve, 1. Check connec-
gas flow and hot
surface ignitor if
furnace did not
2. Move green
come on.
2. Check white wire
from flame current
sensor going to
module.
3. Check burner
frame ground wire.
Move green tester
wire from burner
frame to module
ground terminal
and retest furnace.
If furnace now
will stay on, fault
is in the burner
grounding.
3. Retest furnace –
4. Remember note
number 1.
5. If number 2, num-
ber 3, and number
4 above did not
correct problem,
replace module.
-TR
50E47 HSI CONTROL
BLACK
WHITE
WHITE SENSOR LEAD (FP)
RED LED
Flame Current Adapter
and Simulator
Pub. No. 34-4817-01
–
No
tion and voltage
at gas valve.
tester wire to
module ground
terminal. This
applies only to
furnaces using a
number 50A50 or
number 50A51
control. The
tester green lead
should
already be con-
nected to the
"TR" terminal on
furnaces using a
number 50E47-
060 control.
if no 24 VAC at
gas valve, check
wiring and trans-
former.
If wiring and
transformer are
OK, replace
module.
FLAME SENSOR PROBE