Argo AT Series - Troubleshooting - Flowchart#4; Low Water Cut-off and Flow Switch Diagnosis

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TROUBLESHOOTING - FLOWCHART#4
"AT" SERIES BOILER DIMENSIONS
A
B
C
D
E
Remove jumper from
LWC-LWC and replace
LWC-LWC leads.
OK
Check water supply and
water level in system. Fill
system if low. Does visual/
audible alarm shut off with
system full?
OK
OK (From
Flowchart#3)
Yes
A
No
B
Remove jumper from
ow-ow and replace leads.
No
OK
C
Potentially bad ow switch.
Check wiring to ow switch
and consult ow switch
manufacturer if necessary.
Yes
Potentially bad low water
cut-off. Check wiring to
LWCO and consult LWCO
manufacturer if necessary.
No
Check pump and ow
rate of system. Pump may
require replacement. Does
visual/audible alarm shut off
with a new pump?
No
Yes
Yes
Dimensions
Inlet & Outlet
Pipe Size
Approximate
Shipping Wt.
A B C D E
14-5/8” 18-5/8 “ 9-1/32” 14-3/8” 16-15/32” 1-1/4” NPT 70 lbs.
Does visual/audible alarm
shut off with jumper in-
stalled?
Does visual/audible alarm
shut off with jumper installed?
Remove leads from
ow-ow and test with a
jumper.