Reflect-O-Ray
®
EDS-4DI & EHS-4DI
Installation, Operation & Service
Combustion Research Corporation
Page 43
Is there 120 volt power to
the primary side of burner
transformer?
Is there 24 volts on the
secondary side of
transformer?
Is there 24 volt power at
the ignition control?
Locate the source of the
electrical problem.
Replace Transformer.
NO
YES
NO
Is there 24 volts to the
pressure switch?
Is the vent pipe, air inlet
or blower wheel blocked
or obstructed?
YES
Is there 24 volts through
the 2 amp fuse?
Are the air hoses connected
to the pressure switch leak
free and secure?
NO
Repair and replace
hoses as needed.
Are the caps securely
installed on the vacuum
test ports?
YES
NO
Replace or install as
needed.
Is the system vacuum set
in accordance with this
manual?
Replace 2 amp fuse.
Clear all obstructions and
clean exhauster wheel.
YES
Is there 24 volts to the
ignition control?
YES
Replace pressure
switch
Adjust and set vacuum to
specifications.
YES
NO
NO
NO
NO
YES
YES
NO
Place a TEMPORARY
jumper wire across there
terminals on the pressure
switch.
Is there 24 volts to the
ignition control?
NO
YES