Crown Boiler BWF162 Manual De Usuario
44
120 volts across
black and white
transformer
primary leads on
back of R8285 ?
Thermostat
calls for heat
Circulator
start?
* Power off
* Blown fuse or
tripped breaker
* Miswired or
loose electrical
connection in
120 volt line
* Blown fuse or
tripped breaker
* Miswired or
loose electrical
connection in
120 volt line
120 volts across
circulator
connections?
* Loose connection in
t'stat or zone valve end
switch wiring
* Defective t'stat or zone
valve end switch
* T'stat or zone system
miswired-consult zone
valve or t'stat
manufacturer's
instructions.
t'stat or zone valve end
switch wiring
* Defective t'stat or zone
valve end switch
* T'stat or zone system
miswired-consult zone
valve or t'stat
manufacturer's
instructions.
N
Induced
draft fan
start?
120 volts
present?
24 volts present
across yellow
and orange
connections on
R8222?
* Boiler off on
high limit
* Defective
high limit
high limit
* Defective
high limit
* Defective
R8222 relay -
see note 6 on
page 43.
* Socket not fully
seated on relay
R8222 relay -
see note 6 on
page 43.
* Socket not fully
seated on relay
Y
Y
N
N
Y
N
Y
N
START
Y
N
Y
24volts across R
and C on R8285
and C on R8285
fan center?
* Defective
transformer.
Replace R8285.
See note 5 on
page 43
transformer.
Replace R8285.
See note 5 on
page 43
24 volts across
G and C on
R8285 fan
center?
* Seized or
defective
circulator
defective
circulator
* Defective relay on
R8285 - see note 6 on
page 43
* Relay not fully seated
in socket
* Loose connection in
circulator wiring
R8285 - see note 6 on
page 43
* Relay not fully seated
in socket
* Loose connection in
circulator wiring
Unplug fan and
check for 120 volts
across black and
white connections
on female half of
plug.
check for 120 volts
across black and
white connections
on female half of
plug.
* Loose
connection at
fan plug or fan
capacitor
* Defective
capacitor
* Defective fan
connection at
fan plug or fan
capacitor
* Defective
capacitor
* Defective fan
24 volts
present across
yellow and
purple
connections on
R8222?
Reconnect fan
* Kinked or blocked
vacuum switch tubing
* Defective vacuum
switch
vacuum switch tubing
* Defective vacuum
switch
Wait 30-50
seconds
(prepurge)
Continued on
next page
N
Y
N
Y
N
Y
BWF Troubleshooting Chart
Caution: Read page 43 before attempting to use this chart