CleaverBrooks CBT - Page 82

Maintenance
5-14
750-382
CBT
Check blowdown valve
positions.
All blowdown valves
should be closed
during operation,
except during active
blowdown proce-
dures. Close any blow-
down valves that may
be open.
B.2. Feed Water (FW)
pump is not running,
water level is low
Check for power to FW
pump
If no power present --
connect power/replace
fuses as needed
Open boiler control
panel and check pump
relay LED ("H/L
RELAY") on the War-
rick LLCO/Level con-
trol board
If LED is off, see Possi-
ble Cause B.4. Water
Level Probe connec-
tions; if LED is on,
check pump control
wiring from boiler to
pump contactor/starter.
Manually enable pump
starter to "bump" pump
motor.
If pump motor does not
operate, repair or
replace pump and/or
motor.
B.3. Feed Water (FW)
pump is running, but
boiler water level is low
Check water flow to
boiler
Open valves, remove
restrictions
Listen for FW pump
cavitation noise and
check feed tank tem-
perature
If FW temperature is
greater than 180F,
check steam traps.
Service steam traps as
needed.
Check blowdown valve
positions.
All blowdown valves
should be closed,
except during active
blowdown proce-
dures. Close any blow-
down valves that may
have been left open.
Check pump seals and/
or impeller
Service/replace FW
pump as needed.
For 3 phase power only
-- check pump rotation
If incorrect pump rota-
tion, swap 2 of the 3
incoming 3-phase
power wire connec-
tions to pump starter/
contactor
B.4. Water Level Probe
connections
Check Warrick board
connections in boiler
control panel
Secure any loose con-
nections
Problem Display Message Possible Cause/Symp-
tom
Diagnostic Check Corrective Measures