Warning – Crown Boiler TWZ175 User Manual
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23) Check for clean cutoff of the burner. Air in the oil line between fuel pump and nozzle will compress, while burner is
running, and expand, when burner shuts off, causing oil line pressure to drop and nozzle drip after burner stops. Cycle burner
on and off 5 to 10 times to purge air completely.
24) Check thermostat operation by raising or lowering its set point as required, cycling burner on and off.
25) Verify primary control operation and safety features according to procedure outlined in the instructions furnished with
control.
26) Check high limit control operation. Jump thermostat terminals and allow burner to run until boiler water temperature
exceeds high limit setting. The burner should shut down, and circulator continue running. Allow the temperature to drop
below the control setting. The burner must restart. Boiler installation is not complete unless these checks are made and are
satisfactory. Remove thermostat jumper and reconnect thermostat upon check completion.
27) After the boiler has operated for approximately 30 minutes, check the boiler and heating system for leaks. Repair any
leaks found at once.
After the above checks have been completed, leave thermostat(s) at desired setting. Leave all instructions provided with the
boiler with owner or in boiler room, displayed near boiler.
taBlE 3a: BEcKEtt BurnEr cOnFIGuratIOn anD sEtuP Data
TWZ065 TWZ075 TWZ100 TWZ090 TWZ125 TWZ150 TWZ120 TWZ175 TWZ200
BURNER MODEL
AFG
AFG
AFG
AFG
AFG
AFG
AFG
AFG
AFG
AIR TUBE COMBO.
70MMAQ 70MMAQ 70MMAQ 70MMAQ 70MDAQ 70MDAQ 70MLAQ 70MLAQ 70MLAQ
HEAD TYPE
L1
L1
L1
L1
V1
V1
V1
V1
V1
3 3/8
3 3/8
3 3/8
3 3/8
2 3/4
2 3/4
NONE
NONE
NONE
INSERTION LENGTH
2 1/4
2 1/4
2 1/4
2 1/4
2 1/4
2 1/4
2 1/4
2 1/4
2 1/4
PITCH ANGLE
2
2
2
2
2
2
2
2
2
STANDARD
HAGO
HAGO
HAGO
DEL.
HAGO
HAGO
HAGO
HAGO
HAGO
NOZZLE
0.55/60B 0.65/60B 0.85/60B 0.75/60B 1.00/60B 1.25/60B 0.90/60B 1.35/45B 1.50/45B
ALTERNATE
DEL.
DEL.
DEL.
HAGO
DEL.
DEL.
DEL.
DEL.
DEL.
NOZZLE
0.55/60W 0.65/60W 0.85/60W 0.75/60B 1.00/60B 1.25/60B 0.90/60B 1.35/45B 1.50/45B
PUMP PRESS (psi)
140
140
140
140
140
140
175
175
175
HEAD SETTING
NA
NA
NA
NA
0
0
0
3
4
STARTING:
SHUTTER SETTING
1
10
5
7
10
10
8
6
8
BAND SETTING
1
2
2
0
0.5
6
1
6
4
DRAFT OVER FIRE
(in w.c.)
MAX. SMOKE
(bacharach scale)
FLUE CO2 (%)
MIN.
11.0
11.0
11.0
11.0
11.0
11.0
11.0
11.0
11.0
MAX
12.5
12.5
12.5
12.5
12.5
12.5
12.5
12.5
12.5
#1
-0.02
-0.02
#1
#1
#1
#1
#1
#1
#1
#1
-0.02
-0.02
-0.02
-0.02
-0.02
-0.02
-0.02
NONE
NONE
NONE
NONE
NONE
NONE
NONE
STATIC PLATE
LOW FIRING RATE
BAFFLE
BECKETT
#3708
BECKETT
#3708
BOILER MODEL
WARNING
ATTEMPTS TO USE BURNERS OR BURNER CONFIGURATIONS OTHER THAN
THOSE SHOWN IN TABLE 3 COULD RESULT IN RELIABILITY PROBLEMS,
PROPERTY DAMAGE OR UNSAFE OPERATION.