Starting The Appliance Bentone Sterling Burners - Worcester GREENSTAR UTILITY 32/50 Instruction Manual

8 716 109 711 b 07.10 14/7/10
NOMINAL BOILER RATING AT NORMAL OPERATING TEMPERATURE
USING 28sec KEROSENE:
FUEL
OIL
PUMP
NOZZLE
FLOW RATE
PRESSURE
(p.s.i.)
Kg/h
B entone Sterling 133 Burner (32/50kW):
0.85 60°ES 150/- 2.78 3.52
1.10 45 ° S
120/- 3.55 4.49
1.35 45° S 155/- 4.33 5.48
Bentone Sterling 146 Burner (50/70kW):
1.25 45° S 145/150 4.33 5.48
1.50 45° S 145/150 5.2 6.58
2.00 45° S 110/135 6.05 7.66
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR UTILITY 32/50 & 50/708 716
109 711B 07.2010
09:59 Page 35
APPROX
APPROX.
COMBUSTION
FLUE
%CO
AIR
GAS 2 HEAD
SETTING
TEMP. SETTING
l/h
( °C )
N/A
75 11.5 2.0
85 12.0 4.0 N/A
95 12.5 8.0 N/A
N/A
80 12.0 6.0
N/A
85 12.0 9.0
90 12.0 13.0 N/A
STARTING THE APPLIANCE
BENTONE STIRLING BURNERS
2 Fit a suitable pressure gauge to port (A) on
the oil pump.
Adjust the air shutter (F) and pump pressure
(B) as shown in the table below. The
burner should ignite following a pre-ignition
period of approx. 15 seconds.
Boiler lockout indicator on:
If the burner fails to establish a normal firing
pattern or flame failure occurs the flame
monitoring photocell mounted in the burner
body will alert the burner control box to shut
the burner down and provide a safe lockout
state indicated by the illumination of the lock-
out indicator/reset button (E).
Wait 2 minutes then press the lockout
indicator reset button (E) to initiate another
start sequence.
Repeat procedure until a flame is established.
3 Start and run for 3 minutes then switch off.
Check for after-spurting from the nozzle,
indicated by oil saturation on the combustion
head (G).
If after-spurting occurs:
Release the burner retainers (H).
Remove the burner, combustion head (G).
and electrodes, hold the burner vertical
to unscrew the nozzle (K) and fill the nozzle
holder ( J ) with kerosene.
Refit nozzle (K), electrodes, combustion
head (G) and the burner.
Restart and run for 3 minute intervals until
after-spurting stops.
4 Start and run for 20 minutes.
Remove sampling point plug ( L ) to check
the smoke reading is between 0-1. If the
smoke level is above 1, check the combustion
settings are correct and the oil nozzle is in
good condition.
NOTE: smoke readings may be inaccurate
until the smoke from burning organic binder in
the access door insulation has ceased.
Check the CO
shutter (F) setting according to the table
opposite.
Check the flue gas temperature is close to
the values shown in the table.
If the flue gas temperature is too high and the
baffles are correctly fitted, then reduce the oil
pump pressure (B) 5-10p.s.i. to compensate
for nozzle variations.
Turn off the electrical supply.
Isolate the oil supply to the burner.
Remove the oil pressure gauge.
Refit the blanking plug (A).
APPLIANCE
Check and rectify any oil leaks.
INPUT OUTPUT
5 Switch on the oil supply.
kW Btu/hr kW Btu/hr
Switch on the electrical supply.
Restart the boiler and run for 5 minutes.
Recheck the CO
33.4 114000 110000
adjust the air shutter setting (F) to obtain
the correct CO
42.7 146000 41 140000
Repeat the fine tuning procedure (5) if required.
52.1 178000 50 170000
Refit the sample point cap (L)(hand tighten
only, do not over tighten).
178000 170000
52.1 50
62.5 213000 60 205000
72.9 249000 70 240000
levels and adjust the air
2
levels and if required,
2
level.
2
STARTING THE APPLIANCE
BENTONE STERLING BURNERS
35