Bosch 12/18 Instruction Manual page 41

F
E
NOMINAL BOILER RATING AT NORMAL OPERATING
TEMPERATURE USING 28sec KEROSENE:
OIL PUMP FUEL APPROX.
NOZZLE
PRESSURE FLOW RATE FLUE GAS
TEMP °C
(p.s.i.)
Kg/h l/h
12/18 - Bentone Sterling 40 Burner:
115 1.04 1.32
0.35 80°SR
115 1.29 1.63
0.45 80°S
0.50 80°ES 140 1.55 1.96
18/25 - Bentone Sterling 50 Burner:
130 1.56 1.98
0.50 80°EH
145 1.86 2.36
0.55 80°EH
150 2.17 2.75
0.65 80°EH
25/32 - Riello RDB Burner:
105 2.15 2.72
0.75 60°ES
0.75 60°ES 140 2.45 3.1
150 2.75 3.48
0.85 60°ES
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR HEATSLAVE EXTERNAL 12/18-18/25-25/32
8 716 113 389b (09/07)
B
A
C
D
APPROX.
%CO AIR
INPUT
2
SETTING
kW
66 11.5 2.5 12.4 42300
70 12.0 4.5 15.5 52900
73 12.5 5.25 18.6 63500
72 11.5 4.25 18.6 63500
79 12.0 6.0 22.2 75750
82 12.5 8.0 25.8 88000
87000
78 11.5 3.0 25.5
99300
80 12.0 4.0 29.1
83 12.5 5.0 32.7 111600
INSPECTION AND SERVICE
Re-commission the burner:
1 Align burner combustion head (A) into the
boiler housing tube with gasket (B)
correctly fitted.
Push firmly down to compress the gasket (B).
Tighten burner retainers (C) sufficiently to
ensure a good seal.
IMPORTANT:
Ensure the gasket is a good seal between
the burner combustion head and the boiler
housing to prevent flue gases escaping.
Refit flexible air duct and secure with clip (D).
2 Plug burner lead (E) into control box (F).
Connect an oil pressure gauge to the oil
pump, run the burner and check the oil
pressure is correct for the required boiler
output. Check that the smoke reading is
between 0 and 1, if the smoke reading is
above 1 check the air setting. If the air
setting is correct check that the burner has
been reassembled correctly.
Allow the boiler to warm up then check the
combustion settings are correct as
indicated in the table below, adjust the
CO
When the combustion is correct turn off the
boiler, remove the pressure gauge and refit
the blanking plug and plastic cover.
Refit panels:
3 Refit the top panel and press down to
compress the seal when fitting the
securing screws.
Push the front panel up behind the top
panel and push in at the base to secure
the screws with the tool provided.
After service handover:
Make a note of the date of any water treatment.
Set the controls back to the users
requirements.
Complete the service interval record at the
back of this manual and a CD11 or an
equivalent form.
If the appliance is unused and exposed to
freezing conditions; shut off all the mains
supplies, isolate the boiler and drain the
system and boiler, including the secondary
heat exchanger.
APPLIANCE
OUTPUT
Btu/hr kW Btu/hr
12 40900
15 51200
18 61400
18 61400
21.5 73400
25 85300
25 85300
28.5 97200
32 109200
if necessary using the air shutter.
2
INSPECTION AND SERVICE
40