Worcester GREENSTAR UTILITY 32/50

INSPECTION AND SERVICE
Fire valve:
Check that the oil supply pipe has a fire valve
fitted externally to the building with the fire
valve sensor located within the appliance
case. A fire valve sensor clip is provided for
this purpose on the casing support panel.
Re-commission the burner:
1 Sterling burner:
Align burner combustion head (N) into boiler
housing tube with gasket (O) correctly fitted.
 Push firmly down to compress the gasket (O).
 Tighten burner retainers (H) sufficiently to
ensure a good seal.
1aRiello burner:
Align burner combustion head (N) into
boiler housing tube flange (O).
 Secure with retaining nut (H).
 Tighten retaining nut 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
from the combustion chamber into the room.
2Plug burner lead (K) into control box (D).
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
2
if necessary using the air shutter.
When the combustion is correct turn off the
boiler, remove the pressure gauge and refit
the blanking plug.
Refit panels:
3Locate edge of front panel (A) onto
supporting ledge (B) on the baseplate.
Secure with screws (C).
4Slide control box (D) into the boiler.
Secure with screws (E).
Locate ball stud connectore (F) and push-fit
upper front panel (G) towards the boiler to
secure.
If the data label plate has been removed
ensure it is refitted to the appliance.
5Locate the top panel (H) onto the ball stud
connections ( J ) and press down to secure.
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.
%CO
2
NOMINAL BOILER RATING AT NORMAL OPERATING TEMPERATURE
USING 28sec KEROSENE:
NOZZLE
OIL
PUMP
PRESSURE
(p.s.i.)
FUEL
FLOW RATE
Kg/h l/h
COMBUSTION
HEAD
SETTING
APPROX.
AIR
SETTING
APPLIANCE
INPUT OUTPUT
kW Btu/hr kW Btu/hr
Bentone Sterling 146 Burner (50/70kW):
1.25 45° S
1.50 45° S
2.00 45° S
14 5/15 0
14 5/15 0
110 /135
4.33
5.2
6.05
5.48
6.58
7.66
80
85
90
12.0
12.0
12.0
6.0
9.0
13.0
50
60
70
52.1
62.5
72.9
Bentone Sterling 133 Burner (32/50kW):
0.85 60°ES
1 .10 45 ° S
1.25 45° S
150/-
120/-
155/-
2.78
3.55
4.33
3.52
4.49
5.48
75
85
95
11.5
12 . 0
12 . 5
2.0
4.0
8.0
114000
146000
178000
178000
213000
249000
32
41
50
110000
140000
170000
33.4
42.7
52.1
N/A
N/A
N/A
APPROX
FLUE
GAS
TEMP.
( °C )
N/A
N/A
N/A
170000
205000
240000
Riello RDB 4.2 (50/70):
1.25 60° S
1.50 45° S
2.00 45° S
145
14 5
12 5
4.33
5.2
6.05
5.48
6.58
7.66
80
80
86
12.0
12.0
12.0
2.5
5
4.5
50
60
70
52.1
62.5
72.9
Riello RDB 3.2 (32/50):
1.0 60°ES
1 .10 60 ° S
1.35 60° S
100
130
135
2.78
3.55
4.33
3.52
4.49
5.48
75
77
85
11.5
12 . 0
12 . 5
3.0
4.5
5.5
114000
146000
178000
178000
213000
249000
32
41
50
110000
140000
170000
33.4
42.7
52.1
3
4
5
1
2
3
170000
205000
240000
INSPECTION AND SERVICE
INSTALLATION & SERVICING INSTRUCTIONS FOR WORCESTER GREENSTAR UTILITY 32/50 & 50/708 716
109 711B 07.2010
43
SERVICING
& SPARES
8 716 109 711 b 07.10 14/7/10 09:59 Page 43