23
(Type K x 94mm)
Fig. 23. Electro Oil Inter B20B Burner.
(50/70 model).
Combustion Head
(PL 21.5/10)
Output
Fuel
Dimension (mm)
kW
A
B
50
28sec. Kerosene
24
10
60
28sec. Kerosene
26
10
70
28sec. Kerosene
28
10
50
35sec. Gas Oil
20
8
60
35sec. Gas Oil
22
8
70
35sec. Gas Oil
24
8
13.1
Hand the users instructions and Benchmark book-
let to the user or purchaser for retention and instruct them in the
efficient and safe operation of the appliance and the heating/hot
water system.
13.2
Advise the user or purchaser of the precautions necessary
to prevent damage to the heating/hot water system and to the
building in the event of the heating system remaining
inoperative during frost conditions.
13.3
Finally advise the user or purchaser that for continued
efficient and safe operation of the appliance it is important that
adequate servicing is carried out by a qualified engineer at least
once per year.
Worcester, Bosch Group will be pleased to discuss and offer a
comprehensive maintenance contract.
13.4
Set the system controls to the users requirements.
14.1
The following should be carried out at least once per year
for 28 second Kerosene and twice per year for 35 second Gas Oil,
to ensure efficient, trouble free operation.
1.
Carry out a pre-service check noting any operational faults.
2.
Check and clean the burner.
3.
On the CF model check and clean the air intake grille located
in the boiler room.
4.
On the RS balanced flue model check and clean the air intake
ducts at the rear and underneath the boiler and the air intake
grille at the end of the terminal.
5.
Check and clean the baffle retainer (20/25, 26/32, 32/50 and
50/70 models).
6.
Check and clean the cap retainer (32/50 and 50/70 models).
7.
Check and clean the baffles.
8.
Check and clean the heat exchanger surface.
9.
Check the heat shield (20/25, 26/32, 32/50 and 50/70
models).
10.
Check the combustion chamber base insulation board.
11.
Check that the flue system is unobstructed and clean as
necessary.
12.
If the appliance has been installed in a compartment check
that the ventilation areas are clear.
13.
Clean all oil filters.
Some of the servicing points are covered more fully in the
following instructions:-
14.2 Pre-Service Check
1.
Remove the cabinet front and top panels as described in
section 5 .
2.
On the RS balanced flue model remove the burner box cover
as described in Section 5.5.
3.
Operate the appliance and system, noting any faults which
may need to be corrected during the service.
14.3 Cleaning the Burner
IMPORTANT:
Disconnect the electrical supply at the mains
before commencing any servicing. Turn off the oil at the service cock.
1.
Remove the burner.
Conventional Flue Appliance (CF/LLD).
(a) Isolate the oil supply at both the oil tank and the isolating
valve located close to the burner.
(b) Slacken the two M6 burner locking screws, using a 5mm
Allen key, and remove the burner.
Room Sealed Balanced Flue Appliance (RS).
(a) Isolate the oil supply at both the oil tank and the isolating
valve situated above the burner on the right-hand side.
(See Fig. 3).
14. Routine Cleaning And Inspection
13. Instructions To The User
