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Contents
,
1.
Instailation Requirements............................................. Page 2
2.
General Information...................................................... Page 2
3.
Technical Data................................................................ Page 4
4.
Siting the Appliance...................................................... Page 5
5.
Siting the Flue Terminal................................................ Page 6
Sa. Vertical Flue System .................................................. .... Page 6
6.
Air Supply .............................................. ......................... Page 7
7.
Sealed System .. ..... ... ...... .. .......... .. ... .. .. .. ... .... .... .......... .... Page 7
8.
Open Vent Primary Water System ............................... Page 8
,
1 . Installation Regulations
1.1
Gas Safety (Installation and Use) Regulations 1984
Ail gas appliances must be instailed by a competent person in
accordance with the above regulations. Failure to instaii appli·
ances correctly could lead to prosecution.
1 .2
The manufacturers notes must not be taken,in any way,as
overriding statutory obligations.
1.3
The compliance with a British Standard does not, of itself, con·
fer immunity from legal obligations. In particular the instaiiation
of this appliance must be in accordance with the relevant require·
ments of the Gas Safety (Installation and Use) Regulations 1984 as
amended, current lEE Wiring Regulations, local Building Regula·
tions, Building Standards (Scotland)(Consolidation) and byelaws of
the local Water Company. Health and Safety Document No. 635
(Electricity at Work Regulations). It should be in accordance with
the relevant recommendations of the following British Standards.
BS 6798:1987 Specification for installation of gas fired hot water
boilers of rated input not exceeding 60 kW.
BS 5449:1990 Central Heating for Domestic Premises.
BS 5546:1990 Installation of gas hot water supplies for domes·
tic purposes.
BS 5440:1 :1990 Flues and Ventilation for gas appliances of rated
input not exceeding 60 kW: Flues.
BS 5440:2:1989 Flues and Ventilation for gas appliances of rated
input not exceeding 60kW: Air Supply.
BS 6891 :1 988 Installation of low pressure gas pipework instaila·
tions up to 28 mm (R 1 ).
1 .4
To ensure that the instaiiation will perform to the highest
standards, the system and components should conform to any
other relevant British Standards in addition to those mentioned
in the instructions.
0
2. General Information
2.1
This appliance is not suitable for external instaiiation.
2.2
The appliance controls are set to provide a maximum out·
put of 24 kW for the domestic hot water and a central heating
load of up to 16.1 kW.
2.3
The control circuit provides automatic ignition. A permanent
pilot is not used.
2.4 PRINCIPLE APPLIANCE COMPONENTS See Fig 1.
A low thermal capacity Gas to Water heat exchanger.
A Wnter to Water heat exchanger to provide domestic hot water.
Fully modulating controls in the central heating and domestic
hot water modes of operation.
An expansion vessel, pressure gauge and pressure relief valve.
A by·pass for the central heating system.
Temperature safety cut·out controls.
2
9.
Domestic Hot Water ................ ...................................... Page 9
1
11 . Instaiiation ...................... ............................................... Page 13
12. Commissioning .......... .................................................... Page 18
13. Instructions to the User ....................... ......................... Page 19
14. Inspection and Servicing ...................... ........................ Page 20
15. Replacement of Parts.................................................... Page 22
16. Short Parts List ........................ ...................................... Page 29
17. Operational Flow Diagram ............... :............................ Page 30
18. Fault Finding ................................................................... Page 32
A water flow regulator.
A standard horizontal flue assembly giving flue lengths from
1 00 mm to 1 000 mm.
An optional extra extension flue kit to provide for flue lengths
up to 2000 mm long.
An optional vertical flue system.
An optional facia mounted programmer instead of the standard
Operating Switch.
2.5 ELECTRICAL SUPPLY
Mains supply: 240V
~,
50 Hz, 270 watts. External fuse 3A.
Internal fuses: T2A (F1) and T315mA (F2).
2.6 GAS SUPPLY
The boiler requires 2.81 m
3
/h (99.3
ft
3
/hr) of gas. The gas meter
and supply pipes must be capable of supplying this quantity of
gas in addition to the demand from any other appliances being
served. The table below gives an indication of limiting gas pipe
lengths and the allowance to be made for fittings. Refer to
BS6891 for further information.
The meter governor should deliver a dynamic pressure of 20
mbar (Sin wg.) at the appliance, equivalent to a pressure of
about 18.5·19 mbar at the gas valve.
The complete installation, including the gas meter, must be test·
ed for soundness and purged. Refer to BS 6891 .
TOTAL LENGTH OF
GAS SUPPLY PIPE (metres)
Pipe
Diameter
3
6
9
(mm)
Gas Discharge Rate (m3/h)
2.9
-
-
15
8.7
5.8
4.6
22
18.0
12.0
9.4
28
Note:
Each fitting used in the gas line from the meter is equivalent to a
length of straight pipe which must be added to the straight pipe
length to give the total length.
ie: Elbow
=
0.5 metres, Tee
=
0.5 metres, 90° Bend
=
0.3 metres.
2.7 PACKING
The appliance and flue components are packed in separate car·
tons.
2.8 GENERAL INSTALLATION
The appliance is supplied for connection to a sealed system but
is suitable for use with an open vent system. The connections
are supplied as an optional kit.
The specified ventilation openings made into a wall or compart·
ment door must not be obstructed.
If the appliance is to be fitted into a compartment then the com·
partment must conform to the requirements of BS 6798: 1987:
Section 6.
Do not place anything on top of the appliance.
The clearances specified for servicing must be maintained.
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