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Contents
1.
Installation Requirements .......................................... Page 2
2.
General Information .................................................... Page 2
3.
Data Tables .................................................................... Page 5
4.
Siting the Appliance .................................................... Page 8
5a. Flue Terminal Position ................................................ Page 8
5b. Flue Options .................................................................. Page 8
5c. Vertical Flue .................................................................. Page 10
6.
Air Supply .................................................................... Page 10
7.
Sealed System .............................................................. Page 11
8.
Open Vent System ...................................................... Page 12
1. Installation Requirements
1.1 Gas Safety (Installation and Use) Regulations 1994 as
Ammended in 1996: All gas appliances must be installed by a
competent person in accordance with the above regulations.
Failure to install appliances 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,
confer immunity from legal obligations. In particular the
installation of this appliance must be in accordance with the
relevant requirements of the following: Gas Safety (Installation
and Use) Regulations 1994 (as Amended in 1996), current IEE
Wiring Regulations, local Building Regulations, Building
Standards (Scotland) (Consolidation), byelaws of the local Water
Company and Health and Safety Document No. 635 (Electricity
at Work Regulations 1989). The British Gas Material and
Installation Specification for central heating and hot water. 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 domestic
purposes.
BS 5440:1:1990 Flues and Ventilation for gas appliances of rated
input not exceeding 60kW: Flues.
BS 5440:2:1989 Flues and ventilation for gas appliances of rated
input not exceeding 60kW: Air Supply.
BS 6891:1988 Installation of low pressure gas pipework
installations up to 28mm (R1)
1.4 To ensure that the installation 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.
1.5 The appliance complies with the Essential Requirements of
the Gas Appliance Directive and other Directives currently
applicable.
1.6 This appliance contains no asbestos products. There is no
potential hazard due to the appliance being electrically unsafe.
There are no substances used that are a potential hazard in
relation to the COSHH Regulations 1988.
2. General Information
2.1 This appliance is not suitable for external installation.
2.2 The appliance controls are set to provide a maximum output
of 24 kW for the domestic hot water and a central heating load
of up to 24 kW.
9.
Domestic Hot Water Supply ...................................... Page 13
10.
Electrical ...................................................................... Page 14
11.
Installing the Appliance ............................................ Page 16
12.
Commissioning the Appliance .................................. Page 31
13.
Instructions to the User ............................................ Page 33
14.
Inspection and Service .............................................. Page 33
15.
Replacement of Parts ................................................ Page 34
16.
Operational Flow Diagrams ...................................... Page 48
17.
Fault Finding ................................................................ Page 50
18.
Component Parts List ................................................ Page 55
2.3 The control circuit provides automatic ignition. A permanent
pilot is not used.
2.4 PRINCIPLE APPLIANCE COMPONENTS.
A low thermal capacity Gas to Water heat exchanger
A water to water heat exchanger to provide domestic hot water.
A heatbank having a nominal capacity of 60 litres of circulating
primary hot water positioned in the lower half of the appliance.
A water diverter valve to direct the boiler output either to
domestic hot water or central heating as required.
Multifunctional gas valve and electrical control system to
individually control the domestic hot water and central heating.
An integral circulating pump.
Boiler and hot water temperature control thermostats providing
control for central heating and domestic hot water.
A User's Operating Switch for selection of water only or heating
and water.
A by-pass for central heating system.
An electronic control board which enables the pump to run on
for a period of about five minutes to allow the boiler section to
cool after each operating cycle.
An expansion vessel, pressure gauge and pressure relief valve.
Temperature safety cut-out controls.
An optional extra facia mounted programmer.
A water flow regulator and flow switch in the domestic supply.
A standard horizontal rear flue kit to accommodate a flue length
of 100 mm to 500 mm
Alternatively, a standard horizontal side flue kit to accommodate
a flue length of 100 mm to 1000 mm.
Optional extra flue kits to provide for flue lengths up to a
maximum of 3000 mm.
Optional extra 90° flue bends to redirect the flue to the right, left
or upwards.
N.B. Maximum flue length reduces when a flue bend or bends
are fitted .
An optional vertical balanced flue system.
2.5 ELECTRICAL SUPPLY.
Mains supply: 230V ~ 50Hz, 270watts. External fuse 3A.
Internal fuse 3.15A (20mm) fast blow.
2.6 GAS SUPPLY.
The boiler requires 2.8 m
value of 38.7 MJ/m
3
. (1038 Btu/h.) 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 following table 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
20mbar (8in wg.) at the appliance.
2
3
/h ( 98.5 ft
3
/hr ) of gas with a calorific
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