4
xtra
-
Installation & Servicing
GENERAL
INTRODUCTION
The
xtra
boilers are fully automatically controlled, floor
standing, fanned, super efficient condensing appliances.
The comprehensive boiler controls built into the appliance
include:
-
Volt free 'alarm' contacts (lockout)
-
Volt free 'boiler run' contacts
-
Burner hours run meters
-
System temperatures
The boilers can draw their combustion air from the room or via
ducting from outside.
Through a sophisticated control system combined with premix
burner technology and an aluminium heat exchanger, the boilers
are capable of high operating efficiencies of 93% (gross) and
low emissions.
These boilers are certified to meet the requirements of the EC
Gas Appliance Directive, Boiler Efficiency Directive, EMC and
Low Voltage Directive.
OPTIONAL EXTRA KITS
•
BMS (0-10V) Kit
•
Control Interface Kit
•
DHW Sensor Kit
•
Modulating Sequencer Kit
•
Outside Sensor Kit
•
Room Sensor Kit
•
Tank Sensor Kit
SAFETY
Current Gas Safety (Installation and Use) Regulations
or rules in force
The appliance is suitable only for installation in GB and IE and
should be installed in accordance with the rules in force.
In GB, the installation must be carried out by a CORGI
Registered Installer or in IE by a competent person. It must be
carried out in accordance with the relevant requirements of the:
•
Gas Safety (Installation and Use) Regulations
•
The appropriate Building Regulations either The Building
Regulations, The Building Regulations (Scotland), Building
Regulations (Northern Ireland).
•
The Water Fittings Regulations or Water byelaws in
Scotland.
•
The Current I.E.E. Wiring Regulations.
Where no specific instructions are given, reference should be
made to the relevant British Standard Code of Practice.
In IE, the installation must be carried out by a Competent Person
and installed in accordance with the current Building
Regulations and reference should be made to the current ETCI
rules for electrical installation.
The boilers have been tested and certified by Gastec to EN483
and EN677 for use with Natural Gas.
Detailed recommendations are contained in the following
Standards and Codes of Practice:
BS. 5854
Flue and flue Structures in Buildings.
BS. 6644
Installation of gas fired hot water boilers of
rated inputs between 70kW and 1.8MW (net)
(2nd and 3rd family gases).
BS. 6880
Low temperature hot water heating systems of
output greater than 45kW.
Part 1
Fundamental and design considerations.
Part 2
Selection of equipment.
Part 3
Installation, commissioning and maintenance.
IGE/UP/1
Soundness testing and purging of industrial
and commercial gas installations.
IGE/UP/2
Gas installation pipework, boosters and
compressors on industrial and commercial
premises.
IGE/UP/10
Installation of gas appliances in industrial and
commercial premises.
SAFE HANDLING OF SUBSTANCES
No asbestos, mercury or CFCs are included in any part of the
boiler or its manufacture.
FOUNDATION / LOCATION OF BOILER
The boiler must stand on a floor which must be flat, level and of
a suitable load bearing capacity to support the weight of the
boiler (when filled with water) and any ancillary equipment.
Ideally the boiler should be placed on a plinth exceeding the
plan area of the boiler by 75mm on each side and at least
100mm high.
The boiler must not be fitted outside.
GAS SUPPLY
The local gas supplier should be consulted, at the installation
planning stage, in order to establish the availability of an
adequate supply of gas. An existing service pipe must NOT be
used without prior consultation with the local gas supplier.
A gas meter can only be connected by the local gas supplier or
by a registered CORGI engineer or in IE by a competent person.
An existing meter should be checked, preferably by the gas
supplier, to ensure that the meter is adequate to deal with the
rate of gas supply required. A minimum working gas pressure
of 15mbar MUST be available at the boiler inlet for Natural gas.
Do not use pipes of smaller size than the boiler inlet gas
connection.
The complete installation MUST be tested for gas soundness
and purged in accordance with the appropriate standards.
Gas Boosters
A gas booster is required if the gas pressure available at the
boiler is lower than that required by the boiler manufacturer to
attain the flow rate for maximum burner input rating.
Location of the booster requires careful consideration but
should preferably be closer to the burner rather than the gas
meter. Ventilation should also be considered to ensure ambient
temperature do not exceed designed recommendations.
Further guidance is provided in IGE/UP/2.
FLUE INSTALLATION
IMPORTANT.
It is the responsibility of the installer to ensure, in
practice, that products of combustion discharging from the
terminal cannot re-enter the building or any other adjacent
building through ventilators, windows, doors, other sources of
natural air infiltration, or forced ventilation / air conditioning.
If this should occur the appliance MUST be isolated from the
gas supply and labelled as 'unsafe' until corrective action can be
taken.
Terminal Position
Due to the high efficiency of the boilers pluming will occur.
Vertical termination is recommended and terminal positions
which could cause problems should be avoided. Particular care
should be taken in the case of large output boiler installations,
and complying with the requirements of the Clean Air Act.
The flue must be installed in accordance with the appropriate
Building Regulations and standards listed on page 4 and in
compliance with BS6644. In IE refer to I.S.820:2000.
