4
xtra
-
Installation & Servicing
GENERAL
INTRODUCTION
The
xtra
boilers are fully automatically controlled, floor
standing, fanned, super efficient condensing appliances.
The imax xtra comprises of 2 modules, Master and Slave.
The comprehensive boiler controls built into the appliance
include:
-
0-10V Boiler control input
-
Volt free 'alarm' contacts (lockout)
-
Volt free 'boiler run' contacts
-
Burner hours run meters
-
System temperature indication
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
•
Modulating Sequencer
- DHW Sensor
- Room Sensor
•
Programmable Room Stat
•
Outside Sensor
(only suitable for use in conjunction with Prog. Room Stat)
•
Water and Gas Header Pack
•
RS Air Duct Connector
(F320 and F400 only)
•
Horizontal Flue Header
*
•
Vertical Flue Header
*
* A flue header kit (horizontal or vertical) must be fitted to boiler.
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 by Gastec and conform 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.
