9
Condensate
Trap
3 Way
Diverter Valve
Flow Sensor
Combustion
Analyser
Test Point
Flue
Air
Automatic
Bypass
Primary E
x
pansion Vessel
Automatic
Air Vent
Gas
Valve
I
solation Valve
I
solation
Valve
Pump
Primary
Relief
Valve
Heat E
x
changer
Combination Valve
Tundish
Cross/Check
Valve
Tundish
Gas
Gas Cock
D.H.W. Sensor
Hot Water
Cylinder
CH
Return
CH
Flo
w
Schematic Diagram
Filling Loop
Double
Check
Valve
DHW
Cold Main
Stopcock
Balanced Cold
Feed to Shower
Pressure Relief Valve
Secondary
E
x
pansion
Vessel
Fan
A B
T.P.R.V.
Codes of Practice
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 Gas Safe
Registered Installer. It must be carried out in accordance
with the relevant requirements of the:
• Gas Safety (Installation & 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 Codes
of Practice.
In IE, the installation must be carried out by a Competent
Person and installed in accordance with the current
edition of I.S. 813 "Domestic Gas Installations", the
current Building Regulations and reference should be
made to the current ETCI rules for electrical installation.
Fig. 4
In GB the following Codes of Practice apply:
Standard
Scope
BS6891
Specification for low pressure gas pipework
in domestic premises.
BS5440 Pt.1
Specification for installation of flues.
BS5440 Pt.2
Specification for installation of ventilation for
gas appliances (except that compartment
ventilation is amended in section 8 of these
instructions).
BS5546
Specification for installation of gas hot water
supplies.
BS5449
Specification for forced circulation hot water
central heating systems.
BS6798
Specification for installation of gas fired hot
water boilers of rated input not exceeding
70kW.
In IE:
I.S. 813
Domestic Gas Installations.
The following BS standards give valuable additional information:
BS6891
Specification for low pressure gas pipework
in domestic premises.
BS5546
Specification for installation of gas hot water
supplies.
BS5449
Specification for forced circulation hot water
central heating systems.
© Baxi Heating UK Ltd 2012