around 5
o
C to 10
o
C above the temperature of the return water. The flue pipe should be
terminated outside the building from where they cannot re-enter the building or any other
adjacent building.
The heating level may be controlled by room thermostats, programmer time clocks and
compatible energy management systems. An optional Keston room controller can be
connected which will provide enhanced controls such as room compensation to further
increase efficiency and comfort levels. Once the controls are set the boiler operates
automatically. Further, a Keston outside sensor can be connected to the boiler which will
automatically invoke weather compensated heating which further boosts user comfort and
boiler efficiency.
In the event of the boiler overheating the safety devices will cause a safety shutdown. A
safety discharge valve and discharge pipe is fitted to the boiler.
The C36 Combi features an integral frost protection function which will operate the pump,
regardless of the external controls, should the boiler temperature fall below 10
o
C. In the
event the boiler temperature falls below 5
o
C the boiler will also fire. This is to avoid
damage to the boiler through freezing of boiler water. The boiler will turn off when the flow
temperature exceeds 15
o
C.
The C36 Combi features an integral pump exercise function which will run the pump,
without firing the boiler, for 10 seconds in the event the boiler is on standby for in excess
of 24 hours without firing. This is to help prevent seizing of the pump due to long periods
of inactivity.
2.3
RELATED DOCUMENTS
The Keston C36 Combi and C36P Combi Combination Condensing Boiler must be
installed in accordance with the current issue of the Gas Safety (Installation and Use)
Regulations 1996, current IEE Wiring Regulations, Building Regulations, Building
Standards (Scotland) Consolidation, and the Bye Laws of the local Water Undertaking. It
is the law that ALL gas appliances are installed by a competent person in accordance with
the above regulations.
In addition, due account must be taken to the following Codes Of Practice:
BS 6891
:
Gas Supplies
BS 6798
:
Installation Central Heating Boilers
BS 5449
:
Installation Pumped Central Heating
BS 5546
:
Installation Domestic Hot Water
BS 5440.1
:
Flues
BS 5440.2
:
Air Supply
BS 5482.1
:
Domestic Propane and Butane Burning
Installations
BS 7074.1
:
Expansion Vessels
BS 7593
:
Treatment of Water in Hot Water Central Heating
Systems
BS 7671
:
Requirements for Electrical Installations. IEE
Wiring Regulations 16th Edition.
For Timber Framed Buildings, British Gas Publications DM2. Also British Gas
Publications 'Guidance Notes For The Installation Of Domestic Gas Condensing
Boilers' and 'Specification For Domestic Wet Central Heating Systems'.
In IE, the installation must be carried out by a competent person and installed in
accordance with the current edition of IS813 “Domestic Gas Installations”, the current
Building Regulation and reference should be made to the current ETC1 rules for electrical
installations.
No alterations should be made to the boiler without written permission from Keston Boilers
Ltd. Any unauthorised modification will invalidate the warranty and may affect the safe and
efficient operation of the boiler.
WD388/0/2004 Chapter 2 : General Instruction The Keston C36 Combi & C36P Combi Boilers
Installation & Servicing Instructions
Page : 5
