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
:
Low Pressure Installation Pipes
BS 6798
:
Installation of Gas Fired Hot Water Boilers of
Rated Input Not Exceeding 70kW
BS 5449
:
Installation Pumped Central Heating
BS 5546
:
Installation of Gas Hot Water Supplies for
Domestic Purposes (2nd family gases)
BS 5440.1
:
Flues (for gas appliances of rated input not
exceeding 70kW)
BS 5440.2
:
Air Supply (for gas appliances of rated input not
exceeding 70kW)
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.
BSEN 12828:2003
:
Heating Systems in Buildings: Design for water
based heating systems
BSEN 12831:2003
:
Heating Systems in Buildings: Method for
calculation of design heat load
BSEN 14336:2004
:
Heating Systems in Buildings: Installation and
commissioning of water based heating systems
WD388/0/2004 Chapter 2 : General Instruction The Keston C36 Combi & C36P Combi Boilers
Installation & Servicing Instructions
Page : 6
